关键词: 烤烟, 木醋液, 品质, 抗病性

Abstract:

Pyroligneous acid can promote plants growth and improve their resistance to diseases. In order to study the relationship between different pyroligneous acid application method with tobacco quality and diseases control, this paper studied the effects of different pyroligneous acid concentrations by leaf surface spraying and root irrigation treatment on tobacco quality and disease control through field experiment. The results indicated that all kinds of treatments could improve tobacco quality in different degrees, increase tobacco yield, control tobacco diseases and reduce its disease occurrence rate. Leaf surface spraying (400 times) + root irrigation (1 000 times) could increase the contents of total sugar and reducing sugar; promote neutral aroma accumulation; upgrade neutral aroma quality of tobacco leaf; the tobacco potassium content and single-leaf weight were improved by spying pyroligneous acid (500 times), the tobacco yield was increased. Pyroligneous acid could moderate chemical components in tobacco, reduce the contents of nicotine and total nitrogen. Pyroligneous acid treatment has played an important role in producing flue-cured tobacco with high quality and high yield.

Key words: flue-cured tobacco, pyroligneous acid, quality, disease-resistant