不同群体小麦生态生理效应的研究

Studies on the Ecological and Physiological Effects of Different Wheat Populations

1986～1989年在豫东平原生态条件下,对不同群体小麦的生态生理效应的研究结果表明:不同群体小麦的根系分布、分蘖消长、叶面积变化等有明显差异,对产量及其构成因素的影响很大。随着密度增加,叶片叶绿素含量及其a/b值逐渐变小,同一叶位叶片光合强度相应降低,比叶重与光合强度呈显著正相关,不同群体影响小麦植株体内氮、磷、钾素的分配。

The trials were made under the ecological conditions of the east plain of Henan Province in 1986-1989,The results acquired were as i'ollo\vs: The distribution of roots,the changes of tillers and leaf area of different populations developed differently; with the increasing of planting density, the chlorophyll content of leaves and chlorophyll a/b value decreased gradually,- and the photosynthetic intensity of leaves in the same position decreased as well; the weight of leaf and the photosynthetic intensity showed a prominent positive correlation; the content of N, P, and K of the wheat plants of different populations distributed differently.