【摘要】 采用四元二次正交回归旋转组合设计方法,分析杂交玉米黔单21的主要栽培因子即种植密度、N、P、K肥施用量对其产量的影响。结果表明,各因子对产量影响的顺序为:种植密度>K2O施用量>N施用量>P2O5施用量;经模拟寻优分析,初步筛选出该品种产量超过700 kg/667m2的主要农艺措施方案:种植密度为3 414~3 573株/667m2,纯氮用量21.97~27.81 kg/667m2,P2O5用量5.89~16.56 kg/667m2,K2O用量8.19~10.11 kg/667m2。更多还原

【Abstract】 The quaternary quadric rotational combination design was used to study the effect of density and fertilizing amount of N,P and K on Qiandan 21.The results showed that the factors affecting maize yield was density>K2O>N>P2O5,and the main agronomic measures for yield more than 700 kg/667m2 include 3 414~3 573 plants/667m2,21.97～27.81 kg/667m2 pure N,5.89~16.56 kg/667m2 P2O5 and 8.19~10.11 kg/667m2 K2O.更多还原