Effects of root cutting and leaf application of potassium on organic potassium index and content of neutral aromatic substances in tobacco leaves

doi:10.14088/j.cnki.issn0439-8114.2021.14.012

Abstract

Abstract: Field experiments were carried out to study the effects of different agronomic measures on the dynamic changes of potassium content and organic potassium index and the content of neutral aromatic substances in primary flue-cured tobacco leaves after topping treatment, setting blank control（CK）, root cutting（C）, spraying of potassium fertilizer（K）, root cutting and spraying of potassium fertilizer（C+K）. The results showed that, compared with the CK, C, K and C+K treatments slowed down the loss of potassium and the decrease of organic potassium index and the potassium and organic potassium index of C and C + K treatments decreased first and then increased. The content of neutral aromatic substances in tobacco leaves increased by 29.2%, 18.3% and 4.5%, and C treatment had the best effect, followed by K treatment. The results showed that root cutting could effectively slow down the loss of potassium in tobacco leaves and promote the accumulation of potassium in the later stage, and increase the content of neutral aromatic substances in tobacco leaves. Based on the requirements of saving labor and reducing cost, leaf spraying of potassium fertilizer was a feasible technology for potassium extraction and aroma increase in tobacco leaves.

Key words: flue-cured tobacco, neutral aroma components, organic K index, agronomic measure

CLC Number:

S572

WANG Zheng, XU Tian-yang, HUANG Chong-jun, MENG Gang, GUO Zhi-yong, WANG Jia-chun, AO Jin-cheng. Effects of root cutting and leaf application of potassium on organic potassium index and content of neutral aromatic substances in tobacco leaves[J]. HUBEI AGRICULTURAL SCIENCES, 2021, 60(14): 71-75.

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