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中国农学通报 ›› 2018, Vol. 34 ›› Issue (6): 19-24.doi: 10.11924/j.issn.1000-6850.casb17020083

所属专题: 生物技术 油料作物 园艺

• 农学 农业基础科学 • 上一篇    下一篇

不同浓度腐殖酸对油菜苗期生长及生理特性的影响

王宇函,姜存仓,吕 波,闫 磊   

  1. 华中农业大学微量元素研究中心,华中农业大学微量元素研究中心,华中农业大学微量元素研究中心,华中农业大学微量元素研究中心
  • 收稿日期:2017-02-22 修回日期:2018-01-30 接受日期:2017-04-18 出版日期:2018-02-26 发布日期:2018-02-26
  • 通讯作者: 姜存仓
  • 基金资助:
    公益性行业农业科研专项:南方酸性土壤改良与作物品质提升关键技术研究(201303095); 大学生科技创新基金项目:生物刺激类有机液态肥的研发及生物学效应(SRF2017075)

Effects of Different Concentrations of Humic Acid on Growth and Physiological Characteristics of Rape Seedlings

  • Received:2017-02-22 Revised:2018-01-30 Accepted:2017-04-18 Online:2018-02-26 Published:2018-02-26

摘要: 以油菜品种Cao221167为试验材料,探究水培条件下腐殖酸对作物苗期生长及生理特性的影响。通过设置不同浓度的腐殖酸(0;1‰;2‰;3‰;4‰;5‰)研究其对油菜幼苗生物量、株高、根系特征、叶绿素含量、MDA含量以及抗氧化酶活性等的影响。[结果]结果表明,1‰浓度腐殖酸时显著影响油菜幼苗的生物量(地上部干鲜重分别比对照增加18%和12.20%,地下部干鲜重分别比对照增加41.67%和54.70%),添加腐殖酸可以明显提高油菜幼苗根系活力;浓度为1‰时显著促进根系的生长(根长、总根长和根表面积分别比对照增加20.36%、70.49%、30.43%)。在1‰~5‰浓度范围内油菜细胞内抗氧化酶活性先减小后增大,叶绿素含量先增大后减小。因此,一定浓度的腐殖酸可以促进油菜的生长,且1‰~2‰浓度的腐殖酸是油菜苗期生长的适宜浓度,浓度为3‰~5‰时对油菜幼苗的生长具有胁迫作用。

关键词: 农民职业化, 农民职业化, 选择意愿, 影响因素, 对策建议

Abstract: Hydroponic experiment were done to investigate the effects of humic acid on growth and physiological characteristics of crops at seedling stage, and the tested material is Cao221167.[Method]The experiment set up different concentrations of humic acid(0;1‰;2‰;3‰;4‰;5‰) to study the effects on the biomass, plant height, root characteristics, chlorophyll content, MDA content and antioxidant enzyme activity of rapeseed seedlings.[Result] The results showed: when the humic acid concentration was 1‰,the biomass of rape seedling was significantly affected(The dry weight and fresh weight of the shoots increased by 18% and 12.20% respectively, and the dry weight and fresh weight of the underground increased by 41.67% and 54.70% respectively). Added humic acid could significantly improve the root activity of rapeseed seedlings; when the concentration was 1 ‰,it can significantly promoted the root growth(root length, total root length and root surface area increased by 20.36%, 70.49% and 30.43% respectively compared with the control). In the range of 1 ‰ ~ 5 ‰, with the increased of humic acid concentration, the activity of antioxidant enzymes in rape cells decreased first and then increased, and the chlorophyll content increased first and then decreased. [Conclusion]So, a certain concentration of humic acid can promote the growth of rape,and 1 ‰ and 2 ‰ concentration of humic acid is the appropriate concentration of rape growth, and when the concentration is 3 ‰ ~ 5 ‰, it inhibits the growth of rape.