Effects of different fertilizing on biomass yield and plant characters of silage maize in southern China

The effects of applying nitrogen, phosphorus and potassium fertilizers on the yield and growth performance of silage maize were studied with field plot experiment and the results showed that the growth of silage maize was obviously improved by fertilization. With the increase of nitrogen application, the growth stage and harvest time were postponed while phosphorus and potassium fertilizers have little effect on the growth period. The application of nitrogen fertilizer promoted the growth of silage maize, but higher application (urea 360 kg/hm2) could easily cause lodging. Potassium fertilizer could improve the lodging resistance. The yield of silage maize could be increased by proper application of nitrogen and potassium fertilizers.