【摘要】 试验采用裂区设计,研究了不同施钾量的条件下,钾及钾锌配施对夏玉米生长发育及产量的影响。结果表明:单施钾肥增产553.0～2292.0kg/hm2,配施钾锌肥可增产1062～2692.5kg/hm2。经回归分析,单施和配施的最佳施肥量(K2O)分别为275.8kg/hm2和283.5kg/hm2。与单施钾肥相比,配施更能有效的促进夏玉米生长发育,增加次生根数,降低秃尖,改善穗部性状,提高抗病能力。更多还原

【Abstract】 The experiment accepted spilt plot design.At applied in various amounts of potassium,the experiment studied that single applying K and combined applying K-Zn fertilization effected growth and yield of summer maize.The result demonstrated that single and combined fertilization all could increase yield.The former increased553.0～2292.0kg /ha and the latter increased1062.0～2692.5kg /ha.By regression analysis,the optimal application quantity was potassium oxide275.8kg /ha and283.5kg /ha.In these aspects of growth,increasing secondary root,improving the characters of ear and improving disease resistance,the latter was better the former.更多还原