甘肃中部半干旱雨养生态区甜荞麦施肥优化数学模型研究  

Mathematical model of optimal fertilization for sweet buckwheat in semiarid rain-fed region in central Gansu

作　　者：马宁[1] 刘杰英[1] 贾瑞琳[1] 魏立萍[1] 陈富[1] 

机构地区：[1]甘肃省定西市旱作农业科研推广中心,甘肃定西743000

出　　处：《干旱地区农业研究》2010年第6期108-111,共4页Agricultural Research in the Arid Areas

基　　金：甘肃省"陇原青年创新人才扶持计划"人选资助项目;国家科技支撑计划项目(2006BAD02B06-05)

摘　　要：采用二次通用旋转组合设计,研究了甜荞麦产量、纯收益与N、P、K施用量之间的关系,建立了以产量和纯收益为目标的函数模型,解析了各因子对产量和纯收益的主效应及互作效应,通过寻优计算,提出产量高于3 000 kg/hm^2的优化施肥方案为施氮量152.5-180.8 kg/hm^2,施磷量139.1-172.0 kg/hm^2,施钾量91.6-133.4kg/hm^2;纯收益大于2 250元/hm^2的优化施肥方案为施氮量156.5-191.5 kg/hm^2,施磷量76.3-148.7 kg/hm^2,施钾量2.9-20.2 kg/hm^2。A function model for yield and net income were established by using quadratic general rotary unitized design.The relation of yield and net income of sweet buckwheat and application amount of N,P and K were studied.The main and interaction effects of each factor on yield and net income were analyzed.The optimization calculation indicated that the optimum fertilizing scheme for yield over 3 000 kg/hm^2 was nitrogen application of 152.5～180.8 kg/hm^2,phosphorus application of 139.1～172.0 kg/hm^2 and potassium application of 91.6～133.4 kg/hm^2,and the optimum fertilizing scheme for net income over 2 250 yuan/hm^2 was nitrogen application of 156.5～191.5 kg/hm^2,phosphorus application of 76.3～148.7 kg/hm^2 and potassium application of 2.9～20.2 kg/hm^2.

关 键 词：甜荞麦 优化栽培 施肥方案 数学模型 

分 类 号：S517[农业科学—作物学] S147.21