中国农业科学 ›› 2005, Vol. 38 ›› Issue (07): 1339-1345 .

• 耕作栽培.生理生态 • 上一篇    下一篇

烯效唑干拌种对小麦根叶生理功能的影响

杨文钰,樊高琼,任万军,王 竹,于振文,余松烈   

  1. 四川农业大学农学院
  • 收稿日期:2004-04-27 修回日期:1900-01-01 出版日期:2005-07-10 发布日期:2005-07-10
  • 通讯作者: 杨文钰

Physiological Effect of Uniconazole Waterless-Dressed Seeds on Root and Leaf of Wheat

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  1. 四川农业大学农学院
  • Received:2004-04-27 Revised:1900-01-01 Online:2005-07-10 Published:2005-07-10

摘要: 为探明烯效唑对小麦的增产机理,通过常规田间试验和土柱栽培试验,研究了不同品种、不同施氮条件下烯效唑干拌种对小麦根、叶生理功能的影响。结果表明,烯效唑提高了根系活力,使根系对32P的吸收强度增加了20.2%,并大量分配给分蘖,比对照提高了5.7倍。叶面积显著增加,光合能力增强,单株对CO2的同化力提高了25.9%,14C同化物分配给根系和分蘖节的比例提高。生育后期,根、叶中超氧化物歧化酶(SOD)的活性增强,丙二醛(MDA)的含量降低。烯效唑的使用浓度以20 mg·kg-1为最佳。

关键词: 烯效唑, 小麦, 根,

Abstract: For a better understanding of the yield-increasing mechanism of wheat with uniconazole, the physiological effects of uniconazole (S-3307) waterless-dressed seeds on root and leaf of wheat were studied with different varieties and nitrogen levels in traditional field experiments and soil column culture. The results showed that S-3307 increased root vigor, which resulted in the absorption of 32P increased by 20.2% and the proportions of 32P distributed to tiller increased by 570% over the control. S-3307 also significantly increased the area of top leaf, improved the photosynthetic capacity of leaf, promoted the assimilatory ability of leaf by 25.9% as compared with the control, and distributed more 14C assimilates to roots and tiller nodes. At the later stage, S-3307 increased SOD activity, reduced MDA content in root and leaf. It is concluded that the best concentration of S-3307 is 20 mg per kg seeds.

Key words: Uniconazole, Wheat, Root, Leaf