Analysis of Routine Chemical Components and Safety of Flue-cured Tobacco Leaves under Organic Cultivation in Different Ecological Regions of Yunnan Province
AO Jincheng
ZHAO Jianhua
ZHANG Xiaolong
MAO Chuntang
LI Junping
ZHANG Jibing
Abstract：Conventional chemical composition and security features of organic flue-cured tobacco leaves from eight different planting areas in Yunnan province were analyzed based on the data from 2011 to 2012. There was a higher variation in conventional chemical composition of flue-cured tobacco leaves among different ecological areas( CV was between 8. 65% —22. 79% ). Four tobacco leave types were grouped according to the regional characteristics. Down stalk tobacco leaves agreed with the standard;mid-dle and upper stalk tobacco leaves had higher water soluble total sugar content and sugar alkali ratio,but lower total nitrogen,potassium content and alkali nitrogen ratio,with less harmony. The contents of heavy metals,lead,cadmium,arsenic,mercury,chromium were below the standard limit,and no pesticide resi-dues were detected,so the security of tobacco leaves could be concluded. A reference was provided for es-tablishing scientific organic flue-cured tobacco planting techniques. It was suggested that appropriately rai-sing the level of nitrogen and potassium supply during the later period of tobacco organic cultivation was necessary to satisfy the demands of key nutrients for tobacco growing and improve the conventional chemi-cal composition harmony of organic tobacco leaves.
Keywords：flue-cured tobaccoorganic planting moderoutine chemical compositionheavy metalpesticide residuescluster analysisYunnan province
Publication Date：2015-04-02
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 66-71 )