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应用氮磷等比和以磷定氮两种试验方案统一在同一试验中进行的设计方法,对施肥比例与最大施氮量的关系及氮磷养分的吸收利用进行了研究。结果表明,氮磷比例显著影响最高产量施氮量的试验结果,同时也显著影响氮磷养分的吸收和利用。氮磷等比条件下的最大施氮量范围内,玉米按比例吸收氮磷养分并有效转化,氮肥的利用率和生理利用率都比较高;而以磷定氮下土壤氮磷养分的不平衡供应则导致玉米对氮磷养分的不平衡吸收和转化,从而使玉米的产量水平降低。
The design methods of nitrogen and phosphorus ratio and phosphorus nitrogen determination were unified in the same experiment. The relationship between fertilization rate and maximum nitrogen application and the absorption and utilization of nitrogen and phosphorus were studied. The results showed that the ratio of nitrogen and phosphorus significantly affected the highest yield of nitrogen application test results, but also significantly affect the absorption and utilization of nitrogen and phosphorus nutrients. Nitrogen and phosphorus under the conditions of the maximum nitrogen application within the scope of the proportion of nitrogen and phosphorus in maize and efficient conversion and conversion, nitrogen utilization and physiological utilization rate is relatively high; and under nitrogen phosphorus and phosphorus soil nutrient imbalance The supply leads to an imbalanced absorption and conversion of maize to nitrogen and phosphorus nutrients, thereby reducing the level of maize production.