水稻精确施氮研究

摘要

[Objective]The research aimed to determine the reasonable nitrogen amount and the application technology in rice main producing areas. [Method]Based on the investigation of rice yield,three fertility level was defined roughly. And the comparative trial of precise-using nitrogen was carried out. On the basis of Stanford formula,the nitrogen amount in the precise-using nitrogen area was calculated. [Result] Nitrogen fertilization index system of different target yield in different kinds of soil in Tongzhou District was established. [ Conclusion] The target yield and the actual yield were coincided basically, and the theoretical fertilizer requirement and actual fertilization amount were close.%[目的]为水稻主产区确定合理氮肥用量及其运筹技术.[方法]以水稻产量调查结果为依据,粗略划定高、中、低3个肥力水平,进行精确施氮对比试验,根据斯坦福公式计算精确施氮区氮肥用量.[结果]建立了通州水稻不同土壤类型、不同目标产量氮肥施用指标体系.[结论]目标产量与实际产量基本吻合,理论需肥量与实际施肥量相近.