Effects of foliar spraying of different regulators on quality of tobacco leaves

doi:10.14088/j.cnki.issn0439-8114.2020.14.021

Abstract

Abstract: In order to improve tobacco quality, the comparative test was conducted in Luoning county and Biyang county of Henan province to study the effects of foliar spraying of different regulators （chitosan oligosaccharide, xylo-oligosaccharide, potassium dihydrogen phosphate, potassium nitrate, fulvic acid potassium salt） on quality of tobacco leaves. The results showed that, compared with CK, except treatment T6（fulvic acid potassium salt） in Luoning county, foliar spraying of different regulators promoted leaf development and increased leaf area. Compared with CK in both testing points, foliar spraying of different regulators increased the yield but the differences were not significant. The output value of Luoning county and Biyang county increased by 2.4%~20.2% and 6.6%~20.6%,respectively. The average price and high grade leaf proportion of treatment T4（potassium dihydrogen phosphate） were highest in the two testing points. Compared with CK, the potassium content of middle leaves with regulator application were increased and the potassium content of treatment T4 were highest in the two testing points. The nicotine and chlorine content of regulator application treatments decreased while the potassium content increased. The potassium content of cured leaves with treatment T3（xylo-oligosaccharides） were highest in the two testing points and the potassium content were 1.99% and 2.15%, respectively. Foliar spraying of different regulators could increase leaf area, yield, output value and quality of tobacco leaves. Among different treatments, treatment T3 and treatment T4 were better.

Key words: foliar spraying, regulator, flue-cured tobacco, quality, potassium

CLC Number:

S572

DONG Kun-le, MAO Jia-wei, KONG De-hui, ZHANG Xiang, ZHAO Hao-bin, HE Lei, LI Liang, SI Xian-zong, SUO Yan-yan. Effects of foliar spraying of different regulators on quality of tobacco leaves[J]. HUBEI AGRICULTURAL SCIENCES, 2020, 59(14): 108-111.

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