Effects of Different Humic Acid Contents in Substrate on Tobacco Seedling Quality

侯翔文

Chinese Agricultural Science Bulletin ›› 2017, Vol. 33 ›› Issue (28) : 38-43. DOI: 10.11924/j.issn.1000-6850.casb17030070

Effects of Different Humic Acid Contents in Substrate on Tobacco Seedling Quality

  • 侯翔文
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Abstract

To explore the prospect of the application of humic acid in floating system for flue-cured tobacco seedling, and to improve the substrate for enhance the tobacco seedling quality, the effects of different amounts of humic acids on the growth and physiological properties of tobacco seedling were studied by the using of ‘K326’as the material. The results showed that: (1) the application of humic acid in substrate could affect the growth and development of tobacco seedling, which including the stem height, biomass and root shoot ratio of tobacco seedling, and the effect of on the growth of tobacco seedling was increased in the first and the inhibition with the rise of humic acid amount. (2) There was a little affect of application of humic acid on the green stage, but application of humic acid could significantly influence the survival rate of transplanting seedling, and the green stage was the shortest time and the highest survival rate of transplanting seedling when application 30% of humic acid. (3) The application of humic acid in the substrate could affect the value of seedling chlorophyll content, nitrate reductase activity, invertase activity and root activity of the tobacco seedling, and the physiological properties of tobacco seedling were more suitable when the content of humic acid at 30% level. In summary, tobacco seedling quality could be affected by application of humic acid, and the suitable humic acid content could significantly improve the seedling, 30% of humic acid content was the most suitable amount.

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substrate; seedling quality; humic acid; physiological properties

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侯翔文. Effects of Different Humic Acid Contents in Substrate on Tobacco Seedling Quality. Chinese Agricultural Science Bulletin. 2017, 33(28): 38-43 https://doi.org/10.11924/j.issn.1000-6850.casb17030070

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