开花期复水对受旱冬小麦的补偿效应研究

以冬小麦品种北农6号为材料，研究了开花期复水对小麦生长的影响。结果表明，前期受旱程度不同的植株开花期恢复供水后，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。中度水分胁迫后充分供水的处理，可以在少减

Study on the Compensatory Effect of Rewatering during the Flowering Stage after Previous Water Stress in Winter Wheat

The effect of rewatering during the flowering stage on wheat growth were studied using wheat cultivars BeiNong 6 as materials. The results indicated that the plant height, leaf areas, biomass and grain yield of wheat rewatered during the flowering stage after previous water stress can exceed that of their drought controls, it showed that there were compensatory growth in the rewatered plant. Meanwhile, the proportion of dry matter distributed to the shoot increased and the R/S decreased in rewatered treatments compared with their controls. The treatment underwent moderate water stress earlier could save a great deal of water in the case of not reduction in grain yield. Thus, rewatering during the flowering stage had a remarkable effect on promoting growth and reducing water consuming in wheat.