冬小麦茎生叶与穗部性状关系的研究

The Studies on the Relation between Stem Leaves And Characters of Spike in Winter Wheat

通过剪叶试验探明了冬小麦主茎茎生各叶与穗部性状的关系。对茎生各叶分别进行不同程度剪除后,使穗长、总小穗数、穗粒数、穗粒重和千粒重均比对照降低,对其中穗粒重和千粒重降低最大,而不孕小穗数则明显增加。剪除主茎中部叶片(8/0—10/0)不仅影响穗粒数,而且影响粒重,剪除上部叶片(11/0和旗叶)除严重影响穗重外,也影响穗粒数。剪除旗叶对穗部性状影响最大。剪叶对穗部性状的影响在品种间是有差异的。

This experiment with leaf-cut shows that cutting off the stem leaves in dif- -ferent degrees respectively, the length of the spike, total number of spikelets, kernels, per spike, grain weight per spike and weight per thousandgrain all decreased but the number of sterile spikele increased remarkably. Removing the leaves on the middle part of the main stem (8/0--10/0 leav- -es) not only affects number of kernels per spike but also the grain weight per spike. While the leaves on the upper part were removed (11/0 and flag leaf), the grain weight per spike decreased, significantly and the number of kernels per spike also declined. The most disadvantageous effects ocoured when the fl- -ag leaf was removed.