土壤养分类型与小麦最佳施肥比例及最大施肥量的关系

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。

Soil Nutrient Types and the Relationship between Optimum Application Ratio and Maximum Application Rate of Fertilizer for Wheat

The soil nutrient type, optimum application ratio and maximum rate of fertilizer application for wheat were conducted by field experiment. The trial showed that there existed balanced and unbalanced soil nutrient types and certain fertilization ratio. When wheat was grown in different types of soil nutrient situations, moreover, the total mount of N and P applied was heavily affected by the trial methods. The application Rate of N and P for maximum yield was determined by the trial under the condition of optimum application ratio of N and P and different application rates of N and P. If one treatment is approaching the maximum application rate and optimum application ratio of N and P, the trial result will be near to practical status.