【作者】 姜萍； 朱日恒； 戴耀文； 沈逸菲； 赵峥； 岳玉波； 赵琦； 曹林奎；

【Author】 JIANG Ping, ZHU Ri-heng, DAI Yao-wen, SHEN Yi-fei, ZHAO Zheng, YUE Yu-bo, ZHAO Qi, CAO Lin-kui (1.School of Agriculture and Biology, Shanghai Jiaotong University, Shanghai 200240, China; 2.Key Open Laboratory of Urban Agriculture. Ministry of Agriculture,Shanghai 200240, China)

【机构】 上海交通大学农业与生物学院； 农业部都市农业(南方)重点实验室；

【摘要】 采用测坑定位试验的方法研究不同灌溉条件下稻田系统氮素流失特征。结果表明:与常规淹灌(W1)处理相比,间歇灌溉(W2)处理和湿润灌溉(W3)处理可分别减少灌水量4.37%和8.88%、径流排水量35.74%和5.98%以及渗漏排水量2.01%和17.28%;整个水稻季,W1处理的总氮(TN)径流和渗漏流失负荷均为最高,分别为3.90、1.13kgN·hm2;与W1处理相比,较低的排水量导致W2处理和W3处理分别减少了52.01%、38.24%的TN径流流失,以及15.88%和42.06%的TN渗漏流失;在产量方面,W2处理和W3处理还分别提高了10.83%和5.46%的水稻籽粒产量。本研究表明节水灌溉不仅能有效控制稻田氮素流失,并在一定程度上提高水稻产量。更多还原

【Abstract】 A lysimeter experiment was conducted to reveal the effect of different water management on nitrogen loss in paddy fields. Three treatments were applied in this study: flooding irrigation (W1); intermittent irrigation (W2) and moistening irrigation (W3). The results suggested that compared to W1 treatment, the irrigation water of W2 and W3 was reduced by 4.37% and 8.88%, the surface runoff water was reduced by 35.74% and 5.98%, and leaching water by 2.01% and 17.28%. Because of the diminished surface runoff water and leaching water, The nitrogen surface runoff loss of W2 and W3 was reduced by 52.01% and 38.24% compared to that of W1, which possesses 3.90 kg N·hm-2 nitrogen surface runoff loss . The nitrogen leaching loss of W2 and W3 was lessened by 15.88% and 42.06% compared to 1.13 kg N·hm-2 loss of W1. In addition, the grain yields of W2 and W3 was increased by 10.83% and 5.46% compared to that of W1.更多还原