| Assessment of farmland quality in the improvement process of mid-low yield lands under high water-fertilizer treatments in Huang-Hua-i Hai Plain |
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| DOI：10.7606/j.issn.1000-7601.2009.03.43 |
| Key Words: high water-fertilizer measure optimized fertilization mid-low yield lands farmland quality Huang-Huai-Hai Plain |
| Author Name | Affiliation | | YANG Jinsong | Institute of Soil Science Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China | | YU Shipeng | Institute of Soil Science Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China | | LIU Guangming | Institute of Soil Science Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China | | LI Dongshun | Institute of Soil Science Chinese Academy of Sciences, Nanjing, Jiangsu 210008, China |
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| Abstract: |
| In order to study the impacts of high water-fertilizer treatments widely used in the improvement process of mid-low yield lands in Huang-Huai-Hai Plain on the comprehensive farmland quality, field experiment was conducted in Fengqiu, Henan Province.By calculating field yield, sampling and testing soil and plant, the comprehensive quality dynamics of soil and crops under different treatments were analyzed, and the weights of advantages and disadvantages of each treatment were assessed.The results show that the treatments of optimized fertilization and high water-fertilizer were beneficial to the increasing of water absorption ability of crop root, to the increasing of the fertilizer N use ratio by crops, to the increasing of crop yield and quality, and to the decreasing of soil alkalescency.However, the hardening of farmland soil appeared because of using current fertilization methods, especially using high water-fertilizer measure. The treatment of high extent fertilizer in the program of optimized fertilization wasn't good for the soil salt leaching, which might cause secondary soil salinization.The high water-fertilizer measure wasn't good for the increasing of nutrient preserving capability of farmland soil.Based on different weights of advantages and disadvantages of each treatment, the measures of optimized fertilization and high water-fertilizer can be used as the leading technique to improve mid-low yield lands and to increase crop yield and crop quality.Meanwhile, measures for preventing secondary soil salinization and for increasing soil fertility and scientific cultivation measures have to be combined and used to eliminate the disadvantages of high water-fertilizer measure and to increase the comprehensive farmland quality. |
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