Study on the Combined Application Technique of Fertilizers for Summer Maize in Huaibei Area

[Objective]The aim was to discuss the fertilization technique for high quality and high yield of summer maize that was suitable in Huaibei area.[Method]With the main planting maize variety Zhengdan 958 in Huaibei area as the tested material,the 10 treatments of NPK fertilizer with different application amounts were set up during the growth stage to study the effect of NPK fertilizer management on the yield, quality and nutrient absorption of maize.[Result]The quadratic regress equations of corn yield and nitrogen application rate were as follows: Y= 491.12 + 15.99X-0.30X~2(R =0.9877~(**)).P fertilizer had a certain effect on the yield,but when the P application amount was larger, with the rising of the P application rate,the effect of P fertilizer was decreased on the yield and the effect of K application was little on the maize yield.The average demand quantity of 100 kg grain on N,P and K were 2.87,0.90,2.09 kg resp.The average utilization rates of N, P and K in 10 fertilization treatments were 39.68%,35.43%,50.01%resp.The effect of application fertilizer on the plant-type structure of maize,the chlorophyll content in functional leaf,the nitrogen,phosphorus and potassium content in plants and grain quality was little.[Conclusion] The suitable fertilization rate of summer maize for per-hektare yield of 105 000 kg in Huaibei area was as follows:N 300 - 375 kg/hm~2,P_2O_5 75 -90 kg/hm~2,K_2O 75 -90 kg/hm~2.