摘要
试验研究了土壤干湿变化对冬小麦生长和产量的影响。结果显示 ,拔节期和抽穗期恢复供水 ,可使在苗期和孕穗期遭受不同程度干旱的冬小麦的株高、叶片数、叶面积、以及干物重等方面都超过其相应对照 ,表现出明显的补偿生长效应。同时 ,各复水处理与对照相比 ,分配到冠部的干物质比例均增加 ,R/ S下降。中度水分胁迫后充分供水的处理 ,可以在生物量和产量上都超过一直保持充分供水的对照 ,发生了超补偿。从而达到了农业生产上所要求的节水和增产的目的。
The effect of soil moistrure on the growth and grain yield of winter wheat were studied.The results were as follows.The height of plant,leaf numbers,leaf areas and dry matter weights of winter wheat threaten by water stress in varying degree at seedling stage and booting stage,which can exceed that of their drought controls and show obvious compensatory effects after rewatering during jointing stage and heading period.Meanwhile,the proportion of dry matter distributing to the shoot increased and the R/S decreased compared with their controls.Grain yields and biomass yields of the treatment that was subjected to moderate water stress could exceed that of the control,which show extra-compensatory effects.Thus,rewatering during jointing stage and heading period can attain our purpose of increasing yield and saving water.
出处
《内蒙古农业大学学报（自然科学版）》
CAS
2001年第2期62-66,共5页
Journal of Inner Mongolia Agricultural University(Natural Science Edition)
基金
国家重点基础研究发展规划项目 !(批准号 :G1 9990 1 1 70 9)
国家自然科学基金! (批准号 :49971 0 4 2 )资助
