Abstract:

Fertilization investigation on corn was carried out in main production regions of Liaoning province.The results showed that the corn with Urea,Complex fertilizer, Diammonium phosphate and organic fertlizer were 84.6%, 80.3%, 40.1% and 34.2%, respectively.Seen from fertilizer rate in different regions , Urea rate was about same, Diammonium phosphate rate was north of Liaoning > west of liaoning > south of Liaoning, Complex fertilizer rate was north of Liaoning>south of Liaoning >west of liaoning, organic fertlizer rate was west of liaoning> north of Liaoning>south of Liaoning .The average N,P2O5 and K2O application rates on corn were 234.4 kg/hm2,104.8 kg/hm2 and 53.5kg/hm2 in Liaoning ,respectively. Most of the total fertilizer amount was from chemical fertilizer. N, P2O5 and K2O application rates were different in differet corn areas, N,and P2O5 application rates were north of Liaoning > west of liaoning >south of Liaoning, K2O application rates were south of Liaoning >north of Liaoning > west of liaoning . The ratio of P2O5 and K2O was low,especially K2O rate was too low. K2O application rates and ratio were high under high corn yield level.