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在同一试验中采用以氮定磷和氮磷等比条件下同步增加氮磷用量的方法,对土壤养分类型与小麦最佳施肥比例和最大施肥量进行了田间试验。试验表明,不同养分类型的土壤种植小麦,均存在平衡与不平衡土壤养分类型和特定的最佳施肥比例,而小麦最大氮磷施用量严重受试验设计方法的影响。田间试验以最佳氮磷施肥比例条件下同步增加用量设计方法确定的最大氮磷用量较为准确,而以氮定磷的试验方法只有其中有一个处理的施肥比例和用量接近小麦最大氮磷用量的情况下,试验结果才接近实际情况。
In the same experiment, field experiments were carried out to increase the amount of nitrogen and phosphorus simultaneously under the conditions of N, P, N and P. The field experiments were conducted on the types of soil nutrients, the optimal proportion of wheat fertilization and the maximum fertilization rate. The results showed that both the balanced and unbalanced soil nutrient types and the specific optimal fertilization rate existed in wheat cultivated under different nutrient types. However, the maximum nitrogen and phosphorus application rate in wheat was affected by the experimental design method. In the field experiment, the maximum nitrogen and phosphorus dosage determined by the simultaneous and incremental dosage design method under the optimal ratio of nitrogen and phosphorus fertilization was more accurate. However, only the fertilization rate and the dosage of one of them were close to the maximum nitrogen and phosphorus content of wheat In the case, the test result is close to the actual situation.