Abstract: In order to improve the soil condition of continuous cropping tobacco, and improve the tobacco yield, output value and quality of flue-cured tobacco,it was planted green manure to continuous cropping soil. The results showed that the overall growth of the tobacco plants treated with green manure （T1,flue-cured tobacco—green fertilizer—flue-cured tobacco, spade in green fertilizer boom period;T2,flue-cured tobacco—green fertilizer—flue-cured tobacco, spade in green manure flowering stage） was better than that of the control tobacco plants（CK,flue-cured tobacco-winter fallow-flue-cured tobacc）. The plant height of the control tobacco plants and the treated T2 tobacco plants was very significant difference, and there was a significant difference to the width of the waist leaf. The plant height, pitch, and foot leaf length of the control tobacco plants were significantly different to the treated T1 tobacco plants. The field disease survey showed that the control tobacco plants disease index and incidence rate of climate spot disease, tomato spotted disease and TMV were the heaviest, T1 was the lightest. The T1 disease index and incidence rate of anthracnose were the lightest, T2 was the heaviest. PVY disease index and incidence rate of the control tobacco plants is the lightest, T2 is the heaviest. The economic characters, appearance quality and the upper leaves chemical quality of flue-cured tobacco by planting green manure were better than those of the control tobacco plants.

Key words: flue-cured tobacco, green manure, continuous cropping, agronomic traits, economic characters, chemical composition