优化灌溉与施肥对冬小麦冠层结构的影响研究

试验研究优化灌溉与施肥对冬小麦冠层结构的影响结果表明,与限量灌溉处理相比,优化灌溉和传统灌溉处理小麦最上部3个节间明显伸长,导致株高增高10cm,旗叶叶面积减小7%,但倒2叶和倒3叶叶面积分别增加7%和20%;优化灌溉处理小麦旗叶茎叶夹角明显减小。与未施N肥处理相比,施用N肥有增大小麦株高、叶面积和茎叶夹角的趋势,且传统施N比优化施N更加明显。优化水N管理麦田各层次透光率与传统处理差异较小,但它们均显著低于限量灌溉和未施N处理。

Effects of optimized irrigation and nitrogen fertilization on the canopy structure of winter wheat

Effects of optimized irrigation and nitrogen fertilization on the canopy structure of winter wheat were studied.The results show that compared with the sub-optimal irrigation,the optimized and traditional irrigation can elongate the length of uppermost 3 internodes of stems and increase the plant height by 10cm,decrease the flag leaf area by 8% and increase the 2nd and 3rd uppermost leaves area by 7% and 20%,respectively.The optimized irrigation decreases the angle between flag leaf and stem.Compared with the treatment without nitrogen fertilization,that with nitrogen fertilization increases all canopy structure parameters.There is little difference in the ratio of penetrated light between optimized and traditional irrigations with nitrogen fertilization.However,both of them decrease that compared with sub-optimal irrigation or the treatment without nitrogen fertilization.