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The Effect of Humic Substances on Pomegranate Nursery Production in Nangarhar, Afghanistan
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作者 F. Sandor 《Journal of Environmental Science and Engineering》 2011年第2期214-226,共13页
The efficacy and reliability to use humic substances for increasing crop yields have not been widely established in the scientific literature. The aim of the research isto increase pomegranate cutting survival rate an... The efficacy and reliability to use humic substances for increasing crop yields have not been widely established in the scientific literature. The aim of the research isto increase pomegranate cutting survival rate and the number of quality saplings in nursery production through humic and fulvic acid application during the growing period. The application of humic substances in the pomegranate nursery resulted in a significant positive effect for the quality of the sapling increasing both diameter and height. The data about yield indicates that reducing fertilizer use is balanced by the humic acid through the increase of nutrient uptake by the plant. It also showed that organic matter decomposition and the mineralization processes in the soil increases. The humic substances also tend to regulate soil pH and soil salinity and help to retain organic matter in the surface layer, meanwhile the salt content is leaching out from the surface layer accumulating in the layers below. 展开更多
关键词 Humic acid nutrients availability nutrient uptake yield components soil physical and chemical characteristics soil pH and salinity.
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