【摘要】 研究证明,土壤养分耗损后至少存在平衡与不平衡土壤养分类型,两种土壤养分类型种植玉米,均以氮磷配合施用效果最佳,且存在特定施肥比例,平衡类氮磷施用比例以1∶1较佳,不平衡类氮磷施用比例为1∶0.667。更多还原

【Abstract】 The study showed that there were two types of soils after nutrients were depleted in soil. When maize was planted in the two types of soil, there existed a specific fertilization application ratio,When by N and P fertilized together.For balanced soil, the optimum application ratio of N and P was 1:1,while for unbalanced soil the optimum ratio was (1:0.667.)更多还原