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采用正交试验研究了不同灌溉、施肥方式和N肥用量对稻田N素径流和渗漏损失及生产效益的影响。结果表明,采用间歇和湿润灌溉可减少N素损失,提高粮食产量和效益;改进施肥方式可少量降低N素损失,而对产量收益影响不大;N肥施用量是影响N素损失和产量收益的首要因素,适当减少N肥用量,既可减少稻田N素损失,又可提高生产效益。并推荐了较优化的稻田水肥管理综合措施。
The effect of different irrigation and fertilization modes and N fertilizer on N runoff and seepage loss and production efficiency of paddy field was studied by orthogonal test. The results showed that using intermittent and humid irrigation could reduce N loss and improve grain yield and benefit. The improvement of fertilization mode could reduce N loss slightly, but had little effect on yield and yield. N fertilizer application had the effect of N loss and yield Of the first factor, appropriate to reduce the amount of N fertilizer, not only to reduce N loss of paddy fields, but also improve production efficiency. And recommended a more comprehensive management of paddy water and fertilizer management.