摘要： 通过对转基因抗虫杂交棉保留不同数量叶枝、设置不同密度处理, 研究发现, 随着叶枝数量增多, 单个叶枝籽棉产量占单株籽棉总产的比例降低, 留2叶枝处理单叶枝籽棉产量占16%左右, 留3叶枝处理占12%左右, 留4个叶枝处理占9%左右。同一叶枝数处理中, 叶枝之间籽棉产量无显著差别。同时, 随叶枝数量的增加, 单个叶枝叶面积占单株总叶面积比例减少, 留2叶枝处理中单个叶枝叶面积比例占20%左右, 留3叶枝处理占15%左右, 留4个叶枝处理占13%左右。叶枝铃数占单株总铃数比例也有减少趋势, 留2叶枝处理中单叶枝占20%, 留3叶枝占15%, 留4叶枝占13%, 且同一叶枝处理中, 各叶枝比例差别不显著。而叶枝的数量对主茎叶和叶枝中叶绿素a的含量无显著影响。

关键词: 叶枝, 产量, 贡献规律

Abstract: Different number of leaf branches and different consistency treatments were adopted with different genotype cottons. The results showed that the seed cotton yield ratio of single leaf branch and the individual plant was fall, with the number of leaf branch was rose. The seed cotton yields ratio of single leaf branch is about 16% with the 2 leaf branches, the 3 leaf branches is about 12%, the 4 leaf branches is about 9%. The seed cotton yields of leaf branches in the same treatment had no differences. The leaf area ratio of single branch and the individual plant was fall with the risen of number of leaf branches. The leaf area ratio of single leaf branch was about 20% with the 2 leaf branch, the 3 leaf branch was about 15 %, the 4 leaf branch was about 13 %. The number boll ratio of single leaf branch and individual plant was also fall, The cotton boll ratio of single leaf branch was about 20% with the 2 leaf branch, the 3 leaf branch was about 15%, the 4 leaf branch was about 13%, the cotton boll of leaf branches in the same treatment had no differences. The content of chlorophyll a of leaf branch and caulis had no change with treatments of different leaf branch.

Key words: Leaf branch, Yield, Contribution law

中图分类号: 

• S562