Effect of fertilizer on wheat in saline soil improved by alfafa--I. Its effect on the growth and yield of wheat

Pot and field experiments were conducted in Nanpi Eeo-agricultural Experiment Station, CAS，from 1995 to 1996．The results show that in saline sol1 ireproved by alfafa，application of N can increase grain yield of wheat by 61．2％,relative leaf weight by 16．2%，grain number by 37．36%．grain weight by 10．3 in pot experiment．Under the conditions of P application，grain yield increased by 16．78%，grain weight by 8．39%，but there is no effect on the grain number．Application of N and P could increase grain yield by 74．76%．But K is almost no effect on the growth．biomass and yield of wheat．Application of N and NP could increase yield by 60% and 73．5％ respectively．Application of N and P is the key to iocrease crop yield in saline soil improved by alfafa，which is also the key to get high crop productivity in this region．