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农学学报 ›› 2022, Vol. 12 ›› Issue (7): 45-49.doi: 10.11923/j.issn.2095-4050.cjas2020-0183

所属专题: 生物技术 烟草种植与生产

• 林学/园艺/园林/食用菌 • 上一篇    下一篇

腐殖酸基质对烟苗生长及根系形态特征的影响

樊俊1(), 王瑞1(), 徐大兵2, 谭军1   

  1. 1湖北省烟草公司恩施州公司,湖北恩施 445000
    2湖北省农业科学院植保土肥研究所,武汉 430070
  • 收稿日期:2020-08-24 修回日期:2021-09-15 出版日期:2022-07-20 发布日期:2022-09-20
  • 通讯作者: 王瑞 E-mail:fanjunwhy@163.com;wangrui1999@126.com
  • 作者简介:樊俊,男,1985年出生,湖北荆州人,高级农艺师,博士,研究方向:植烟土壤修复与废弃物资源化利用。通信地址:445000 湖北省恩施市市府65号 烟叶技术中心,Tel:0718-8211709,E-mail: fanjunwhy@163.com
  • 基金资助:
    湖北省烟草公司科技项目“农业废弃物替代育苗基质技术研究与应用”(027Y2019-009)

Effects of Different Humic Acid Contents in Substrates on Growth and Root Morphological Characteristics of Tobacco Seedling

FAN Jun1(), WANG Rui1(), XU Dabing2, TAN Jun1   

  1. 1Enshi Prefecture Company of Hubei Provincial Tobacco Corporation, Enshi 445000, Hubei, China
    2Institute of Plant Protection and Soil and Fertilizer, Hubei Academy of Agricultural Sciences, Wuhan 430070, Hubei, China
  • Received:2020-08-24 Revised:2021-09-15 Online:2022-07-20 Published:2022-09-20
  • Contact: WANG Rui E-mail:fanjunwhy@163.com;wangrui1999@126.com

摘要:

为探索腐殖酸在烟草育苗中的应用效果,采用托盘育苗的方法,研究基质不同腐殖酸添加量(0、0.5、1.0、1.5、2.0 g/株)对烟苗生长及根系形态特征的影响。结果表明,随着基质中腐殖酸用量的增加,烟苗成苗率、壮苗指数、生物量、株高、茎粗、叶长及叶宽呈先增加再降低的趋势,在1.0~1.5 g/株达到最大值,其中烟苗成苗率达到92.3%,较对照增加了3.6个百分点;壮苗指数达到1.05,较对照增加16.7%。适量腐殖酸提高了烟苗根系表面积、平均直径、根系体积及各级根系总长。综合比较,育苗基质中添加腐殖酸能有效改善根系形态特征、提高烟苗的整体素质,最适宜的腐殖酸添加量为1.0~1.5 g/株(基质腐殖酸总含量为28.8%~34.4%)。

关键词: 腐殖酸, 基质, 烟苗, 壮苗指数, 根系形态

Abstract:

To explore the application effects of humic acid on tobacco seedling, different amounts of humic acid (0, 0.5, 1.0, 1.5, 2.0 g/plant) were added to the substrate and the growth and morphological characteristics of tobacco seedlings were studied with the method of tray seedling culture. The results showed that the tobacco seedling rate, strong seedling index, biomass, plant height, stem diameter, leaf length and width increased first and then decreased with the increase of humic acid in the substrate, and reached the maximum in the treatment of 1.0 to 1.5 g/plant. And the seedling rate and the strong seedling index reached 92.3% and 1.05, increased by 3.6 percentage points and 16.7% compared with those of the control, separately. In addition, humic acid in the substrate improved the root surface area, average diameter, root volume and the total length of roots at all levels. According to the comprehensive comparison, humic acid could effectively improve the root morphological characteristics and the overall quality of tobacco seedlings, and the optimal amount of humic acid added in the substrate is 1.0-1.5 g/plant (the total content of pure humic acid is 28.8%-34.4%).

Key words: humic acid, substrate, tobacco seedling, strong seedling index, root morphology

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