施肥、赤霉素“920”对水稻种子裂颖影响的研究  

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

作　　者：孙小文 刘延斌 Sun Xiaowen;Liu Yanbin(China National Seed Group Co.,Ltd,Beijing 100031)

机构地区：[1]中国种子集团有限公司

出　　处：《中国农学通报》2019年第22期6-9,共4页Chinese Agricultural Science Bulletin

摘　　要：为了探索施肥和赤霉素"920"对水稻种子裂颖的影响。以水稻品种‘旌优127’的双亲作为试验材料,开展追肥、喷施叶面肥、喷施"920"等试验研究。结果发现,孕穗期追肥时,适当的减施氮肥、或者增施磷钾肥均可显著降低裂颖发生的风险,增施磷钾肥对降低裂颖的效果优于减施氮肥的效果。破口期叶面喷施硼肥或钾肥均可显著降低裂颖发生的风险,其中叶面喷施硼肥的效果优于喷施钾肥,既喷施硼肥又喷施钾肥的效果更好。喷施"920"过早、或者过晚均显著加重裂颖,其中喷施偏早的影响更显著。对‘旌优127’制种而言,抽穗20%时,喷施300g/hm^2"920"是比较理想的选择。The paper aims to explore the effect of fertilization and gibberellin"920"on glume dehiscence in rice seeds.Taking the parents of rice variety‘Jingyou 127’as experiment materials,we carried out experiments including topdressing,spraying foliar fertilizer and spraying gibberellin"920".The results showed that the proper decrease of N fertilizer or proper increase of P and K fertilizer at booting stage could significantly reduce the risk of glume dehiscence;the effect of increasing P and K fertilizer was more significant than that of decreasing N fertilizer.Spraying B or K fertilizer at rupturing stage could both significantly decrease the risk of glume dehiscence,and the effect of B fertilizer was better than that of K fertilizer.In addition,the effect of B and K fertilizer applied together was much better.Spraying gibberellin"920"earlier or later could increase the rate of glume dehiscence,and the effect of earlier spraying was more obvious.It is an ideal selection for‘Jingyou 127’to spray 300 g gibberellin"920"per hectare when 20%panicles are in heading.

关 键 词：追肥 叶面肥 “920” 水稻种子 裂颖 

分 类 号：S143[农业科学—肥料学]