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| Study on the Nitrogen Loss from Paddy Fields on Different Water Management |
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| KeyWord:lysimeter; intermittent irrigation; moistening irrigation; nitrogen loss; runoff; leaching |
| Author Name | Affiliation | | JIANG Ping | School of Agriculture and Biology, Shanghai Jiaotong Universit | | YUAN Yong-kun | Water Management Bureau of Qingpu District | | ZHU Ri-heng | School of Agriculture and Biology, Shanghai Jiaotong Universit | | DAI Yao-wen | School of Agriculture and Biology, Shanghai Jiaotong Universit | | SHEN Yi-fei | School of Agriculture and Biology, Shanghai Jiaotong Universit | | ZHAO Zheng | School of Agriculture and Biology, Shanghai Jiaotong Universit | | YUE Yu-bo | School of Agriculture and Biology, Shanghai Jiaotong Universit | | ZHAO Qi | School of Agriculture and Biology, Shanghai Jiaotong Universit | | CAO Lin-kui | School of Agriculture and Biology, Shanghai Jiaotong Universit |
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| Abstract: |
| A lysimeter experiment was conducted to reveal the effect of different water management on nitrogen（N） loss in paddy fields. Three treatments were applied in this study：flooding irrigation（W1）; intermittent irrigation（W2） and moistening irrigation（W3）. Our results suggested that compared to W1 treatment, the irrigation water of W2 and W3 was reduced by 4.37% and 8.88%. Meanwhile, the surface runoff water of W2 and W3 was reduced by 35.74% and 5.98%, and leaching water by 2.01% and 17.28%. In W1 treatment, 11.69 kg N·hm-2 and 3.40 kg N·hm-2 nitrogen lost through runoff and leaching separately. However, because of the diminished runoff and leaching water, the nitrogen loss of W2 and W3 was reduced by 52.01% and 38.24% through runoff, and 15.88% and 42.06% through leaching：In addition, the grain yields of W2 and W3 was increased by 10.83% and 5.46% compared to that of W1. |
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