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Study on the growth and development characters of dry nursery seedlings and their regularities of yield formation in early hybrid rice Ⅱ Effect of the assimilation metabolism and sink source relationship of dry nursery seedlings in its yield

Yang Deguang et al. (Agriculture and animal university of PLA, Changchun 130062,China)  
The accumulation, distribution and transportation of assimilation, sink source relationship and their effect on yield were investigated by contrast to the paddy nursery seedling (PNS). The results indicated that: the yield of the dry nursery seedling (DNS) was higher than PNS' because of its more panicles per unit area. The physiological basis of its high yield was that the DNS plants had more assimilation and reasonably large grain; leaf rate even with large LAI. However, the DNS plants had low assimilation transportation rate resulting in a small harvest index that limited its yield potentiality.
【Fund】: 长江流域早杂协作组下达项目
【CateGory Index】: S511.3
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