不同水分处理对半冬性小麦光合特性和产量的影响

以半冬性小麦品种豫麦49-198为材料,采用大田试验的方法,研究了不同时期灌水及不同灌水量对冬小麦叶面积指数(LAI)、干物质积累、光合特性和产量的影响。结果表明,拔节前灌水量的增加有利于提高LAI;拔节后适宜田间持水量为65%,灌水过多反而对干物质积累不利,特别是对花后旗叶的光合特性及产量的形成产生不利影响。

Effects of Water Treatments on Photosynthetic Characteristics and Yield of Semi-winter Wheat

Using semi-winter wheat Yumai 49-198 as experiment material,a field experiment was conducted to investigate the leaf area index,dry matter accumulation,photosynthetic characteristics and yield of winter wheat under different irrigation stages and amounts.The results showed that,before the jointing stage,the leaf area index increased with the increase of irrigation amount.After jointing stage,all the indexes were good when the field water capacity maintained at 65%,while too much irrigation amount was unfavourable to the dry matter accumulation,especially to the photosynthetic rate of flag leaf and yield formation after anthesis.