栽培因子对风沙土区小麦产量的数学模型研究

采用二次回归正交旋转组合设计,研究了松嫩平原西部风沙土区小麦籽粒产量与密度、氮肥、磷肥、钾肥四因素的定量关系,建立了产量形成的密度、肥料反应模型,解析了各因素对总产量的主效应及互作效应,寻求定量生产水平下的最佳农艺措施,为松嫩平原风沙土区小麦栽培提供科学依据。试验结果表明,风沙土区小麦高产栽培措施为:密度822.75万～876.45万株/hm2,氮肥(N)129.10～144.05kg/hm2,磷肥(P2O5)116.92～127.88kg/hm2,钾肥(K2O)68.28～78.30kg/hm2,之间的交互作用为正效应,适量增加氮磷肥施用量有助于产量的提高。

Study on the Mathematics Models of Cultural Factors on Wheat Yield in the Wind-sand Region

The relationship between wheat yield in the wind-sand soil region in the west part of Songnun plain with cultural factors, such as density, (nitrogen), phosphorus and potassium fertilizers were studied, and a (mathematical) model (involving) the four factors and wheat yield was established by using the orthogonal rotation design. The effects of (individual) factor and their (interactions) on yield were determined and the optimum (agronomic) practices in certain conditions were simulated by analyzing the model. The optimum comprehensive practices of high yield in wind-sand soil area were, density of 8227500~8764500 plants per hm~2, N 129.10~(144.05) (kg/hm~2), P_2O_5 116.92~127.88 kg/hm~2, K_2O 68.28~78.30 kg/hm~2, and the (interaction) of amount of N and P was positive.