Farhad Azhir; Moham,mad Fayaz
Volume 26, Issue 4 , December 2019, , Pages 932-940
Abstract
In program of increasing forage production in rangelands of the country, gathering and deepening knowledge of forage plants establishment is necessary. So seeds of Trifolium pratense species prepared from Sari city market and cultivated. The purpose of this study was to determine the optimal season and ...
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In program of increasing forage production in rangelands of the country, gathering and deepening knowledge of forage plants establishment is necessary. So seeds of Trifolium pratense species prepared from Sari city market and cultivated. The purpose of this study was to determine the optimal season and efficient method of species establishment for rangeland breeding in steppe rangelands. Experiment was performed in Posht-kooh water spreading station with 350 mm precipitation and semi-arid-cold climate. For this purpose, two sowing treatments including of seeding and seed spacing in two cultivation season of fall and spring, in split plot based on completely randomize block design in three repetitions were performed. Results indicated that there was a significant difference at (p<0.01) between the cultivation season and two cultivation methods. Germination and viability in fall season (39.11% germination, 13.83% viability) were more preferable to spring cultivation (30.06% germination, 11.83% viability). Seed cultivation in seeding (germination 39.22%, 14.78% viability) was also superior to seed spacing (29.94% germination, 10.89% viability). According to the obtained results, fall cultivation and seeding method were better than spring cultivation and seed spacing method. There is possibility of breeding rangelands in similar climatic and physical properties of the rangelands at the test site as well as fall cultivation and seeding method to increase forage production and direct grazing.
farhad Azhir; Naser Ansari; Valiollah mozafarian
Volume 12, Issue 1 , August 2019, , Pages 81-96
Seyed Taghi Mirhaji; Morteza Akbarzadeh; Farhad Azhir
Volume 25, Issue 1 , April 2018, , Pages 54-62
Abstract
Awareness of annual and monthly production of various rangeland types is essential for efficient management of rangelands. It would be achievement by determining the relationship between plant forage production and climatic variables affecting them especially rainfall which would make easier management. ...
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Awareness of annual and monthly production of various rangeland types is essential for efficient management of rangelands. It would be achievement by determining the relationship between plant forage production and climatic variables affecting them especially rainfall which would make easier management. Achieving this goal is facilitated by determining the relationship between the amount of forage production and climatic variables affecting it, especially rainfall, in rangelands. Firuzkuh rangelands were studied to determine the relationship between rainfall and shrub forage production during 2006-2010. For this purpose, the annual and monthly forage production was measured during plant growth season in research exclosure plots by clip and weigh method. Each plant species studied had a specific production during the grazing season in different years. Relationship between forage production and precipitation in periods of winter and spring as well as each month of winter and spring was estimated. Results showed that correlation between the forage production of study species and precipitation in different periods including crop year (0.06 - 0.42), winter and spring (0.01-0.23), March and spring (0.13 -0.35), March and May (0.06 – 0.45), February to June rainfall (0.13 – 0.40), was positive and reached its highest level in June (0.63 -0.94). A significant relationship was found between the forage production of Acantholimon erinaceum, Acanthophyllum spinosum, Astragalus gossypinus, Onobrychis cornuta and Thymus fedtschenkoi and June rainfall.
Taghi Mirhaji; Farhang Ghasriani; Farhad Azhir
Volume 23, Issue 2 , September 2016, , Pages 274-265
Abstract
This research was aimed to determine the best harvesting intensity for key and indicator species including Agropyron intermedium, Oryzopsis holciform, and Thymus fedtschenkoi in the cold semi steppe rangelands of Firoozkooh. Treatments consisted of different harvesting intensities of 25%, 50%, 75%, and ...
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This research was aimed to determine the best harvesting intensity for key and indicator species including Agropyron intermedium, Oryzopsis holciform, and Thymus fedtschenkoi in the cold semi steppe rangelands of Firoozkooh. Treatments consisted of different harvesting intensities of 25%, 50%, 75%, and control. In the first year, an area of one hectare was selected and fenced. From each of the above species, 40 average individuals were selected and each of the above treatments was applied on 10 individuals. The study individuals were distinguished by numbered signs and the harvesting was done manually by clipper. The data were analyzed in a split plot design in time and the means were compared using Duncan test. The results showed that the highest (24.59, 10.57, and 10.52 g) and the lowest (20.17, 9.91, and 5.78 g) yield were obtained at 25% and 75% harvesting intensities. According to the results of means comparison in different, the reduction of forage yield was affected by the harvesting intensity. The lowest (15.61, 8.59, 9.14 g) and highest (24.6, 10.8, 12.7 g) forage yield were recorded for the low-rain year (2008) and the wet year (2009), respectively. Therefore, a harvesting intensity of 25-50% could be recommended for the study species.
Taghi Mirhaji; Farhang Ghasryani; Farhad Azhir
Volume 22, Issue 1 , June 2015, , Pages 184-193
Abstract
This research was aimed to determine the allowable use of Bromus tomentellus, Festuca ovina and Stipa hohenackeriana in Firouzkooh rangeland during 2006 to 2010. Treatments included different harvesting intensities of 25%, 50%, 75% and control, performed on 40 medium-sized individuals of each species. ...
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This research was aimed to determine the allowable use of Bromus tomentellus, Festuca ovina and Stipa hohenackeriana in Firouzkooh rangeland during 2006 to 2010. Treatments included different harvesting intensities of 25%, 50%, 75% and control, performed on 40 medium-sized individuals of each species. Data were analyzed in a split plot in time design by SAS software and means were compared using Duncan. Results showed that the effects of treatment, year, and interaction effect of year*treatment were significant at 1% level of significance. In addition, the results of mean comparisons showed that the reduced forage yield was under the influence of harvesting intensities. In this regard, S.hohenackeriana and B.tomentellus were sensitive to drought while F.ovina was resistant to drought and more affected by the harvesting intensity. Our results clearly showed that a harvesting intensity of 25% and control treatment had no impact on the yield of species, leading to the reduced forage yield of the mentioned species. Therefore, an allowable use of 50% is recommended.