| The effect of gypsum improver based on Na+ concentration in soil |
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| DOI：10.7606/j.issn.1000-7601.2016.01.44 |
| Key Words: saline-alkali soil gypsum ameliorant water and salt transfer soil bulk density economic |
| Author Name | Affiliation | | LUO Xiao-dong | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | WANG Quan-jiu | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China | | TAN Shuai | Institute of Water Resources, Xi'an University of Technology, Xi'an, Shaanxi 710048, China |
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| Abstract: |
| Influence of gypsum on soil salt distribution and crop production was analyzed in this research based on sodium ion content in soil, allowing a reasonable application of gypsum. Our results showed that when the application of gypsum was 200% of the sodium ion content in soil, soil bulk density could be lowered by about 14.44%. In addition, when the application of gypsum was 200% and 300% of the sodium ion content in soil, water content could be increased by about 5.94% and 6.21%, respectively. Moreover, when the application of gypsum was 200% and 300% of the sodium ion content in soil, conductivity of soil desalination was enhanced, resulting in desalination rates at 14.1% and 13.6%. Furthermore, each treatment increased stem diameter and yield of cotton. Among all treatments, 200% of the sodium ion content in soil was the best. Also, when the applications of gypsum were 100%, 200% and 300% of the sodium ion content in soil, the economic benefits for farmers could be increased by 108, 263 yuan·667m-2 and 148 yuan·667m-2. However, when the application of gypsum was 350% of the sodium ion content in soil, the economic benefit for farmers was rather reduced by 44 yuan·667m-2. |
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