Salahaddin Zahedi; Farhang Ghasriani; Mina Bayat
Volume 27, Issue 4 , December 2020, , Pages 712-721
Abstract
Nine accessions of Elymus libanoticus was planted at Baharestan Agricultural Research Station and evaluated in order to nominate of the best accessions in terms of adaptability and establishment. The experiment started in 2010 and continued to 2015. For each accession adequate seed of different stocks ...
Read More
Nine accessions of Elymus libanoticus was planted at Baharestan Agricultural Research Station and evaluated in order to nominate of the best accessions in terms of adaptability and establishment. The experiment started in 2010 and continued to 2015. For each accession adequate seed of different stocks in whole of the province was reaped. In reproduction phase (2010 autumn) and after soil preparation, all accessions were planted on plots with 5*6 m2, with 50cm spacing of planting line and planting points and 3cm of planting depth. At this stage weeding, and three irrigation times were performed. In the summer of 2011 mature seeds of grown accessions harvested and re-cultivation of seeds that were not green in the first stage was carried out. In 2011 and 2012autumn, the accession of each species based on complete randomized block design with 3 replications and 2 meter intervals on 2*4 m2 plots and 4 lines with 4-meter length and 50 cm intervals (In order to elimination of marginal effects) and 3 cm of planting depth planted as rainfed. The measured traits for plant selection were 1) growing 2) flowering 3) seeding 4) Yield 5) canopy cover 6) height and 7) regrowing, all data were statistically compound analyzed by SPSS and averages were compared using Duncan method. Results showed that there were significant differences among the measured traits and accessions (P≤0.05) in all studied years (2012-2015). In terms of measured parameters for all accessions of Elymus libanoticus, Iranshah and Chakhelo accession, respectively showed superiority and minority in the Baharestan research station conditions. In addition to the difference in genotypic power and the amount of precipitation that mentioned in previous studies as the only limiting factors of growth and propagation, Variable factors such as altitude from sea level, depth of soil and geographic direction of collecting areas of different accessions are factors influencing the establishment and adaptation of rangeland species in the site of cultivation and have the most effect on the performance of different accessions. So, it seems that zoning of areas is necessary for seed reproduction in order to improve the rangelands, and the use of extras in each area is necessary for replanting and planting in the same area.
Ali Mohebbi; Naser Arabzadeh; Ali Ashraf Jafari; Ehsan Zandi Esfahan; Alireza Eftekhari
Volume 25, Issue 2 , August 2018, , Pages 335-343
Abstract
A large surface area of rangelands in Iran is degraded due to some different factors such as overgrazing, climate-change and so forth. Therefore, an important part of rangelands species is endangered. Rangeland improvement and rehabilitation as well as introducing tolerant species ...
Read More
A large surface area of rangelands in Iran is degraded due to some different factors such as overgrazing, climate-change and so forth. Therefore, an important part of rangelands species is endangered. Rangeland improvement and rehabilitation as well as introducing tolerant species are of utmost importance towards rangeland sustainability. For this, the seeds of different accessions of most important perennial shrubs were collected from the rangelands in Kerman province and cultivated in the research station of Kerman province. A study was conducted in a randomized complete block design with three replications under field conditions, to comparing the germination and establishment of the accessions. Data analysis was performed using SAS software and mean comparisons were made by Duncan's multiple range test. According to the results, Fortuynia bungei showed a better germination and establishment rate as compared with other species. In addition, among the accessions, the highest establishment percentage was recorded for Kouhpayeh (53.03%) and Bam (52%) populations.