Ali Mohebbi; Moslem Mozafari; Ehsan Zandi Efahan; Ali Ashraf Jafari
Volume 26, Issue 3 , September 2019, , Pages 543-550
Abstract
A significant area of the country's rangelands is degraded due to various factors and an important part of rangeland species is endangered or their population is severely reduced. Rangeland improvement and reclamation through selecting suitable species and finding the best cultivation methods are of ...
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A significant area of the country's rangelands is degraded due to various factors and an important part of rangeland species is endangered or their population is severely reduced. Rangeland improvement and reclamation through selecting suitable species and finding the best cultivation methods are of utmost importance in these rangelands. Therefore, according to the results of the research project performed in the Research Institute of Forests and Rangelands, the seeds of Sa.arbuscula were collected from different rangelands of Semnan province along with the existing populations. The study was conducted in a randomized complete block design with three replications at Semnan Research Station since 2011 for five years. The data were analyzed using SAS software and the means were compared with Duncan's test. Our results clearly showed that among the study accessions of Sa. arbuscular, the genotypes 230 and 234 with an establishment percentage of 86.67% and 84.02% were superior, respectively. Therefore, the genotypes 230 and 234 could be recommended for rangeland improvement and reclamation.
Daryoush Ghorbanian; Ehsan Zandi Esfahan; Farzaneh Bahadori
Volume 26, Issue 2 , July 2019, , Pages 340-351
Abstract
The present study was aimed to determine the potential of bioethanol production in three halophytes: Suaeda vermiculata, Halocnemum strobilaceum and Seidlitzia rosmarinus. The plant sampling was performed in three vegetative, flowering and seeding stages to measure the content ...
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The present study was aimed to determine the potential of bioethanol production in three halophytes: Suaeda vermiculata, Halocnemum strobilaceum and Seidlitzia rosmarinus. The plant sampling was performed in three vegetative, flowering and seeding stages to measure the content of cellulose, hemicellulose and lignin. Their biomass production was calculated at the end of annual growth. The results were analyzed in a randomized complete block design with three replications. The results showed that the content of lignin in the Ha.strobilaceum was more than cellulose and hemicellulose at seedling stage; therefore, it does not have the potential to produce ethanol. However, in the vegetative and flowering stages, the amount of hemicellulose increased, indicating a little potential for ethanol production.In Se.rosmarinus, due to an increase in cellulose and hemicellulose percentage compared to lignin, it has high potential for bioethanol production; however, its biomass production is less than the other two. In Su.vermiculata, the percentage of cellulose and hemicellulose is higher than lignin percentage, so it has the greatest potential for bioethanol production. The best harvesting time for bio-ethanol extraction is before flowering stage. Its biomass production is higher than the two other species (1174 kg / h); thus, following some basic principles of agriculture, it could be established on a large scale for massive production. Therefore, Su.vermiculata is a suitable species for bioethanol extraction in saline and low-yielding lands. Due to its presence on the margins of farms and rangelands of arid and saline areas such as southern Garmsar and south of Varamin, it is recommended to be introduced to farmers and experts in the field of agriculture and natural resources.