Masoumeh Rahimi Dehcheraghi; Hossein Arzani; Hossein Azarnivand; Mohammad Jafari; Mohammadali Zare Chahouki
Volume 30, Issue 1 , April 2023, , Pages 48-59
Amir Masoud Pouyafar; Hossein Arzani; Seyed Akbar Javadi; Asghar Tahmasebi
Volume 29, Issue 2 , July 2022, , Pages 176-185
Abstract
This study aimed to identify the economic, social, and ecological indicators affecting the beekeeping model in rangelands in the Sarayan region of South Khorasan province. This research is applied in terms of purpose, descriptive-analytical method, and quantitative in terms of data collection. The statistical ...
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This study aimed to identify the economic, social, and ecological indicators affecting the beekeeping model in rangelands in the Sarayan region of South Khorasan province. This research is applied in terms of purpose, descriptive-analytical method, and quantitative in terms of data collection. The statistical population of the study included all ranchers in the Sarayan region. Using Krejcie and Morgan's table, 180 ranchers were selected by random sampling method. The data collection tool and information were a researcher-made questionnaire designed to assess the tendency of pastoralists to beekeeping in the rangeland and determine the main indicators of their unwelcome to this type of livelihood using a semi-structured interview method. The reliability of the questionnaire was 0.86 using Cronbach's alpha test. The results showed that in 61.7% of ranchers, the tendency to beekeeping was reported to be high and very high. So that there is a significant correlation between age (at 99% level), level of education (at 99% level), and percentage of rangeland dependence (at 95% level) with a tendency to beekeeping in rangeland. However, this correlation was negative for age and percentage of rangeland dependence. The results of ranking the important indicators of ranchers' reluctance to beekeeping also showed the indicators of knowledge, insufficient knowledge and skills, the safety of hives in the rangeland, low risk-taking spirit, and rangeland ownership as the most important social indicators, cost of providing, transferring and maintaining hives in the rangeland. The most important economic indicators and short indicators of the rangeland flowering period, poor vegetation, lack of sufficient water resources, and environmental risks (drought, storms, pests, and diseases) were considered the ecological indicators from the perspective of rangers.
Amir Ghorbankhani; Hossein Arzani; Ali Tavili; Javad Motamedi
Volume 29, Issue 1 , February 2022, , Pages 1-10
Abstract
Salsola laricina is one of the main elements of vegetation communities in the steppe rangelands of the dryland region, which protects it from disturbances and provides conditions that can preserve its ability to rehabilitate after chest, is one of the basic requirements of rangeland management in such ...
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Salsola laricina is one of the main elements of vegetation communities in the steppe rangelands of the dryland region, which protects it from disturbances and provides conditions that can preserve its ability to rehabilitate after chest, is one of the basic requirements of rangeland management in such fields. Therefore, in the present study, the variability of structural and functional traits and morphological characteristics and seed germination were tested under supportive grazing. For this purpose, by establishing a sampling system inside and outside of the 10 year old Khoshkerood detention, the vegetation cover and structural and functional traits of Salsola laricina species, such as crown cover, density and forage production in the field were measured. Seed of healthy and healthy rootstocks, morphological characteristics and seed germination, such as; 1000 seed weight, germination percentage, germination rate, root length, stem, seedling, and finally vigor index (straw) Seed) was measured in laboratory conditions. The results showed that the values of structural and functional traits, inside the enclosure, are more than outside the enclosure. In this regard, the percentage of crown cover, density, and amount of production of Salsola laricina species were respectively in the enclosure relative to the outcrop, 5.46 and 3.6%, 21600 and 17000 bases per hectare and 161.4 and 12.71 kg respectively hectare. The average of morphological and germination characteristics of the seeds collected from the intruder was also greater than the outside grazing. So that the highest index of seed vigor as a sum of outcomes of morphological and germinating properties in inoculated and outcroped seeds is 389.88 and 1037.37, respectively. The increase of these values in the enclosure relative to the outcrop; indicates the effect of supportive grazing on the improvement of structural and functional characteristics and the morphological and seed germination characteristics of rangeland species in vulnerable ecosystems in arid areas.
Nematolah Madadizadeh; Hossein Arzani; Seyed Akbar Javadi; Seyed Hamid Movahed Mohammadi; Mohammad Hosein Razaghi
Volume 28, Issue 2 , June 2021, , Pages 195-207
Abstract
In the current era of participation, the rule of common sense and the involvement of all stakeholders in key decisions have been accepted. Targeting and directing partnerships to conserve and rehabilitate natural resources will lead to sustainable development. The concepts of participation and the affecting ...
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In the current era of participation, the rule of common sense and the involvement of all stakeholders in key decisions have been accepted. Targeting and directing partnerships to conserve and rehabilitate natural resources will lead to sustainable development. The concepts of participation and the affecting factors need to be explained and studied. The aim is to investigate the factors affecting the participation of local communities in natural resource management from the perspective of experts in the region, Kerman. The research is descriptive-analytical, and the survey technique is used. Necessary information has been collected by completing 40 questionnaires from all natural resources experts of the province and the project (RFLDL) in the form of a census. The research tools of the questionnaire and its validity have been approved by experts. Using Cronbach's alpha coefficient, the reliability coefficient for the questionnaire items was determined to be 0.84. The reliability of the research items was measured by Cronbach's alpha statistic, the results of which (coefficient 0.84) indicate the high reliability of the items for measuring variables. Multiple regression tests have been used to determine the share of factors (eocnomic, extension, educational and managerial) on the participation of users from the perspective of experts. The results showed that social factors had a much greater share in predicting the dependent variable than other variables. Based on the results, giving importance to social factors can play an important role in attracting the participation of rangers in rangeland management.
Eshagh Omidvar; Hossein Arzani; Saeed Mohtashamnia; Seyed Akbar Javadi; Mohammad Jafary
Volume 28, Issue 1 , April 2021, , Pages 1-10
Abstract
Regardless of rangeland plant production, it is not possible to plan and manage livestock and rangeland. Attention to rangeland forage production is essential for efficient and effective rangeland management. This importance is determined by identifying the relationship between forage ...
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Regardless of rangeland plant production, it is not possible to plan and manage livestock and rangeland. Attention to rangeland forage production is essential for efficient and effective rangeland management. This importance is determined by identifying the relationship between forage production of plants and climatic variables which affect them in the field. For this purpose, the annual forage production values of rangeland index species were measured in Omidabad Eastern site during the years of 1998-2008 for 10 years in the national plan for rangeland assessment of different climatic zones and their re-measurement during the years of 2017-2018 for two years by cutting and weighing in 60 random plots of two square meters along four 300-meter tracts. The amount of rainfall and monthly temperature in this time interval were also calculated using the data of Abadeh meteorological station in all months separately each year. The amount of annual dry forage production of each species as a dependent variable and the amount of rainfall and temperature calculated as independent variables and relationships between them were investigated using a linear multivariate regression program in SPSS software. The results showed that rainfall, winter, and fall temperatures had a significant effect on species production and spring rains as well as the temperature of the growing season, in April and May, alone did not affect the forage production of the species and based on the results research, with the availability of rainfall and temperature data, the annual forage production of the studied species and the annual production of the coming years can be estimated with high accuracy.
Reza Chamanpira; Reza Siahmansour; Hossein Arzani
Volume 27, Issue 2 , June 2020, , Pages 204-214
Abstract
One of the main goals of rangeland assessment is to obtain the amount of forage production of rangeland species because it plays an essential role in determining rangeland capacity and grazing management. Measuring the amount of production requires a lot of time and costs, so finding cheap, fast and ...
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One of the main goals of rangeland assessment is to obtain the amount of forage production of rangeland species because it plays an essential role in determining rangeland capacity and grazing management. Measuring the amount of production requires a lot of time and costs, so finding cheap, fast and scientific methods to estimate the amount of production can be a great help in assessing vegetation and rangeland management. The purpose of this study was to find a suitable relationship between the percentage of canopy cover of species and plant classes with their production amount. For this purpose, the percentage of canopy cover of the species was examined during a six-year statistical period within 60 plots (1m2) located along six transects (200 m). In addition, each year, the amount of species production in a quarter of the plots (25% of them) that were caged to prevent possible grazing, was measured by clipping. To determine the amount of total forage production, the regression relationship between canopy cover and species production was used and based on the significance of the equation (p≤ 0.05) and coefficient of determination (R²), the best equation was fitted. The results showed that there was a significant correlation (p≤ 0.01) between production as a dependent variable and the percentage of canopy cover of the species as an independent variable. The coefficient of determination for each of the classes I, II and III were 0.77, 0.87 and 0.92, respectively, which provide the most appropriate linear production-canopy relationship for rangeland management.
Ali Farazmand; Hossein Arzani; seyed Akbar Javadi; Abbasali Sanadgol
Volume 26, Issue 1 , June 2019, , Pages 187-200
Abstract
Over 50% of the country's surface is rangeland and livestock grazing is the main use of rangelands. Therefore, in the range of cities, rangelands should be considered not only in terms of livestock forage, but also for recreational aspects. The Gilizjand Watershed with an area of 16210.44 ...
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Over 50% of the country's surface is rangeland and livestock grazing is the main use of rangelands. Therefore, in the range of cities, rangelands should be considered not only in terms of livestock forage, but also for recreational aspects. The Gilizjand Watershed with an area of 16210.44 hectares is located in northern Firouzkooh city of Tehran province. According to the Demarton modified method, it has a cool semi-arid climate. This research was conducted on the basis of the FAO guidelines (1991), and GIS on a scale of 1: 20000, the limiting factor method was used. At first, the existing condition of the rangelands was studied. Then, factors affecting tourism including environmental and ecological factors (climate, elevation, slope, attractions of the area, water resources, and soil) and infrastructure factors (access to the area and distance to service centers and welfare centers) were studied. Eventually, the suitability of the rangelands of the region was determined for tourism and recreation.The results showed that 1% of the area was in the good suitability class (S1), 9.4% in the middle suitability class (S2), 29.4% in the poor suitability class (S3) and 60.2% in the non suitable class (N).The results also showed that the slope percentage, water content, distance from human-made attractions and plant composition were limiting factors for tourism in the Gilizjand watershed.
Kambiz Kamrani; Hossein Arzani; Seyed Akbar Javadi; Reza Azizinejad
Volume 25, Issue 4 , February 2019, , Pages 748-760
Abstract
The most important executive policy of the government is optimizing range management plans in the rangelands. Improvement, development and proper exploitation of rangelands depend on understanding the current rangeland condition and selecting a range management method (balanced, natural and artificial) ...
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The most important executive policy of the government is optimizing range management plans in the rangelands. Improvement, development and proper exploitation of rangelands depend on understanding the current rangeland condition and selecting a range management method (balanced, natural and artificial) to be implemented in the form of a range management plan (RMP). Data were collected from 16 ranch units of Haraz River watershed to investigate differences in methods. At first, the statistics and information of the rangelands including the total percentage of vegetation and each of the important desirable and increasing species, rangeland condition and trend, and rangeland production were extracted and studied in 2016. To determine the best range management method based on rangeland condition, the analysis of variance was used in a completely randomized design with three treatments. To compare the effect of each method during the implementation of the plan and in the current situation on the rangeland condition, trend and production of rangelands, the Duncan's test and to compare the quantitative characteristics measured before and after the implementation of the rangeland management plans, a two-sample independent t-test were used. Moreover, the non-parametric Mann-Whitney U test was used to compare qualitative characteristics using SPSS. In this research, rangeland management methods were considered as a treatment and time intervals were considered as a replicate. The results showed that although the vegetation percentage of palatable species composition did not increase, the balanced and natural methods were the best rangeland management methods in the good and fair rangeland condition, respectively. The reason for not increasing the palatable species was the unsuccessful implementation of planned programs in Range Management Plans (RMPs). On the other hand, although the artificial range management method was correctly performed in the RMPs with poor vegetation types, the implementation of these plans had no significant effect on the rangeland condition and trend of the study rangelands due to the high livestock population. It has also caused the cost of implementing reclamation and improvement projects on the beneficiaries. Although the percentage of vegetation cover of undesirable species of rangelands has increased, over the past 25 years, the total percentage of canopy cover and production has decreased. It seems that rangeland plans will be more effective when there is a balance between grazing capacity and livestock population.
massoud Borhani; Hosein Arzani; zahra jabeolansar
Volume 24, Issue 2 , July 2017, , Pages 249-258
Abstract
Range management method (RMM) is an important element of range management especially in the case of revegetation and rehabilitation of vegetation. This study aimed to investigate proper RMM and grazing systems for paddocks of Semirom in Esfahan province and comparing them with programs proposed by the ...
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Range management method (RMM) is an important element of range management especially in the case of revegetation and rehabilitation of vegetation. This study aimed to investigate proper RMM and grazing systems for paddocks of Semirom in Esfahan province and comparing them with programs proposed by the offices of natural resources. For this purpose, 29 paddocks under range management plan were selected and proposed RMM and grazing systems were defined. According to range condition and trend in the mentioned paddocks, RMM and grazing system maps were prepared using standards the defined theoretically. The results showed that in most cases, the proposed range management method in rangelands was consistent with the correct method based on rangeland condition. On the other hand, for 20 range management plans, despite artificial RMM, grazing system was predicted, which was not based on correct range management. Our results clearly showed that the proposed grazing systems were not implemented practically in range management plans of the study area due to technical difficulties in range parceling and controlling. In addition, in these areas, grazing schedule in accordance with grazing system does not have considerable advantages.
Alireza Eftekhari; Hosein Arzani; Ehsan Zandi Esfahan; esmaiel Alizadeh
Volume 23, Issue 2 , September 2016, , Pages 218-209
Abstract
Given the breadth and importance of rangelands in water and soil conservation, fodder production and environmental services and evidence of the destruction of this resource, some measures must be taken to prevent damage and also improve its condition. One of the most important measures is preparation ...
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Given the breadth and importance of rangelands in water and soil conservation, fodder production and environmental services and evidence of the destruction of this resource, some measures must be taken to prevent damage and also improve its condition. One of the most important measures is preparation and implementation of Range Management Plans. Hence, it is necessary to consider implemented projects to know that how much they have contributed in preventing damage and improving rangelands. In this research winter rangelands (with and without Range Management Plans) were investigated in Zarandieh. For this purpose, 16 rangelands with Range Management plan and 14 rangelands without Range Management plan were selected so that all management types (private, collective and different areas of rangeland) were taken into consideration with same climate conditions as far as possible. Consequently all rangelands were selected from Mamoonieh-Zarandieh region with warm and dry weather. After calculating the number of plots (60) and its size (2m2) in each vegetation type, a reference area was selected in which vegetation factors including canopy cover, yield, density, litter, species richness, range condition and trend were evaluated in time of range readiness. Statistical analysis of data was performed by t-test. According to the results, there were significant differences between studied rangelands in most of factors. Overall result of the study showed a better condition for rangelands with Range Management Plans.
Mina Bayat; Hosein Arzani; Adel Jalili
Volume 23, Issue 2 , September 2016, , Pages 372-357
Abstract
In this study, the effects of three important climate factors including rainfall, temperature, and relative humidity were studied on vegetation cover and forage production for ten years (1997-2007) as well as in the Alavijeh and Khondab steppe rangelands, Isfahan province, in 2013. The results of the ...
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In this study, the effects of three important climate factors including rainfall, temperature, and relative humidity were studied on vegetation cover and forage production for ten years (1997-2007) as well as in the Alavijeh and Khondab steppe rangelands, Isfahan province, in 2013. The results of the eleven-year study in steppe rangelands showed that shrubs and grasses had the highest and lowest vegetation cover and production and the average vegetation cover and average production were calculated to be 12% and 124.5 kg per hectare. The results of simple regression analysis showed that in steppe rangelands, the total vegetation cover is affected by annual rainfall and temperature, so that vegetation cover increased with increasing annual rainfall and decreasing temperature. The total production in the study rangelands is affected by annual rainfall, cold season rainfall, and minimum temperature. The long-term production was calculated to be 55 and 176.6 kg per hectare for the Khondab and Alavijeh sites, respectively. According to the results of stepwise regression, using climatic factors, the relative humidity with temperature of December and annual rainfall was identified as the best equation to estimate the annual vegetation cover in the Khondab and Alavijeh sites. In the Khondab site, the temperature of November and total rainfall from March to May was identified as the best equation to estimate the annual production. However, in the Alavijeh site, the total rainfall of growing season, minimum temperature of March, and temperature of May and December was the best. Therefore, the impact of climate conditions on vegetation cover and annual production and different life forms are not similar in the steppe rangelands.
Hossein Arzani; Zeinolabedin Hosseini; Khosro Mirakhorlou
Volume 21, Issue 1 , June 2014, , Pages 24-31
Abstract
This study was aimed to assess the applicability of LANDSAT ETM+ satellite images for estimating vegetation production and cover. The images were digitized using topographic maps and geometrized in 1:25000 scales. Required processes such as spectral ratio measurement and vegetation indices were applied ...
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This study was aimed to assess the applicability of LANDSAT ETM+ satellite images for estimating vegetation production and cover. The images were digitized using topographic maps and geometrized in 1:25000 scales. Required processes such as spectral ratio measurement and vegetation indices were applied on the images. Collection was carried out for vegetation cover and production in various vegetation types in homogeneous units. Sampling points' locations were recorded with GPS. Sampling method was random-systematic in such a way that in each unit, a circle with 20 meters radius was considered. One and 9 sampling plots were placed on the centre and on the perimeter, respectively. The plot size was 1m * 1m. In each plot, vegetation percentage was estimated and the production was calculated using double sampling method. Then, DN values for each sampling unit (9 pixels for one unit) were elicited in respect to primary bands' images, vegetation indices and spectral ratios. Correlation and regression analyses between geo-information and satellite information (Digital numbers) were carried out. Results revealed that 7th and 5th Bands and IR1, MIRV2 and VNIR2 indices had a significant correlation with production and given parameter could be estimated through regression models. Likewise, RA, IR1 and TVI indices had a significant correlation with vegetation percentage and this parameter could be estimated through regression models.
Hosein Arzani; Javad Motamedi; Ali Nikkhah; Hosein Azarnivand; Mehdi GHorbani
Volume 20, Issue 3 , November 2013, , Pages 333-344
Hossein Arzani; Javad Moetamedi (Torkan); Mohammad Jafary; Mehdi Farahpour; Mohammad Ali Zare chahooki
Volume 20, Issue 2 , June 2013, , Pages 271-250
Hossein Arzani; Javad Motamedi (Torkan); Ali Nikkhah; Hossein Azarnivand; Mehdi Ghorbani
Volume 19, Issue 4 , March 2013, , Pages 557-570
Abstract
Information on animal requirements is essential to calculate rangeland grazing capacity. Therefore, animal weight and animal unit equivalent (AUE) of each breed should be determined independently. In this research, live weight of Kabodeh sheep was determined based on average live weight of 3 and 4 years ...
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Information on animal requirements is essential to calculate rangeland grazing capacity. Therefore, animal weight and animal unit equivalent (AUE) of each breed should be determined independently. In this research, live weight of Kabodeh sheep was determined based on average live weight of 3 and 4 years old ewes. For this purpose, two herds of Kabodeh breed were selected. In each herd, 15 three–year-old ewes, 15 four-year-old ewes, 5 three-year-old rams, 5 four year-old-rams, 10 three-month-old lambs and 10 six-month--old lambs were selected. They were weighed two times including at the time of grazing season in lowland and highland rangelands. For determination of dry matter requirement, forage quality was taken into consideration. According to the results, animal weight for herds (three and four years old ewe) was 52.66±0.86 kg. Therefore, animal unit equivalent (AUE) for rams, ewes, 3 and 6-month-old lambs were 1.07, 1.66, 0.38 and 0.51, respectively. According to MAFF equation (1984), daily metabolizable energy requirement for maintenance condition was calculated 9.89 and 10.60 Mj (including that multiplied by 1.4 and 1.5) by considering condition of rangelands and distances from watering points and plant density in lowland and highland rangelands. Dry matter requirement was calculated 1.98 and1.80 kgbased on forage quality in lowland and highland rangelands.
Seyed Akbar Javadi; Shadi Mohamad pori naeem; Hossein Arzani; Ahmad Ahmadi
Volume 19, Issue 4 , March 2013, , Pages 571-580
Abstract
Determination of forage quality of rangeland species is one of the fundamental factors for evaluation of grazing capacity and management of rangelands. In this study, forage quality of Agropyron libanoticum was compared in three phenological stages in Nejh valley, Urmia. After sampling, quality indices ...
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Determination of forage quality of rangeland species is one of the fundamental factors for evaluation of grazing capacity and management of rangelands. In this study, forage quality of Agropyron libanoticum was compared in three phenological stages in Nejh valley, Urmia. After sampling, quality indices such as ADF, CP, ME and DMD were measured in laboratory. Results showed that there were significant differences among the growth stages (at 1 % level of probability). Forage quality of vegetative growth stage was higher than that of flowering and seed ripening stages. Crude protein content decreased from early growth to the end of growth and there was significant difference among vegetative growth stage and flowering as well as seed ripening stage.
Zeinab Jafarian; Hossein Arzani; Mohammad Jafari; Ghavamedin Zahedi; Hossein Azarnivand
Volume 19, Issue 3 , December 2012, , Pages 371-381
Abstract
This research was aimed to investigate the relationships between dominant rangeland species and environmental factors in the Rineh rangelands located on the southern slope of Damavand Mountain. Stratified random sampling method was applied and the study area was classified to 37 sample units based upon ...
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This research was aimed to investigate the relationships between dominant rangeland species and environmental factors in the Rineh rangelands located on the southern slope of Damavand Mountain. Stratified random sampling method was applied and the study area was classified to 37 sample units based upon elevation, slop and aspect.
In the study area, 750 plots 1m2 and 75 plots 25m2 were established. One hundred and fifty soil samples were dug at the depth of 0-30 cm and 16 soil properties including pH, CaCo3, bulk density, particle density, total phosphorus, total nitrogen, absorbed potassium, organic matter, saturation moisture, soil texture, field capacity, permanent wilting point, available water capacity and water holding capacity were measured in laboratory. After collecting the climate data, 16 climate factors including average relative humidity, average rainfall, average temperature, average minimum temperature, average maximum temperature in spring, summer and annual as well as annual frost days were selected to reconstruct the missing data. IRS images including red and near-infrared bands and PAN band as well as combined bands derived from RVI, NDVI, and PCA were selected. Regression equation was developed for each species using logistic regression. Results indicated that most of the factors including slop, aspect, average minimum temperature in spring, number of frost days, average daily temperature in summer, and most of the soil factors were entered in regression models. Also, satellite data were used as effective tools in showing the presence of plant species.
Hossein Arzani; Hossein Pouzesh; Javad Motamedi (torkan); Rasoul Mirakhorli; Seyed Ali Niknejad
Volume 19, Issue 3 , December 2012, , Pages 384-394
Abstract
In this study, five rangeland species including Festuca rubra, Astragalus glocucantus, Astragalus flocoffus, Acantolimon erinaceum and Acantophyllum sordidum were selected at three phenological stages of vegetative growth, flowering and seeding. These species are almost palatable and important in rangelands ...
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In this study, five rangeland species including Festuca rubra, Astragalus glocucantus, Astragalus flocoffus, Acantolimon erinaceum and Acantophyllum sordidum were selected at three phenological stages of vegetative growth, flowering and seeding. These species are almost palatable and important in rangelands of Jashlobar, Semnan. For each phenological stage, three replications and for each replication, five species were collected. Plant samples were analyzed to determine N percentage as well as acid detergent fiber (ADF). Crude protein (CP), dry matter digestibility (DMD) and metabolizable energy (ME), were estimated based upon N percentage and acid detergent fiber (ADF)., Split-plot design was applied for data analysis in a randomized complete design with 3 replication sand 15 treatments for each location. After collecting the data, combined analysis of variance was used in order to investigate the changes of forage quality index. According to the results, chemical composition of plants showed significant changes and phenological stages had a significant effect on forage quality. With the advance of growth, CP, DMD and ME decreased while ADF content increased. Obtained results are applicable for estimating daily required forage for grazing livestock and determining appropriate time for livestock entry to the rangeland.
Hosein Arzani; Somayeh Alikhani; Akbar Javadi; Bardia Nourian
Volume 16, Issue 4 , January 2010, , Pages 431-444
Abstract
Information about animal requirement, available forage and its quality is fundamental for successful range forage and livestock management. Since sheep is dominant grazing animal on rangelands in Iran and there are about 27 sheep breeds and each breed has special body size and physiological condition, ...
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Information about animal requirement, available forage and its quality is fundamental for successful range forage and livestock management. Since sheep is dominant grazing animal on rangelands in Iran and there are about 27 sheep breeds and each breed has special body size and physiological condition, different daily nutrition requirements need to be considered. It is necessary daily requirement of each breed based on quality of available forage be determined which was the main objective of this research for Moghani sheep breed in Kalibar rangelands in eastern Azerbaijan province of Iran. Vegetation composition was formed by 11 species including Hordeum glavum, Aegilops sylindrica, Artemisia fragrans, Agropyron trichophorum, Festuca ovina, Dactylis glomerata, Stipa barbata, Sinapis arvensis, Bromus tectorum, Bromus tomentellus and Kochia prostrata. Among them Hordeum glavum, Aegilops sylindrica, Artemisia fragrans, Stipa barbata, Sinapis arvensis, Bromus tomentellus, and Kochia prostrata were existed in lowland, and other species were observed in highlands. Samples were collected from an exclosure about 25-31 of May in flowering stage and 4-6 of July in maturity stage. Forage quality was evaluated based on chemical combination including crude protein (CP), acid detergent fiber (ADF), dry matter digestibility (DMD) and metabolizable energy (ME). For comparison of results One-Way Analysis of Variance (ANOVA) was used. Duncan test was used to determine inside changing sources and comparing species and location with pFestuca ovina and lowest forage quality was obtained in Hordeum glavum. Among two Phenological stages of (flowering & maturity) the higher percent of CP, DMD and rate of ME were obtained in flowering stage and the lowest percent were belonged to maturity stage. The higher percent of ADF was measured for maturity stage and the lowest Percent of ADF was obtained in flowering stage. Thus there were significant differences (p<0.01) between ADF, CP & ME of species. There were also significant differences between chemical components of species in different phenological stages and areas. Moghani sheep daily requirement based on MAFF equation considering forage quality and physical condition of the areas in two phonological stages and maintenance condition with 40% additional requirement were 1.39 kg DM and 2.14 kg DM in flowering and maturity plant growth stages respectively. Generally considering average metabolizable energy of species daily animal requirement in highland and lowland were 1.53 and 1.95 kg DM respectively.
Hosein Arzani; Khosro Mirakhorlou; Zeinalabedin Hosseini
Volume 16, Issue 2 , December 2009, , Pages 150-160
Abstract
Range management needs to accessing data by fast and suitable methods for planning. Satellite data and geographic information systems (GIS) can be used for planning and integrating field and remotely sensed data. Landuse map is one of the most important information in range management plans. This requires ...
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Range management needs to accessing data by fast and suitable methods for planning. Satellite data and geographic information systems (GIS) can be used for planning and integrating field and remotely sensed data. Landuse map is one of the most important information in range management plans. This requires overlaying, retrieve and analysis detailed information about the rangelands in GIS. Land use map provided using Landsat7 ETM data (15 Apr. 2004) for the study area (middle catchment’s of Taleghan) in the Tehran province. Based on histogram of bands and statistical analysis, bands 4, 3, 2 were selected for color composite in unsupervised classification method. We identified 4 classes land use type of study area in the fieldwork. Ground data was collected using systematic with random start point, from 86 plots (250*250m), using unsupervised map as a primary map. Overall, with combining the ETM data and the field data using supervised classification method, boundary of the landuse types were put in four classes (Rangeland, Farm land, Dry farming and Bare soil). The classification accuracy assessment showed that the overall accuracy 70.64 percent and accuracy rates of the rangeland, farm land, rain fed carping and bare soil were 81, 54, 61, and 81 percent, respectively. So it is possible to use Landsat 7 ETM+ data for landuse mapping which is essential in range management and range suitability classification.
Hosein Arzani; Mohammad reza Sadeghi manesh; Hosein Azarnivand; Ghasem Asadian; Ehsan Shahriari
Volume 15, Issue 1 , January 2008, , Pages 42-50
Abstract
Determination of grazing capacity depends on information about various factors such as forage quality and species nutrient values, and for achieve to ideal animal production information about nutrient value are very important. In this trial, nutrient values of twelve species were to evaluate, that were ...
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Determination of grazing capacity depends on information about various factors such as forage quality and species nutrient values, and for achieve to ideal animal production information about nutrient value are very important. In this trial, nutrient values of twelve species were to evaluate, that were grazed by Mehraban sheep in two phenological stages (vegetative and maturity) in two sites of AghDagh & Galebor at Hamadan province. Forage quality indices as Crude protein (CP), acid detergent fiber (minus Hemicelluloses) (ADF),dry matter digestibility (DMD) and metabolisable energy (ME) were measured respectively. According to the results, significant differences were observed among the species and phonological stages for all measured and calculated forage quality factors (p<0.05). Generally, Information about forage quality factors is essential for animal nutrition management in rangeland and it should be considered in range and animal management designs.