优化水肥与传统水肥对冬小麦叶片生长、群体光分布及产量的影响

与传统水肥相比 ,优化水肥、秸秆还田优化水肥处理冬小麦主茎上第四叶叶面积和厚度略微减少 ,叶倾角、消光系数、各层透光率与传统水肥处理差异很小 ,株形尚好。优化水肥和秸秆还田优化水肥处理冬小麦籽粒产量略高于传统水肥处理。与优化水肥处理相比 ,秸秆还田优化水肥处理有利于增加光合面积 ,提高叶片质量 ,改善冠层结构和光分布状况 ,增加单位面积籽粒产量。

Effects of the Optimized Irrigation-optimized Fertilization and Traditional Irrigation-traditional Fertilization on Leaf Growth,Population Light Distribution and Grain Yield of Winter Wheat

As compared with the treatment of traditional irrigation-traditional fertilization,the treatments of the optimized irrigation-optimized fertilization and optimized irrigation-optimized fertilization with crop residues showed a bit decrease on total area of flag leaf,2 nd leaf, 3 nd leaf and 4 nd leaf from top,and leaf thickness, and little difference on leaf tilt angle,light extinction coefficient, ratio of light penetration in the upper, middle and lower parts of the canopy,and had fair plant type. Grain yield per unit area from the treatment the optimized irrigation-optimized fertilization and optimized irrigation-optimized fertilization with crop residues was higher than that from the treatment of the traditional irrigation-traditional fertilization. In comparison with treatment of the optimized irrigation-optimized fertilization,the treatment of the optimized irrigation-optimized fertilization with crop residues is beneficial to increasing photosynthetic area, improving leaf quality, canopy structure and light distribution, increasing grain yield per unit area.