四川农业大学学报 ›› 1991, Vol. 9 ›› Issue (01): 109-114.doi: 10.16036/j.issn.1000-2650.1991.01.017

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拔节期施用多效唑对籼粳杂交稻的效应研究

杨文钰, 马均   

  1. 四川农业大学农学系水稻所, 雅安
  • 收稿日期:1990-07-09 出版日期:1991-03-31 发布日期:2017-04-22

STUDY ON EFFECT OF PP333 APPLIED AT ELONGATION STAGE ON INDICA-JAPONICAHYBRID RICE

Yang Wenyu, Ma Jun   

  1. Sichuan Agricultural Unirersity, Yaan, Sichuan China
  • Received:1990-07-09 Online:1991-03-31 Published:2017-04-22

摘要: 本文研究了拔节期施用多效唑对籼粳杂交稻的株高和产量的影响。结果表明,多效唑通过降低日增高,减缓株高生长;施药后第2周的降高效应最大,以后逐渐下降;多效唑浓度越大,药效期越长。各处理主要通过缩短基部节间的长度,降低植株高度。浓度越大,降高效应越大,以400-800ppm的降高效果较好。多效唑对产量及产量构成因素无显著影响。

关键词: 水稻, 产量, 植物生长调节剂

Abstract: The effect of PP333 applied at elongation stage on plant height and yield of indica-japonica hybrid rice was studied. The results showed as follows. PP333 retarded plant height growth by decreasing the speed of height increase. The most effective time of PP333 on plant height was at the second week after applying. Then the effect of PP333 decreased. The higher the concentration of PP333, the longer the effecting duration of PP333. All treatments rdeuced plant height by reducing lengthes of basic internodes. The higher the concentration, the larger the effect of PP333. Of all concentrations, the effect of 400-800ppm on plant height was the highest. PP333 did not influence the yield and its components significantly.

Key words: LOWLAND RICE, YIELD, PLANT GROWTH REGULATORS

中图分类号: 

  • S511.1