Effects of shading at different growth stages on the growth, development and quality of tobacco.

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Effects of shading at different growth stages on the growth, development and quality of tobacco.

YANG Xing-you^1,3; LIU Guo-shun¹; WU Ren-jun²; XIA Lin²; XING Xiao-jun⁴; ZHANG Jian-hui⁴; DU Wei-min²; XIE Liang-wen²

¹National Tobacco Cultivation & Physiology Biochemistry Research Center , Zhengzhou 450002, China;²Sichuan Tobacco Corporation, Chengdu 610031, China;³Dazhou Branch of Sichuan Tobacco Corporation, Dazhou 635000, Sichuan, China;⁴Liangshan Branch of Sichuan Tobacco Corporation, Xichang 615000 , Sichuan, China

Received:2006-07-28 Revised:1900-01-01 Online:2007-07-10 Published:2007-07-10

Abstract

Abstract: A pot experiment was conducted in 2004-2005 to investigate the effects of shading at different growth stages on the growth, development and quality of tobacco. The results showed that under shading, the dry matter accumulation of tobacco plant reduced, leaf blade became thinner, pigment content increased, and maturing time prolonged. The invertase activity decreased under shading, but increased after the shading removed. For flue-cured tobacco leaf, shading reduced its thickness and specific mass, increased its leaf stem and the contents of nicotine and total nitrogen and potassium, decreased its total sugar and reducing sugar contents, and increased its aromatic components. The effects of shading were decreased in the order of maturing stage>vigorous growth stage>root elongation stage.

Key words: UV-B radiation, Acer davidii, Physiological response

YANG Xing-you^1,3; LIU Guo-shun¹; WU Ren-jun²; XIA Lin²; XING Xiao-jun⁴; ZHANG Jian-hui⁴; DU Wei-min²; XIE Liang-wen². Effects of shading at different growth stages on the growth, development and quality of tobacco.[J]. cje.

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Effects of shading at different growth stages on the growth, development and quality of tobacco.

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