中国水稻科学

中国水稻科学

• 研究报告 • 上一篇    下一篇

赤霉酸和多效唑对水稻“粒间顶端优势”的调节及对产量的影响

王 熹; 陶龙兴; 黄效林; 俞美玉   

  1. 中国水稻研究所， 浙江 杭州 310006
  • 收稿日期:1900-01-01 修回日期:1900-01-01 出版日期:1999-10-10 发布日期:1999-10-10

Regulating the inter-Grain Apical Dominance of Rice by GA3 and PP333

Wang Xi; Tao Longxing; Huang Xiaolin; Yu Meiyu   

  • Received:1900-01-01 Revised:1900-01-01 Online:1999-10-10 Published:1999-10-10

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摘要： 以杂交水稻为主要参试材料，辅之以常规稻品种进行了外源植物生长物质调节水稻“粒间顶端优势”的试验。于水稻初穗期施用浓度为10 mg/L的GA3可增强单穗粒间顶端优势，虽增加粒重，提高结实率，但效果不稳定，有些处理反有下降，且多数杂交水稻未获增产，仅提高常规晚粳稻产量。于水稻初穗期施用浓度为10 mg/L的PP333可抑制单穗粒间顶端优势，增加每穗实粒数，提高结实率和千粒重，增加杂交稻和常规稻产量。此外，高浓度GA3或PP333（GA3≥30 mg/L，PP333≥50 mg/L）均可能引起水稻减产。将GA3和PP333适当复配后，研制成二元植物生长物质“粒粒饱”。

关键词: 水稻, 顶端优势, 结实, 植物生长调节剂

Abstract: The regulation of GA3 and PP333 applied at initial heading stage on rice grain filling characteristics was studied in some hybrid rice combinations and conventional rice varieties. The results indicated that the panicle apical dominance could be enhanced by application of GA3 and inhibited by PP333. GA3 treatment could increase 1000-grain weight with low seed-setting rate, eventually decrease the grain yield of hybrid rice. PP333 application at initial heading stage could increase grain yield both in hybrid rice and in conventional varieties. High concentration of GA3(>30 mg/L) and PP333 (>50 mg/L) treatment could have negative effects on grain yield. The two-component plant growth substance, Lilibao (meaning every grain will be filled), were formulated.

Key words: rice, apical dominance, seed set, plant growth regulator