摘要
综述了近年在温州市大面积应用的重穗型杂交稻籽粒灌浆的主要特点。重穗型杂交稻叶片的粒叶比大、气孔性状优良、光合"午休"现象较轻、净光合速率高,单位叶面积源的供应量大。重穗型杂交稻的维管结构良好,同化产物向籽粒输送的流畅通。因重穗型杂交稻的库容超大,单粒颖花的同化物供应量仍显不足,库源矛盾较突出。通过栽种适宜重穗型杂交稻组合、培育壮秧、建立高光效群体和加强中后期田间管理等技术措施,可以实现高产目标。
The main characteristics of grain filling of heavy panicle hybrid rice which has been applied in Wenzhou is summarized in this paper. It is considered that heavy panicle hybrid rice provides bigger source in the same leaf area and has higher net photosynthetic rate because of its higher grain-leaf area ratio, better stomatal characteristics, and less midday depression. However, it is deficient in assimilation products provided for individual grain because of its very big sink. Therefore, its contradiction between sink and source is very great. The high yield of heavy panicle hybrid rice is achieved by selecting appropriate hybrid rice combinations, raising vigorous seedlings, establishing populations with high photosynthetic efficiency, and improving the field managements in medium and late stages.
出处
《浙江农业学报》
CSCD
2004年第6期400-404,共5页
Acta Agriculturae Zhejiangensis
基金
温州市科技局资助项目(N2001A28)
关键词
重穗型
杂交稻
籽粒灌浆
库源关系
协调
heavy panicle
hybrid rice
grain filling
source-sink
coordination
