【作者】 袁念念； 黄介生； 谢华； 黄志强；

【Author】 Yuan Niannian,Huang Jiesheng,Xie Hua,Huang Zhiqiang (State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University,Wuhan 430072,Hubei,China)

【机构】 武汉大学水资源与水电工程科学国家重点实验室；

【摘要】 通过在湖北荆州丫角排灌试验站进行暗管控制排水和自由排水对照试验,结果表明氮素流失量与排水量呈正相关;提高排水位可以减小排水量和氮素流失量,且不同排水位条件下减少量不同。暗管氮素累积流失量随时间呈二次曲线变化,累积排水量随时间呈线性变化。控制排水水位为30cm的田块累积排水氮素累积流失量增量随时间而增加,而其他控制排水处理及自由排水处理田块氮素累积流失量增量随时间而减少。更多还原

【Abstract】 A field contrasting experiment was set up in Drainage and Irrigation Experimental Station,Jingzhou Yajiao,Hubei.Results showed that there was a positive linear relationship between nitrogen loss and drainage.Rising drainage water table reduced drain outflow and nitrogen loss and different water table leaded to different reduction.Accumulation of nitrogen loss from pipe drainage fluctuated with time was of a conic curve and the R is larger than 0.95.Accumulation of pipe drain outflow fluctuated with time was of a line and the R is larger than 0.95.The increment of drain outflow accumulation from controlled drainage of 30cm increased with time and from other controlled treatments and free drainage treatment decreased with time.更多还原