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Chinese Agricultural Science Bulletin ›› 2019, Vol. 35 ›› Issue (22): 6-9.doi: 10.11924/j.issn.1000-6850.casb19030068

Special Issue: 水稻

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Fertilization and Gibberellin“920”: Effect on Glume Dehiscence in Rice Seeds

  

  • Received:2019-03-17 Revised:2019-06-18 Accepted:2019-06-24 Online:2019-08-13 Published:2019-08-13

Abstract: The paper aims to explore the influence of fertilizing and gibberellin 920 on glume dehiscence. The parents of rice variety Jing you 127 were chosen as tested materials. The experimental treatments included topdressing, spraying foliar fertilizer and spraying gibberellin 920. It was found that the proper decreasing of N fertilizer or proper increasing of P K fertilizer at booting stage significantly brought down the risk of glume dehiscence. The effect of increasing of P K fertilizer was more significant than decreasing of N fertilizer. Both measures of spraying boric or K fertilizer at rupturing stage significantly decreased the risk of glume dehiscence. The effect of boric fertilizer was better than K fertilizer. In addition, the effect of both boric and K fertilizer application together was much better. Early or later gibberellin 920 spraying increased the rate of glume dehiscence. The influence of early spraying was more obvious. It was an ideal selection for Jing you 127 to spray 300g gibberellin 920 per hectare when 20 percent panicles were in heading.