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中国农学通报

中国农学通报 ›› 2009, Vol. 25 ›› Issue (22): 0-0.

所属专题： 水稻

• 农学 农业基础科学 •    

抛栽密度与促芽肥用量和化学促芽剂对中稻—再生稻的影响研究

吉中贵 邓相秋 何花强 张建奎 孙海艳   

  • 收稿日期:2009-09-08 修回日期:2009-09-11 出版日期:2009-11-20 发布日期:2009-11-20
  • 基金资助:
    国家测土配方施肥财政补贴资金项目

Effect of Seedling-throwing density and application amount of bud-promoting fertilizer on Hybrid Medium Rice-Ratooning Rice

  • Received:2009-09-08 Revised:2009-09-11 Online:2009-11-20 Published:2009-11-20

PDF (PC)

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摘要： 此研究是针对再生稻生产中存在发苗不足、成穗率低、肥料利用率不高等因素而设计。试验结果表明，抛栽密度在18-31.5万穴/hm2的范围内，再生稻粒重变化不大，实际产量基本一致，但再生稻发苗数和有效穗以18-22.5万穴/hm2最高，分别达20.3-24.3苗/穴和18.9-20.1穗/穴；促芽肥施用过多，会影响头季中稻的产量，随促芽肥的增加，再生芽长也增长，但发苗数、有效穗数、结实率、单穴穗重则有下降趋势。同时，化学促芽剂4PU-30、高产精、腐殖酸、IAA能够增加头季中稻单穗重和促进再生芽的萌发生长，提高穗数和产量。

关键词: 硬肉桃, 硬肉桃, 果实硬度, 细胞膜透性, 内源激素

Abstract: This study was directed towards insufficient seeding, low tillering rate and utilization rate of fertilizer. The results were showed as follows. When seedling-throwing density was kept within the range of 180000-315000 hole/hm2, grain weight of ratooning rice remains the same. Tiller number and number of productive ear reach maximum with 20.3-24.3Seeding/Hole and 18.9-20.1 spike /hole if seedling-throwing density was kept within the range of 180000-225000 hole/hm2. If excessive bud-promoting fertilizer was applied, the length of regeneration bud increased. However, seedling number, number of productive ear, setting percentage and Microcomputer nest spike weight decreased, which resulted in low yield of hybrid medium rice. In the meantime, chemical promoter 4PU-30、Yield precise, humic acid and IAA can promote single spike weight and growth of regeneration bud, which resulted in high spike numbers and high yield.