基于模拟的作物氮素管理决策研究  

Management decision of nitrogen fertilization based on crop growth simulation

作　　者：庄恒扬[1] 曹卫星[1] 任正龙[2] 

机构地区：[1]南京农业大学农业部作物生长调控重点开放实验室,南京210095 [2]扬州大学农学院,扬州225009

出　　处：《农业系统科学与综合研究》2002年第4期269-272,共4页System Sciemces and Comprehensive Studies In Agriculture

基　　金：国家"8 63"计划项目 (863 -3 0 6-ZD0 5 -0 1-7);国家自然科学基金项目 (3 0 0 3 0 0 90 )内容

摘　　要：提出基于作物生长模拟的氮素管理播前决策和生育期中动态调控方法。播前决策的方法是根据有机肥种类、数量和氮化肥的数量和基追比拟定若干种施肥方案 ,由作物—土壤系统模拟模型计算在常年气候条件下各方案的产量、氮肥效率、硝态氮淋失量、土壤有机质变化 ,通过4个指标的综合评价确定播前决策优化方案。氮素动态调控采用时间激发或土壤矿质态浓度激发策略 ,提出了相应的追氮量计算方法。图 2 ,参 12。This paper deals with pre-sowing decision making of nitrogen fertilization and its dynamic adjustment during crop growing period based on the crop growth simulation model.The pre-sowing fertilization decision was made through the comprehensive evaluation of criteria such as crop yields,nitrogen fertilizer efficiencies,nitrate leaching amounts and soil organic matter contents of various fertilization plans computed by growth simulation under normal climate conditions.The time of dynamic nitrogen adjustment could be determined by program or critical soil mineral nitrogen content and the respective methods to calculate the nitrogen-dressing amount were put forward.

关 键 词：播前决策 动态调控 生长模拟 作物氮素管理系统 

分 类 号：S147.2[农业科学—肥料学] S126[农业科学—农业基础科学]