Shahram Yousefi Khanghah; Hossein Azarnivand; Mohammad Ali Zare Chahouki; Mohammad Jafari; Hamidreza Naseri
Abstract
The establishment of vegetation is the best way to manage degraded and at risk of degradation lands. Considering that the planting in arid lands is very costly because of ecological restrictions, so experts are looking for methods that increase the percentage of the seedlings establishment and reduce ...
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The establishment of vegetation is the best way to manage degraded and at risk of degradation lands. Considering that the planting in arid lands is very costly because of ecological restrictions, so experts are looking for methods that increase the percentage of the seedlings establishment and reduce the cost of planting, in this regard the correct use of amendments is very important. The study area is located in Nazarabad City in southwest of Alborz province. In this study, the amendments including mineral biochar, arbuscular mycorrhiza fungi and acrylic resin polymer each in four levels were used at the base of Nitraria schoberi seedlings. The soil characteristics of the area was determined at the start of planting. After one year with counting the number of live seedlings, the percentage of establishment for each treatment was calculated. Economical estimates were calculated based on cost-benefit and calculated separately for each treatment. The results showed that there was a significant difference at the 5% level between the amendments and the control. Mycorrhizae had the highest (70%) and the control and biochar 4 treatments had the least (40%) percent of establishment. Economically, mycorrhizal 2, polymer 2 and biochar 1 treatments were the most optimal treatments for each amendment, respectively. The used amendments had different effects on the establishment of seedlings, so that the percentage of establishment increased with increasing level of mycorrhiza use, but with increasing level of polymer and biochar use, negative effects were observed and the percentage of seedling establishment decreased.
Esmaeil Sheidai Karkaj; Esfandiar Jahantab; Zahra Mahmoodi
Abstract
Plant growth and yield in the environment is affected by numerous biotic and abiotic environmental stresses as well as seed dormancy. The aim of the present study was to investigate the effect of seed washing treatments with sulfuric acid and irrigation of seeds with saline water on seed germination ...
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Plant growth and yield in the environment is affected by numerous biotic and abiotic environmental stresses as well as seed dormancy. The aim of the present study was to investigate the effect of seed washing treatments with sulfuric acid and irrigation of seeds with saline water on seed germination of Zygophyllum fabago. According to previous relevant researches, for this purpose, three concentrations of 0, 10 and 20% were prepared for acid washing treatment. For salinity treatment, four levels were considered: 0, 60, 90 and 120 mmol / l. Irrigation with spray water was applied evenly on all pteridia when necessary. Germinated seeds were counted daily and continued until no increase in the number of germinated seeds was observed .Comparison of the mean of the main effect of different levels of acid treatment on the germination percentage of Z. fabago showed that zero and ten percent acid concentration treatments with 59 and 60 percent have a higher value. Regarding the comparison of the mean of the interaction effects of acid and salinity, the results showed that the best treatment combination is zero percent acid and zero salinity of ten and ten millimoles per liter. Therefore, Z. fabago species needs low concentrations of salinity and sulfuric acid for optimal growth. Therefore, it can be used to improve and rehabilitate rangeland ecosystems according to the salinity of the area.
Morteza Saberi; Alireza shahriari; Marziyeh bozorgmehr
Abstract
An experiment was performed aimed to investigate the effects of priming and salinity on germination and seedling growth of Stipagrostis plumose in factorial test and completely randomized design with four replications in laboratory condition. The first factor was priming consist of salicylic acid with ...
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An experiment was performed aimed to investigate the effects of priming and salinity on germination and seedling growth of Stipagrostis plumose in factorial test and completely randomized design with four replications in laboratory condition. The first factor was priming consist of salicylic acid with three levels (100, 200 and 300 mg/l), gibberellic acid with three levels (125, 250 and 500 ppm), ascorbic acid with three levels (100, 200 and 300 mg/l), and water as control, and the second factor was salinity treatment in six levels (0, 0.2, 0.4, 0.8, 1.2, 1.6 m/l). The measurement characteristics were speed of germination, percent of germination, root length, shoot length, seedling length and seed vigor. Results indicated that salt stress had inhibitive effect on germination and early seedling growth of S. plumosa. All chemical stimulators increased the germination characteristics of this plant. Also, the interaction of the tested treatments showed that gibberellic acid 250 ppm has the highest effect on improvement of germination characteristics under all levels of salinity stress. We conclude that priming seeds by gibberllic acid can increase resistance the germination of S. plumosa in areas prone to salinity.
Mojtaba Piri; Alireza Khavaninzadeh; Hamid Sodaeizadeh
Abstract
Effect of Salicylic acid as a pre-treatment, on germination indices of Foeniculum vulgare Mill, Cynara scolymus L. and Nigella sativa under salinity stress was evaluated by a factorial arrangement in a completely randomized design with four replications. Salicylic acid and salinity were considered in ...
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Effect of Salicylic acid as a pre-treatment, on germination indices of Foeniculum vulgare Mill, Cynara scolymus L. and Nigella sativa under salinity stress was evaluated by a factorial arrangement in a completely randomized design with four replications. Salicylic acid and salinity were considered in 4 levels (0, 0.5, 1 and 2 mM) and (0, 50, 100 and 200 mM) respectively. The results showed that salinity and pre-treatment of salicylic acid significantly affect all indices of germination of three species. Results showed increasing salinity led to decreasing the most measured germination traits. Pre-treatment with salicylic acid improved all germination indices under salinity stress conditions compared to control seeds for all three species and resistant to salinity is decreased in Cynara scolymus L. Foeniculum vulgare Mill, and Nigella sativa respectively. The highest percentage ( more than 96%) and rate of germination in Cynara scolymus was observed at levels of 0.5 and 1 mM salicylic acid ( more than 3.4 n/day). The most improvement of germination traits in Cynara scolymus L., and Nigella sativa was observed at pretreatment 0.5 and 1 mM and for Foeniculum vulgare at 1 mM. Therefore, it can be concluded that the use of salicylic acid as a pre-treatment improves the germination traits of Artichoke, Corn cockle and Fennel under salinity stress at different concentrations.