四川农业大学学报 ›› 1993, Vol. 11 ›› Issue (03): 366-371.doi: 10.16036/j.issn.1000-2650.1993.03.006

• 研究论文 • 上一篇    下一篇

油菜抽苔期施多效唑的降高防倒效果及其应用途径

袁继超1, 徐忠荣2, 黄静娴1, 杨文钰1   

  1. 1. 四川农业大学农学系, 625014;
    2. 成都市农技站, 成都市 610066
  • 收稿日期:1992-12-21 出版日期:1993-09-30 发布日期:2017-04-22
  • 基金资助:
    国家自然科学基金资助项目

EFFECT OF PALCOBUTRAZOL APPLIED AT THE BOLTING STAGE OF THE OLLSEEDRAPE ON PLANT HEIGHT AND ITS APPLICATION CONDITIONS

Yuan Jichao1, et al2   

  1. Sichuan Agricultural University, Yaan, Sichuan, 625014
  • Received:1992-12-21 Online:1993-09-30 Published:2017-04-22

摘要: 本文研究了油菜抽苔期施用多效唑降低株高、防止倒伏的效果及其与施氮水平和赤霉酸的配合效应,结果表明:油菜抽苔期施用多效唑可显著降低植株高度和分枝高度,增加根颈粗度,提高抗倒伏能力,这种效果随多效唑浓度的增加而提高。多效唑对油菜产量的效应表现为两方面,一是在中低肥水平下植株生长较差,多效唑浓度较高时,因过分抑制生长,使株体变小而减产;二是多效唑处理后因提高了植株抗倒能力,避免或减轻倒伏造成的损失而间接增产,因此多效唑只适于高肥水条件下植株生长过旺,有倒伏威胁的田块。油菜抽苔初期150ppm多效唑处理后26天又喷施40ppm的赤霉酸可刺激生长发育和开花结果,既有一定降高防倒效果,也有一定增产作用。

关键词: 油菜, 植物生长调节物质, 倒伏, 产量, 株高, 抽苔期

Abstract: The effect of palcobutrazol (PP333) applied at the bolting stage o the oilseed raPe and its. combinative effect with nitrogen level and gibberellin (GA3) on plant height and lodging resistance were studied. The results showed as follows, pp333 applied at the bolting stage of the oilseed rape signifficantly decreased plant height, lowered primary branching height, and thickened root collar, as a result, increased lodging resistance. The higher the concentration of PP333, the stronger the effect, The effect of PP333 on the rapeseed yield was showed on two sides, PP333 decreased the yield by inhibiting growth too much under low nifrogen level, especially under high concentration of PP333, but it might increase the yield indirectly by incresing lodging resistance and reducing yield loss of lodging under high nitrogen level. 40ppm GA3 applied 26 days affter applying PP333 at the bolting stage promoting growing and flowering. Both effect of increasing lodging resistance and rapeseed yield were showed in this case.

Key words: BRASSICA, SPP, PLANT GROWTH REGULATING SUBSTANCES LODGING, YIELD, PLANT HEIGHT, BOITING STAGE

中图分类号: 

  • S565.4