春小麦伤根节水增产效应的试验研究

Effect of root cutting on water use efficiency and yield of spring wheat

盆栽试验中,分别在小麦的苗期与拔节期切断其一部分根系,通过测定其叶面积动态、生物量、水分利用效率及产量,探讨伤根对小麦生长及其水分利用效率的影响。结果表明:伤根可以延缓小麦叶片的衰老,延长其功能期;可以提高水分利用效率;苗期适度伤根可以增加产量。

The leaf area, aboveground biomass, WUE and yield were measured after cutting part of root at seedling stage and elengation stage. The results show that cutting roots can retard the senescence of the leaves, prolong their functional period and improve WUE. Moderate root cutting of spring wheat at seedling stage can increase the grain yield.