Abstract:

The maize yields and fertilizer actuality of Zigui county were investigation and analysis. The results showed that employed proportion farmyard manure was very universality in main maize production region of Zigui county, Yichang. The fertilizer by mainly consists of urea and compound manure, and compound manure by mainly consists of 25% nutrient content and that the 10-7-8 was dominate. N application lowest was 156 kg/hm2, and the highest was 320.25 kg/hm2, the average N application was 234.4 kg/hm2. Rate of ground N fertilizer from 19.45% to 56.08%, and average rate was 37.2%. N fertilizer at seeding stage rate from 18.71% to 43.0%, average rate was 26.67%, heading dressing rate from 26.93% to 47.23%, average rate was 36.1%. Proportion of NPK was 1:(0.13-0.43):(0.13-0.43), average ratio was 1:0.23:0.26. There had positive correlation markedly in application rate of P, K and maize yield in 4350-7200 kg/hm2, and in N application rates of every stage and maize yield in 7800-8250 kg/hm2.This investigations shows that N application rate was reasonable in essence, and the application rate of phosphorus and potassium was slightly deficiency, to increase the yield of maize by enhance the rate of phosphorus and potassium reasonable.