Reza Bagheri; Ali Ariapour
Volume 25, Issue 4 , February 2019, , Pages 713-722
Abstract
This study aimed to determine the best time of seed collection for Artemisia sieberi and Artemisia aucheri in Saleh abad rangelands of Baft County, Kerman province. After selecting a key area, the time of seed collection started from mid-November to end of January for Artemisia aucheri ...
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This study aimed to determine the best time of seed collection for Artemisia sieberi and Artemisia aucheri in Saleh abad rangelands of Baft County, Kerman province. After selecting a key area, the time of seed collection started from mid-November to end of January for Artemisia aucheri and from mid-October to mid-December for Artemisia sieberi. The seeds were evaluated for germination traits including germination percentage, germination rate, root length, shoot length, and vigor index. The data were analyzed, and the Duncan test was used to compare the mean values of treatments. The results showed that the delay in the time of seed collection of Artemisia sieberi from mid November to mid December caused an increased germination percentage, germination rate, seed vigor, and seedling length as 115, 119, 222, and 49%, respectively. The seeds of Artemisia aucheri collected in the first half of December compared to the first half of November increased seed vigor index, germination percentage, germination rate, and seedling length as 588, 336, 736, and 61%, respectively. Our finding showed that the delay in the time of seed collection in both of these species improved seed germination traits and seedling growth.
reza bagheri
Volume 24, Issue 2 , July 2017, , Pages 338-347
Abstract
Considering the creation of suitable microsites for rangeland species under the canopy of tree species in arid regions, this research was conducted to determine the spatial relationship between tree species in Prosopis sites and a variety of range species. The study was conducted on the Jazmourian ...
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Considering the creation of suitable microsites for rangeland species under the canopy of tree species in arid regions, this research was conducted to determine the spatial relationship between tree species in Prosopis sites and a variety of range species. The study was conducted on the Jazmourian margin of Kerman province. After selecting the area, 34 sites of 2000 m-square were sampled. Chi-square test and Dice and Jaccard indices were used to analyze the data. The results showed that tree species in the mixed Prosopis stands could change the structure of understory rangeland species. In this regard, Prosopis cineraria and Prosopis farcta showed significant positive effects on Capparis spinosa and Aeluropus littoralis (with a correlation coefficient of 0.61 and 0.22), and Alhagi graecorum (with a correlation coefficient of 0.42), respectively, while Prosopis juliflora had negative effects on the presence of Desmostachya bipinnata. As Tamarix stricta becomes dominant, the presence of non palatable species such as Stipa capensis and Desmostachya bipinnata is significantly highlighted, and the presence of palatable species like Aeluropus littoralis reaches zero. According to the results, Prosopis cineraria is recommended to be maintained as a domininat nursing species in the mixed stands to preserve valuable medicinal and forage species.
reza bagheri; sedighe mohammadi; mehrdad saljooghi
Volume 23, Issue 2 , September 2016, , Pages 243-231
Abstract
This research was aimed to investigate the effects of land use change on some soil physical properties. Six sites with similar ecological conditions including ungrazed site (UG), heavily grazed site (HG), moderately grazed site (MG), plowed Glycyrrhiza glabra site (Gl T), dry farming site (D), ...
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This research was aimed to investigate the effects of land use change on some soil physical properties. Six sites with similar ecological conditions including ungrazed site (UG), heavily grazed site (HG), moderately grazed site (MG), plowed Glycyrrhiza glabra site (Gl T), dry farming site (D), and fallow site (F) were selected in Jamalabad region of Baft city. The study was conducted in a randomized complete block design with six replications in 2013. Soil sampling was performed in the study sites and soil physical properties were measured. The results showed that a continuous plowing in Gl T site (plowed every 3-4 years) had no negative impact on soil erodibility; however, if plowing is repeated every year consecutively (the dry farming site), the harmful effects of plowing on soil erodibility will appear and remain on soil along time. The rangelands under grazing management (moderate grazing) significantly reduced the soil erodibility, compared to heavily grazed site; however, there was no significant difference between ungrazed and moderately grazed sites. The bulk density increased in the heavily grazed site (0.35 gr/cm3) compared to moderately grazed and ungrazed sites and there was no significant difference between ungrazed and moderately grazed sites. According to the obtained results, rangeland conservation and moderate grazing strategy are recommended to be applied by the natural resources agencies.
Gholamhosein Rahmani; Reza Bagheri; Ahmad Pourmirzaee
Volume 23, Issue 1 , June 2016, , Pages 29-36
Abstract
Preference value is defined as selection of available species by livestock. In this study, the preference value of 12 perennial species and annual grasses was determined for five months in semi-steppe rangelands of Kerman. The average annual rainfall of the study area is 270 mm. The obtained data were ...
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Preference value is defined as selection of available species by livestock. In this study, the preference value of 12 perennial species and annual grasses was determined for five months in semi-steppe rangelands of Kerman. The average annual rainfall of the study area is 270 mm. The obtained data were analyzed using SAS statistical software based on a factorial design and mean comparisons were performed by Duncan's Multiple Range Test. According to the results, significant differences were found among the study species as well as the interaction effect of species in month (p < 0.01). In addition, a higher preference value was recorded for annual and perennial grasses.
Reza Bagheri; Hamideh Heydari Gharaie
Volume 21, Issue 2 , August 2014, , Pages 347-356
Abstract
To study the allelopathic effect of Cymbopogon olivieri on germination and growth properties of two millet cultivars, an experiment was carried out in a completely randomized design (CRD) with three replications. The treatments included different levels of 0 (control), 12. 5, 25 and 50 gL-1 extract. ...
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To study the allelopathic effect of Cymbopogon olivieri on germination and growth properties of two millet cultivars, an experiment was carried out in a completely randomized design (CRD) with three replications. The treatments included different levels of 0 (control), 12. 5, 25 and 50 gL-1 extract. In another experiment, carried out in the greenhouse, the treatments included four levels of soil. According to the obtained results, all studied traits of kcm7 cultivar were more affected by allelopathic effect of Cymbopogon olivieri, compared to kcm2 cultivar, and all traits (except germination velocity) showed a negative response, immediately after applying 12.5 gL-1 extract. In kcm2 cultivar, the negative response of germination percentage and germination velocity was recorded at 50gL-1 extract. In addition, the negative effect of plumule length and radicle length was recorded at 12.5 gL-1 and 25 gL-1, respectively. The results of greenhouse showed that the radicle length of both cultivars was affected by allelopathic effects of Cymbopogon olivieri. Our results clearly show that kcm2 cultivar is more resistant against the allelopathic effects of Cymbopogon olivieri compared to kcm7 cultivar.
Reza Bagheri; Seyed Mehdi Altaha Maki; Sedigheh Mohammadi
Volume 21, Issue 1 , June 2014, , Pages 32-40
Abstract
Grazing management projects conducted by natural resources offices have been less evaluated in previous studies. This research was conducted in order to determine the effects of grazing management projects on vegetation and some soil physico-chemical properties in Dehsard region of Kerman province. Soil ...
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Grazing management projects conducted by natural resources offices have been less evaluated in previous studies. This research was conducted in order to determine the effects of grazing management projects on vegetation and some soil physico-chemical properties in Dehsard region of Kerman province. Soil and vegetation properties were sampled in early autumn in a completely randomized block design with three replications. Soil samples were taken from depths of 0-15 and 15-30 cm and soil properties including organic matter, total nitrogen, available phosphorus, available potassium, pH, texture, moisture, and electrical conductivity were measured. Fifty-meter length transects were established and species composition and canopy cover percentage were recorded by linear-contact method. Our results showed that grazing management project caused a double increase in the amount of organic matter and nitrogen in soil surface as compared to the adjacent rangelands. Increased shrub and bush species (3.8 and 5%, respectively) is important as the main source of forage. According to these changes over a period of six years in the project area, the effects of grazing management projects can be evaluated as positive.
Reza Bagheri; Mohsen Mohseni Saravi; Mohammad Reza Chaichi
Volume 20, Issue 2 , June 2013, , Pages 417-432
Reza Bagheri; Sedegheh Mohammadi
Volume 19, Issue 2 , September 2012, , Pages 283-296
Abstract
This study was performed in order to determine spatial variations of drought in Kerman province by Standard Precipitation Index (SPI) and comparing interpolation methods of Kriging and inverse distance weight with powers of 1 to 5, over a thirty-year period (1970-71 to 2000-2001). According to the results ...
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This study was performed in order to determine spatial variations of drought in Kerman province by Standard Precipitation Index (SPI) and comparing interpolation methods of Kriging and inverse distance weight with powers of 1 to 5, over a thirty-year period (1970-71 to 2000-2001). According to the results during the study period (10-year intervals), maximum and minimum average amounts of SPI were respectively recorded for 1990-91 and 2000-2001. In all studied years, exponential model was determined to be the best variogram fitted to the spatial structure of data and the effective range of each station was a distance of almost 18.03 kilometers for all years except 1990-91 with an effective range of 5, 02 km. Cross validation techniques introduced Kriging as the best interpolation method for all years except 1990-91 in which IDW to the power of 5 was the best interpolation method. Spatial zoning map of SPI showed that moderate drought was recorded for southern parts of Kerman province such as Anbarabad and Jiroft in 1970-71 while in other parts of the province slight drought was observed except Rafsanjan. In 1980-81, slight drought was observed for most parts of the province while in Bam, Bardsir and east of Jiroft slight moisture was observed. In 1990-91, there was a slight drought was recorded for Kerman, Baft, Kahnooj and east of Jiroft. In 2000-2001, all parts of the province were at risk of drought as in the southern half of the province (Baft, Anbarabad and Kahnoj) moderate drought and in the northern half of the province(Kerman, Rafsanjan and Bardsir) slight drought were observed. Error maps showed considerable accuracy of interpolation, especially near the stations.
Sadigheh Mohammadi; Ali Salajegheh; Mohammad Mahdavi; Reza Bagheri
Volume 19, Issue 1 , June 2012, , Pages 60-71
Abstract
Due to the variation of ground water properties in temporal and spatial scale, these properties can not be assumed constant over time and space. This research was conducted to assess spatial and temporal variations of ground water table in Kerman plain during a 10-year period (1375-1385) by using the ...
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Due to the variation of ground water properties in temporal and spatial scale, these properties can not be assumed constant over time and space. This research was conducted to assess spatial and temporal variations of ground water table in Kerman plain during a 10-year period (1375-1385) by using the best geostatistical estimator. Firstly, available statistical resources related to the ground water table of this plain (including 67 wells) were collected. After controlling for quality, accuracy and normality of the data, different interpolation techniques were used including kriging (with and without logarithm), cokriging, inverse distance (with exponents of 1 to 5). The best technique was selected based upon MAE and MBE criteria and provided spatial zonation maps in the beginning and end of the period. Spatial zonning maps were prepared at the beginning and end of the study and ultimately, iso-falling map was provided in Arc GIS 9.1 package. Our findings showed that Gaussian variogram model was the best for spatial structure of these data and inverse distance method with exponents of 5 and 4 were the best interpolation methods in the beginning and end of the period, respectively. Zonation maps showed a falling trend of the ground water level in majority of the plain. Maximum falling data (32 meters), was recorded respectively for the northern outlet of the plain with an effective range of 17 and 62 pizometers and western outlet with an effective range of 8 pizometers. Also, the results showed an upward trend of water, as 7 meters, in effective range of some wells with 50 and 52 pizometers in Kerman city due to being located in sewage and waste water zone of the city.
Reza bagheri; Sedegheh Mohammadi
Volume 17, Issue 4 , November 2011, , Pages 538-548
Abstract
Allelopathy is interaction effects of plants on each other through extracted chemical compounds. This phenomenon that has not been considered in range improvement is of important concerns in rehabilitation of rangelands. In this study, we tested allelophatic effects of Artemisia sieberi ongermination ...
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Allelopathy is interaction effects of plants on each other through extracted chemical compounds. This phenomenon that has not been considered in range improvement is of important concerns in rehabilitation of rangelands. In this study, we tested allelophatic effects of Artemisia sieberi ongermination percentage, stem fresh weight and root fresh weight of three species (Agropyron desertorum, Agropyron elongatum and Atriplex canescens) that are widely used in range improvement. Powder of Artemisia sieberi (stem, leaf and root) collected from natural habitats in flowering stage (end of Novambr) was mixed with different concentration levels ( 0%, 0/1 %, 1% and 10 %) in four replicetions and was planted in sand under laboratory condition based on completly rondom design. After putting 25 live seeds of the mentioned species in each pot, three variables as germination percentage, stem fresh weight and root fresh weight were measured and then ANOVA and Duncan's multiple range tests were applied to analyze the data in SPSS software. According to the results decrease rate of germination percentage in comparison to control treatment were as follows :in Agropyron desertorum 60 and 83% from 1 and 10 % leaf concenterations respetively, in Agropyron elongatum 84/2% from 10% leaf concentration and in Atriplex canescens 83/3 and 88/9% from 1 and 10% all tissues concentrations respectively. Also our finding showed that stem weight of Agropyron elongatum was decreased to 48 and 94/5%, respectively in 1 and 10 % of leaf tissue and root weight of Atriplex canescens was decreased to 82/2 and 88/1% in 1 and 10 % of all tissues in comparison to control treatment. According to results of the study under laboratory condition, rehabitating of Artemisia sieberi sites through using the mentioned species probably will not be successful.
Reza Bagheri; Mohammad reza Chaichi; Mohsen Mohseni Saravi
Volume 17, Issue 2 , September 2010, , Pages 301-316
Abstract
This research was studied in order to determining grazing intensity effects on soil moisture and vegetation in Khabr region of Kerman province for two years. Natural sites under three grazing pressures (heavy, moderate and non grazed) with same ecological factors were selected from Khabr National Park ...
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This research was studied in order to determining grazing intensity effects on soil moisture and vegetation in Khabr region of Kerman province for two years. Natural sites under three grazing pressures (heavy, moderate and non grazed) with same ecological factors were selected from Khabr National Park and near rangelands. After determining sampling area, soil moisture factor was investigated monthly (on grazing period) in 0-15 and 15-30 centimeters depth of each site with 5 replication and canopy cover sampling was conducted in three temporal stages (before, middle and after grazing) using line transect method in three replication for each site. SPSS package was used for statistical analysis. Result showed that heavy grazing reduced total canopy cover, specialy perennial grass and shrubs, than non grazed site in the end of grazing period. Also heavy grazing reduced the soil moisture content with decreasing rate as 16.87% and 25.07% , than moderate and non grazed sites , respectively. Harmful effect of drought in 2006 was severly affected on heavy than moderate and non grazed site. According to results, non and moderate grazed sites occure in state condition (due to more canopy cover of Artemisia sieberi and other species such as prennial grass) and heavy grazed site occure in transition to downward state condition (due to one dimentional dominant of Artemisia sieberi and emergence of undesirable species such as Marrobium vulgaris and Peganum harmala) in state and transition model of Iranian Artemisia habitat. Thus, without management plan, we will observe dominance of undesirable species and rangelands degradation.