【摘要】 采用二次回归通用旋转组合设计,研究了优质玉米正红211在攀西地区的产量、效益与种植密度、施氮量、施磷量和施钾量的数学回归模型。结果表明:正红211的产量、效益与4个栽培因素均呈二次凸函数关系,各栽培因素之间存在两两互作效应。通过频数分析法得出了产量≥12000kg/hm2的优化栽培模式。讨论了正红211高产高效的优化栽培方案。更多还原

【Abstract】 Quadratic general regressive rotation designed with four factors, including planting density, nitrogen rate, phosphorus rate and potassium rate were conducted to study the cultivation models of high quality hybrid maize Zhenghong 211 for high yield and benefit in Panxi region. The results showed that the relationships between grain yield, as well as the net income and the four experimental factors were all quadratic protruding function. There were some interactions among the experimental factors. The optimizing cultivation models for both yield more than 12 000 kg/ha was calculated by the distributing frequency statistical method. It was found that there were some differences between the two optimizing cultivation models. The optimizing cultivation measures for high grain yield with high net income were discussed.更多还原