Effects of strip deep loosening on growth，SPAD value and economic characteristics of tobacco planted in dry land in South Anhui

In order to investigate the effects of strip deep loosening on flue-cured tobacco growth，yield and economic value，a field plot experiment was employed to determine the agronomic traits in various stages，yield， economic value，appearance quality evaluation，smoke panel test of tobacco. Results showed that the stripe deep loosening obviously made the development of tobacco leaf，plant height，stem diameter，leaf size and root dry matter weight increased in the later stage，made the proportion of superior tobacco improved by 5.5% and resulted in an increase in economic value as 2 700 Yuan/hm2 compared with the control treatment. According to the tobacco leaf appearance quality evaluation and smoke panel test，the strip deep loosening treatment was much better than the control. Therefore，the stripe deep loosening is an ideal way to improve soil quality，tobacco growth，leaf yield and economic value，that is deserved to be extensively recommended in the future