Study On Optimized Fertilization,Irrigation And Pesticide Use In High-yield Wheat-maize Cropping Systems

Investigation of the basic data were collected on fertilizer,irrigation and drug use in the process of grain production in the northern wheat-maize rotation high-yielding areas(Anyang,Hebi,Xinxiang,Jiaozuo)in northern Henan.To ensure the high yield of grain under the premise of the input elements to optimize the input of the elements of the optimal input value range,to save agricultural production resources,protect the ecological environment plays an important role,but also for agricultural production to provide scientific policies and recommendations The main conclusions of this study are as follows:(1)The highest yield of wheat in the study area was 750 kg/mu,the lowest yield was 350 kg/mu,the average yield was 556.85 kg/mu;the highest yield of maize was 800 kg/mu,the lowest yield was 350 kg/mu,with an average yield of 604.24 kg/mu.In wheat and corn planting area,most of the planting area has achieved high yield of grain,only a small portion of planting area of grain yield was low.(2)Fertilizer input:(1)The best times of fertilizer were 2 times on wheat and maize.(2)The optimum fertilizer rate of N,P2O5 and K2 O were 15-25 kg/mu,20 kg/mu and 2-4 kg/mu;maize nitrogen,phosphorus and potassium fertilizers were 25-30 kg/mu,10-15 kg/mu and 4-6 kg/mu;(3)The optimized coefficients of nitrogen,phosphorus and potassium fertilizers were-5.88%,45.27% and 13.13%,respectively.The optimized coefficients of nitrogen,phosphorus and potassium were-27.89%,133.71% and-122.08%,respectively.(3)In terms of irrigating input:(1)the number of irrigationere2-3 times on wheat and maize,and the optimal irrigation times were 2 times compared with the effect of irrigation times on grain yield.(2)The optimal irrigation amount of wheat and maize was 120-180 m3/mu,80-160 m3/mu,respectively,under the different grain yield and and different irrigation yield.(3)The optimization coefficient of irrigation was-27.43%,and the optimized coefficient of maize irrigation was 19.71%.(4)Pesticide investment:(1)farmers on the number of wheat and corn medication for 2-3 times,the number of times in the comparison of the impact of the number of food production,wheat,corn,the optimal number of times were 2 times and 3 times.(2)The optimum dosage of wheat herbicide,insecticidal insecticide and growth regulator were ?40 ml/mu,150-200 ml/mu and ?40 ml/mu;maize herbicide,insecticide And the optimal dosage of the growth regulator are 50-100 ml/mu,100-150 ml/mu and ? 50 ml/mu,respectively.(3)The optimized coefficients of 80.07%,-21.12% and 76.46%,respectively,of corn herbicide,insecticidal insecticide,insecticidal agent and growth regulator were 80% Respectively-0.95%,-0.1% and 53.46%.