盐渍土区微咸水灌溉对冬小麦的影响

河北省黑龙港地区储有相对丰富的浅层地下微咸水。为合理开发微咸水资源，研究了不同灌水（灌水期、灌水量和水质）对冬小麦生长发育和产量的影响。结果表明：咸淡轮灌与灌淡水相比，早期干物质积累慢，LAI低，但后期积累养分能顺利转移到穗部，灌浆速度较快，也能获得高产。冬后关键期灌水，咸淡轮灌比灌淡水处理LAI较低，但茎叶干物质积累量较多的转移到籽粒中，灌浆速度快，两者籽粒产量无显著差异。关键期灌水的籽粒产量略低于充足灌水处理，而水分利用率较高。在此基础上，施肥处理的LAI、灌浆速度和籽粒产量显著大于不施肥处理。

Influence of Brackish Water Irrigation on Growth and Yield of Winter Wheat in Saline Soil

To rationally exploit the brackish water resources in Heilonggang region of Hebei province, the influence of different irriga tion parameters , such as irrigation period, quantity and water quality, on growth and yield of winter wheat was studied in this paper. The result showed that contrasted brackish water and fresh water irrigation in turn with fresh water irrigation, the former had slower accumulation speed of dry matter and lower LAI in the early period of wheat, but its speed of being in the milk was faster, grain yield was higher than the latter. Contrasted brackish water and fresh water irrigation in turn with fresh water irrigation on key period of after winter, the former has lower LAI and its speed of being in the milk wa.s faster than the latter, there was no significant difference of grain yield be tween the former and the latter. The WUE of the treatment of key period irrigation was higher than the treatment of sufficient water irrigation, while its yield was slightly lower than the latter. Under the condition of sufficient irrigation, LAI and grain yield of the fertilized treat ment were higher, and speed of being in the milk was significantly faster than the non-fertilized treatment.