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.

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％,穗粒数增加37.36％,穗粒重增加10.3％;施P肥小麦增产16.78％,穗粒重增加8.39％,但对穗粒数影响较小;施K肥效果不明显;NP结合施用小麦增产74.76％。大田试验施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。

Pot and field experiments were conducted in Nanpi Eco-agricultural Experiment Station, CAS, from 1995 to 1996. The results show that in saline soil improved 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 in-crease yield by 60% and 73.5% respectively. Application of N and P is the key to increase crop yield in saline soil improved by alfafa, which is also the key to get high crop productivity in this region.