不同水分处理对膜下滴灌棉花生理指标及产量的影响

20 0 0年 5～ 8月在新疆石河子炮台土壤改良试验站 ,进行了不同水分处理对膜下滴灌棉花生长和产量影响的研究。结果表明 ,为了获得较高的皮棉产量和水分利用率 ,膜下滴灌棉花全生育期的耗水量应在 345～380 m m;特定阶段和程度的水分亏缺虽然降低了总生物量 ,但提高了生殖器官在总生物量中的分配比例 ;与对照相比 ,苗期每次灌水推迟 2 d,蕾期恢复正常供水 ,花铃后期每次灌水推迟 2 d,是适合于当地膜下滴灌棉花需水规律的灌水模式

The effect of different irrigation patterns on cotton growth and yield under the condition of drip irrigation under plastic mulch

The field experiments were conducted at the Experimental Station of Soil Amelioration,Shihezi,Xinjiang Uygur Autonomous Region from may to August of 2000.It showed that the excessive irrigation was not benefit to increase cotton yield.Water deficit has a big effect on cotton height.Though the proper time and moderate water deficit reduce the total biomass,it adjusts the distribution of total biomass between reproductive and vegetative organs.The excessive irrigation or long term water stress will lead in higher shattering rate of buds and flowers at the early stage of flower.The moderate water deficit during seedling stage,full water supply during bud and flower stages,proper control of water supply at the later stage of flower,will be benefit to increase cotton yield.The moderate water deficit can heighten cotton quality.