Abstract

Taking the conventional japonica hybrid rice Changyou 3 and indica-japonica super hybrid rice Yongyou 12 as materi- als, the experiment analyzed the effects of brassinosteroids (BRs) on photosynthetic characteristics, dry matter accumulation, ni- trogen absorption and utilization, non-structural carbohydrates (NSC) accumulation and the NSC/N ratio of different plant organs during grain filling stage. Results showed that the effect of BRs on photosynthetic indexes presented as gs>Tr>Pn>Ci. Spraying

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