关键词: 鲁南地区, 鲁南地区, 主成分分析, 相关性分析, 青贮玉米

Abstract: To explore the reasonable reduction measures of phosphate fertilizer in current soil phosphorus surplus pool in China, the typical winter wheat-summer maize rotation system in North China is taken as the research object, and the concept of annual phosphorus fertilizer utilization rate is introduced to comprehensively study the effects of phosphorus reduction combined with annual coordination measures on annual phosphate fertilizer use efficiency and yield in fields with different phosphorus contents. The results showed that in the high phosphorus soil, the annual phosphorus fertilizer utilization rate of the integrated phosphorus application measures could be increased from 7% to 16.6%, the annual phosphorus nutrient partial productivityincreasedfrom66kg/kgto130kg/kg,andthephosphateagronomicefficiencyincreasedfrom 5.5kg/kg to 8.9 kg/kg; in the medium phosphorus soil, the annual phosphate fertilizer utilization rate increased from 11.4% to 23.8%, the annual phosphorus nutrient partial productivity increased from 57 kg/kg to 112 kg/kg, and the agronomic efficiency of phosphate fertilizer increased from 10.8 kg/kg to 20 kg/kg. Therefore, under the current situation of soil phosphorus surplus in North China, the reduction of co- ordinated phosphorus application can greatly improve the utilization efficiency of phosphate fertilizer, and ensure the production of the two crops of winter wheat and summer maize.