The Effects of N,P,K Mixed Fertilizing on Fresh Forage Yield and Nutriention of Argangjin Alfalfa

Using 3414 quadratic regression optimum design,the effects of N,P,K mixed fertilizing on fresh forage yield and nutriention of Argangjing alfalfa(Medicago sativa cv.Argangjing)was studied in gray meadow soil of West Liao Rever Plain of Inner Mengoulia Autonomous Region in 2003.The result showed that the optimum combination of N,P,K was N:3.37 kg/hm2,P2O5:55.61 kg/hm2,K2O:256.63 kg/hm2 and the fresh forage yield of alfalfa was 77 944 kg/hm2.In the 14 treatments,the contents of crude nitrogen of treatment 8 and treatment 10 were higher,and the contents of crude fiber in the treatment 7 and treatment 8 were low down 25% at early blooming stage and the contents of crude protein and crude fiber reached the 1st level of the state′s standards.The content of crude ash was lower in the treatment 8 at early blooming stage.This study gived a rational fertilizing program for planting Argangjing alfalfa in the Tongliao area,achieving high quality forage on the basis of increase yield.