Study On Fertilization Effect Recommended By Nutrient Experts Of Winter Wheat And Summer Maize

In order to clarify the effect of nutrient experts recommended fertilization in winter wheat-summer maize rotation system,the scientific fertilization of winter wheat-summer maize rotation was realized.field experiments were conducted in hebi city and xinxiang city,henan province,from 2018 to 2020 to study the effects of nutrient experts recommended fertilization（NE）,application of slow controlled-release nitrogen fertilizer（RNE）farmer fertilization（FP）and local recommended fertilization（ST）on the yield,nutrient accumulation and transport,physiological characteristics,fertilizer utilization efficiency and soil nutrient balance of winter wheat-summer maize rotation system were studied.The main findings are as follows:1.The yield of winter wheat and summer maize was significantly increased by nitrogen,phosphorus and potassium fertilizer application,Based on nutrient experts recommended fertilization（NE,RNE）the annual nitrogen,phosphorus and potassium fertilizer increases by 29.29%,22.32% and 16.55% respectively.Winter wheat season,NE,RNE increased by 5.52%,7.49%,respectively,FP treatment of summer maize increased by 7.74% and 13.89% respectively.2018-2019,NE increased by 11.71%and 3.68%,respectively.The NE of 2019-2020 increased by 10.27% and 4.53%,respectively,there was no significant difference between NE and RNE.Nutrient experts recommend fertilization to have better effect than farmers’ fertilization.2.The utilization rate of nitrogen,phosphorus and potassium fertilizer for winter wheat was 41.42%,14.30% and 45.68%,Agricultural efficiency averaged 10.94,13.39 and 18.19 kg·kg^-1;The average utilization rate of N,P and K in summer maize was33.50%,14.73% and 34.28%,Agronomic efficiency averaged 13.33,24.78,and 24.46kg·kg^-1.for the annual rotation of wheat-corn,the average utilization rates of nitrogen,phosphorus and potash were 37.26%,14.54% and 39.12%,and the average agronomic efficiency was 12.21,18.78,22.20 kg·kg^-1.Nutrient experts recommend fertilization with high fertilizer utilization efficiency.3.The annual nutrient experts of winter wheat and summer maize rotation recommended that fertilization improve the soil nutrient content,the NE and RNE of alkali-hydrolyzed nitrogen content increased 10.28% and 10.58%,and the soil available phosphorus and available potassium content remained at the pre-sowing level.The annual rotation NE and RNE nitrogen,phosphorus and potassium are surplus from fertilizer input and nutrient output.Nutrient experts recommend that fertilization can increase soil nitrogen,phosphorus and potassium nutrient content and maintain soil nutrient balance.Nutrient experts recommended that fertilization optimize the ratio of nitrogen,phosphorus and potassium,promote the absorption and utilization of nitrogen,phosphorus and potassium nutrients in winter wheat and summer corn,increase the nutrient accumulation of nitrogen,phosphorus and potassium after flowering,improve the leaf structure,improve photosynthetic efficiency,maintain soil nutrient balance,and increase yield and fertilizer utilization efficiency compared with farmers’ fertilization.It can be popularized and applied in winter wheat-summer maize rotation system.