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Research on Different Sowing Dates and Leaf Removal Times in Floating System of Flue-cured Tobacco

ZENG Hui-yu,XIE Hui-ya,ZHU Lie-shu (Research Center of Tobacco Engineering and Technology,HNAU,Changsha,Hunan,410128,China)  
K326 was used as material to study the effects of different sowing dates and leaf removal times in the floating system on growth and development of flue-cured tobacco in Hengyang,Hunan in 2007~2008.The results indicated that the best sowing date was 11th December and the optimal time of leaf removal was 3 times.Compared to the later sowing date treatments,the proportion of high-quality flue-cured tobacco leaves,yield,output value and the average price in 11th December treatment were increased by 15.3%,430.5 kg/hm2,6250.8 RMB/hm2 and 1.49 RMB/kg,repectively.Compared to no-leaf-removal treatment,the proportion of high-quality flue-cured tobacco leaves,yield,output value and the average price in 11th December treatment were increased by 5.2%,487.5 kg/hm2,6126.45 RMB/hm2 and 0.98 RMB/kg,repectively.
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