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《Chinese Tobacco Science》 2002-04
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Effects of topping technology on leaf yield,quality and alkaloid content of flue-cured tobacco

Lin Guihua 1 Zhou Jiheng 2 Fan Qifu 3 Yang Hongqi 2 Cao Ruixuan 3 (1Longyan Tobacco Company of Fujian Province Longyan3640002Institute of Economics and Technology of USTC3Changting Tobacco Company of Fujian Province)  
The effects of different topping times on tobacco leaf quality,yield and alkaloid of main flue-cured tobacco varieties:K326,Yunyan85and CB-1in southeast production area were studied by field plot ex-periments.The effects of different topping times on agronomy properties,top leaf,shape of tobacco plant,leaf quality and contents of alkaloids were analyzed.The results showed that delaying topping time properly can speed the mature of leaves,stimulate plant growth,increase length between nodes,improve the photo-synthesis and ventilation of lower part leaves,hasten middle part growth of tobacco plant.Topping reduces the leaf number and density of upper part,produces leaves with good qualities,such as thickness moderate and texture loosen,both nicotine and proportion of minor alkaloid and total alkaloid reduced.Meanwhile the irritating was also reduced.The usability of all leaves especially the upper part leaves were significant-ly increased.
【CateGory Index】: S572
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