【摘要】 采用三因素二次通用正交回归旋转试验方法，研究了种植密度、施氮、施钾对春玉米产量的作用及其影响。结果表明施钾＞施氮＞种值密度；在密度55200株／hm2和70700株／hm2、施氮218kg／hm2和165kg／hm2、施钾128kg／hm2和110kg／hm2的条件下，可分别获得大面积高于600gkg／hm2和6750kg／hm2的产量。更多还原

【Abstract】 An orthogoual rotation and combimational design of guadraticregression was emyloyed to study the yield of spring maize under differenteffects of transplanting density, nitrogen and potassium application rate. Theresults showed that potassium application had the greatest effect on yield,followed by nitrogen application rats, transplanting density. Under the conditions of 55200, 70700seedlings/hm2 80wn to maize. applying nitrogen fertilizer of218, 165kg/hm2 and potassium fertilizer of 128, 110kg/hm2, there was resyectivelyfor getting a yield over 6750kg and 6000kg per lectare.更多还原