Study on 3414+2 Field Fertilizer Efficiency of Spring Maize in Funing County

Based on the production and yield of maize in Funing County,using 3414+2 fertilizer test design scheme,the effects of different ratio of N,P and K,single application of organic fertilizer,and formula fertilizer on increasing the yield of spring maize under different soil nutrient conditions were studied in Funing.Based on the relationship between maize yield and fertilizer amount,the fertilizer model was established,and the maximum fertilizer application amount and the optimum one were calculated using the fertilizer model.The results showed that the yield with chemical fertilizer application was higher,it increased by 11.0%-39.1%,it increased least with N0P2K2,while it increased greatest with N2P3K2.With medium N and P level,33.75-123.75 kg/hm2 K had little influence on the yield.Without P and K,N and P lower than the medium level,the yield increasing was less.The fertilization strategy should be adjusted based on the fertility level including increasing application of N and P and reducing application of K in high-yield field,stable application of N and reducing application of P and K in medium-yield field,and increasing application of N and reducing application of P and K in low-yield field.The application amount of N,P2O5 and K2O in low-yield field was 129.4 kg/hm2,47.7 kg/hm2 and 35.2 kg/hm2,respectively,that in medium-yield one was 173.2 kg/hm2,55.8 kg/hm2 and 49.7 kg/hm2,respectively,and that in high-yield one was 269.0 kg/hm2,178.5 kg/hm2 and 66.8 kg/hm2,respectively.The chemical fertilizer should be used with organic fertilizer.The yield could be increased significantly with formula fertilizer,which increased by 35.9%.