苜蓿改良的盐碱土壤施肥对小麦的效应研究—I．对小麦生长及产量的影响

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

摘要: 盆栽试验和大田试验结果表明，苜蓿改良的盐碱土壤仍以施N肥对小麦的增产作用最明显，盆栽小麦可增产61．2%，相对叶重增加16．2％，穗粒教增加37．36%，穗粒重增加10．3 %;施P肥小麦增产l6．78%，穗粒重增加8．39%，怛对穗粒教影响较小;施K肥效果不明显；NP结台施用小麦增产74．76%．大田试验拖N肥小麦可增产60%;NP结合施用小麦增产73．5%．施N补P是苜蓿改良的盐碱土壤作物增产的关键,也是该类地区的共性问题。

Abstract: 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．