【摘要】 用二次回归旋转组合设计研究了基本亩数（X₁）、基苗氮肥（X₂）、孕穗期氮肥（X₃）、过磷酸钙（X₄）和氯化钾（X₅）用量对小麦籽粒蛋白质含量的影响．结果表明，X₄、X₁和X₂对蛋白质含量有显著作用，因素之间存在着复杂的互作效应．利用计算机模拟选优，获得了本试验条件下蛋白质含量大于13％的5个农艺因素组合方案，X₁=172.35～186.75万／ha；x₂=116.6～123.6kg／ha；x₃=33.75～39.15kg／ha；x₄=333.9～448.8kg／ha；x₅=190.65～233.10kg／ha．更多还原

【Abstract】 The effect of plant density （x₁）、N rate applied before sowing and at seedling stage （x₂）,N rate applied during booting stage （x₃）、applied superphosphate rate （x₄） and potassium chloride rate （x₅） on protein content （PC）) in wheat grain was investigated in commonly used、rotational and combinatoral design of quadratic regression.The results showed that x₄、x₁ and x₂ have significant effect on PC,and that there is complex interaction among the studied agronomic factors in their action on PC.The optimized agronomic scheme for higher than 13% of PC was obtained through simulation and optimization by using regression equation of PC and agronomic factors on computer.更多还原