Effect of Nitrogen,Phosphorus Levels on Grain Yield and Qualities of Compact Corn

The effects of different nitrogen and phosphorus application on grain yield and qualities of compact corn Jidan 209 were studied.The results showed that a significant difference in grain yield of corn at different levels of nitrogen and phosphorus application was found.Under this experiment condition,the suitable application amount of N,P_2O_5 and K_2O was respectively 200 kg/hm~2,60 kg/hm~2 and(50 kg/hm~2),and the economical N application amount was 174.4 kg/hm~2.The effect of N application on corn grain protein content and lysine content was observed.When P amount was(30 kg/hm~2),to vary N amount from 100 kg/hm~2 to 250 kg/hm~2,corn grain protein content would increase by 0.33% and yield would increase by 10.1%.With the increase of N amount,corn gain oil content increased within certain level.With the increase of P amount,corn gain oil content increased in the same N level.