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《Journal of Irrigation and Drainage》 2017-09
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Types of Fertilizers and Their Application Affect the Leaching of Nitrogen and Phosphorus in Paddy Fields in Irrigation Districts of Yellow River

LIU Ruliang;WANG Fang;ZHANG Aiping;LI Youhong;CHEN Chen;HONG Yu;YANG Zhengli;Institute of Agricultural Resources and Environment, Ningxia Academy of Agro-forestry Science;Agricultural Clean Watershed Innovation Team, Key Laboratory of Agriculture Environment and Climate Change,Ministry of Agriculture, China Institute of Environment and Sustainable Development in Agriculture,China Academy of Agricultural Science;  
Experiments were conducted in this paper aimed to reduce the leaching of contaminants from the paddy fields in Yellow River Irrigation Districts under different fertilizations after the water receded. The results showed that compared with conventional fertilization, optimized fertilization and fertigation on"side-strip"could significantly reduce TN concentrations in the surface and receding water. Under the side-strip fertilization, the TN concentrations in the surface and the receding water were only 47.4% and 34.3% of those under conventional fertilization. There was no significant difference in TP concentration in the surface water and receding water between all treatments. The optimized fertilization and side-strip fertilization did not considerably reduce the rice yield after reducing the fertilizer application. Organic farming reduced the yield by 26.5% compared with the conventional treatment. Considering yield and impact on environment, the optimized fertilization and side-strip fertilization are environmental friendly in the Yellow River Irrigation areas.
【Fund】: 宁夏农林科学院科技创新先导资金项目(NKYJ-15-05);; 水体污染控制与治理重大专项(2014ZX07201-009);; 宁夏科技支撑计划项目;; 宁夏环保科技项目;; 宁夏农业综合开发办公室项目
【CateGory Index】: S511
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