Impact of Ecological Conditions, Varieties, Cultivation Measures and Their Interactions on the Main Chemical Components of Flue-cured Tobacco

doi:10.11924/j.issn.1000-6850.casb14120167

Abstract

Abstract: In order to indicate the effects of ecological conditions, varieties, cultivation measures and their interactions on reducing-sugar, nicotine and total nitrogen contents of flue-cured tobacco leaf, the differences of chemical components from different grade were investigated in Henan, Shandong and Shaanxi. The experiments showed the following results: the CV of the main chemical composition of flue-tobacco was the largest between ecological conditions, and least between varieties, cultivation measures. The effects of ecological conditions, varieties, cultivation measures and their interactions on reducing- sugar, nicotine and total nitrogen were significant. But their contribution rates were different. Ecological contribution rate was 53.92%, 24.33% and 77.41%, respectively, while the contribution rate of varieties, cultivation measures and their interactions were small. Rainfall and sunshine hours in tobacco vigorous growth stage and tobacco mature stage were major climate factors closely related to the contents of reducing-sugar, nicotine of tobacco leaves during their growth period. And, sunshine hours in tobacco rooting stage, vigorous growth stage and mature stage were the climate factors related to the contents of total nitrogen. Above all, effects of ecological conditions on the chemical composition of tobacco leaves are greater than that of the varieties and cultivation measures. Ecological conditions are the main factors that affect the chemical components contents of tobacco leaves. Rainfall and sunshine hours are the main factors closely related to the contents of tobacco chemical components during the whole tobacco growth periods.

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