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Journal of Agriculture ›› 2019, Vol. 9 ›› Issue (9): 1-4.doi: 10.11923/j.issn.2095-4050.cjas19030021

Special Issue: 水稻

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The Influence Factors of Glume Dehiscence in Rice Seeds

  

  • Received:2019-03-17 Revised:2019-05-29 Accepted:2019-06-24 Online:2019-09-16 Published:2019-09-16

Abstract: The paper aims to explore the influence of fertilizing and gibberellin on glume dehiscence of rice seeds. In this experiment, the parents of‘Guang 8 you 169’were chosen as tested materials. The experimental treatments included spraying foliar fertilizer, spraying gibberellin“920”and topdressing. The results showed that boron and zinc application at phase 4 of young panicle differentiation or at initial heading stage could significantly reduce the risk of glume dehiscence. The effect of boron and zinc application at both the two stages was more significant than that at separate stage. With the dose increase of gibberellin“920”and earlier or postponed spraying, the rate of glume dehiscence increased. It is ideal for‘Guang 8 you 169’to spray 225 g/hm2 gibberellin“920”at 25% panicles. When topdressing is conducted at the tillering stage, appropriately decreasing N fertilizer or increasing P K fertilizer could significantly reduce the rate of glume dehiscence.