灌浆期复水对冬小麦根、冠生长及其相互关系的影响研究  

Effects of rewatering during the filling stage after previous water stress on the root and shoot growth and their relations

作　　者：陈晓远[1] 罗远培[2] 李韵珠[3] 

机构地区：[1]韶关学院英东生物工程学院,广东韶关512005 [2]中国农业科学院农业气象研究所,北京100081 [3]中国农业大学资源与环境学院,北京100094

出　　处：《干旱地区农业研究》2003年第4期73-77,87,共6页Agricultural Research in the Arid Areas

基　　金：国家重点基础研究发展规划项目"作物对水分变动环境响应的整体复杂性"(G1999011709);国家自然科学基金项目"土壤水变动与根;冠调节的关系及其对节水的作用"(49971042)

摘　　要：以冬小麦品种北农6号为材料,研究了灌浆期复水对冬小麦生长的影响。结果表明,前期受旱程度不同的植株灌浆期恢复供水后,其株高、单株叶面积、生物量及产量等都超过相应的干旱对照,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。中度水分亏缺后充分供水的处理,可以在少减产的情况下节约大量用水,从而达到节水的目的。The effect of rewatering during the filling stage on the growth were studied using hte wheat cultivar Beinong 6 as materials. The results indicated that the plant height, leaf area, biomass and grain yield of wheat rewatered during the filling stage after previous water stress exceeded those of the drought controls, showing that there was a compensatory growth in the rewatered plants. Meanwhile, the proportion of dry matter distributed to the shoot increased and the R/S decreased in the rewatered treatments compared with the controls. The treatment of rewatering after moderate water stress could save a great deal of water in the case of little reduction in grain yield. Thus, rewatering during the filling stage had a remarkable effect on promoting growth and reducing water consumption of wheat.

关 键 词：灌浆期 复水 冬小麦 根系生长 冠生长 相互关系 补偿生长效应 

分 类 号：S512.11[农业科学—作物学]