摘要
对同期抽穗的再生稻与主季稻源库特征进行比较。结果表明,库特性方面:再生稻有效穗数和每穗粒数显著少于主季稻;再生稻的每穗粒数仅相当于主季稻的1/3-1/2。源特性方面:主季稻的LAI为再生稻的6-7倍;再生稻光合速率较主季稻高。流特性方面:再生稻成熟期单株总干重为主季稻的25%-35%;无论是主季稻还是再生稻,超级杂交稻组合的茎鞘物质输出率均高于对照汕优63;主季稻及再生稻的茎鞘物质输出率与成熟期单株总干重呈正相关。源库关系方面:再生稻的粒叶比是主季稻的2-3倍;主季稻属增库增产型,而再生稻属源库互作型,且增源增产效果更为明显。
The morphological characteristics of source and sink of ratooning rice and its same-term tasselling main crop are compared. The characteristic of sink is that the number of effective panicle and the spikelets per panicle of ratooning rice are obviously less than those of main crop. The spikelets per panicle of ratooning rice is only 1/3 - 1/2 of main crop. The characteristic of source is that the LAI in main crop is 6 -7 times more than that in ratooning rice. The photosynthetic rate of ratooning rice is higher than that of main crop, 3 super hybrid rice combinations shows higher photosynthetic rate than Shanyou 63. The characteristic of bleeding is that dry matter amount of single plant at ripening stage of ratooning rice is as heavy as 25% -35% of main crop. No matter main crop or ratooning crop, exporting percentage of stem and sheaths of the super hybrid combinations are higher than that of Shanyou 63. Exporting percentage of stem and sheaths and total dry matter amount of single plant of main crop and ratooning rice are positive correlation. As for source-sink relationship ： the rate of grain and leaf area in ratooning rice is 2 - 3 times higher than that in main crop. The main crop belongs to sink-limited, while the ratooning rice belongs to source-sink interaction, and the effect of sourcelimited is more obvious.
出处
《亚热带农业研究》
2009年第2期73-77,共5页
Subtropical Agriculture Research
基金
科技部农业科技成果转化资金项目(2006GB2D200)
湖南省农业科学院院长基金项目(05-18)
关键词
超级杂交稻
再生稻
主季稻
源库特征
super hybrid rice
ratooning rice
main crop
source-sink characteristics
