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.
Mohammad Jafari; ِAli Tavili; Yahya Esmaeilpour; Hossein Azarnivand; Mohammad Zare Chahouki; Hamid Reza Asghari
Abstract
Abstract In this study the effects and costs of application of two kinds of super absorbent polymer on the establishment and surviving of seedlings was investigated. Experiments were done in the field and on two kind of soil with different salinity (EC: 4.5 and 8 dsm-1). The results showed: the establishment ...
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Abstract In this study the effects and costs of application of two kinds of super absorbent polymer on the establishment and surviving of seedlings was investigated. Experiments were done in the field and on two kind of soil with different salinity (EC: 4.5 and 8 dsm-1). The results showed: the establishment rate of seedling in control was about 40 percent. The percentage of seedling establishment in the hydrogel treatments significantly increased and statistically is equal to the optimal surviving of the seedling (80%). Soil salinity on seedling establishment in the same treatments did not produce significant differences. The results were compared with a similar project to determine the costs and benefits. Based on the results a 30 percent reduction in water usage per round and 33 to 50 percent reduction in the number of irrigation replicate were recorded. The costs in compare to the normal project varied from -2 to 29 percent respectively for treatment Herbosorb® 0.5% and Aquasorb 1%. The treatments Herbosorb® and Aquasorb with usage level of 0.5% caused about 2.5 percent for each one percent increasing in the cost. There is no significant increase in the percentage of seedling survival by using 1% super-absorbent compared to 0.5 percent.
