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Difference of Non-volatile Organic Acids Content among Tobaccos Planted in Different Types of Soil

YIN Guang-ting1,ZHOU Ji-heng1,KUANG Yong2,HE Yi3, PENG Yan1,MAO Zhen-ping1,XIAO Sui3(1.Research Centre of Tobacco Engineering and Technology,HNAU,Changsha 410128,PRC; 2.Division of Science&Technology,HNAN,Changsha 410128,PRC; 3.Tobacco Administration,Guizhou Tobacco Company,Guiyang 550000,PRC)  
The difference of major non-volatile organic acids content,ratio of sugar to acid in tobacco,which planted in three different soil types in Shidian County,Yunnan province,and their relationships with soil nutrients content in the three different soil types were researched.The results indicated that polybasic organic acids had extremely significant differences among tobacco leaves planted in three different soil types,in which,the content of oxalic acid and malic acid in different soil types was ordered as follows: yellow soilred soilyellow red soil,the content of citric acid was ordered as follows: red soilyellow soilyellow red soil;the tobacco leaf produced from the yellow soil was better than that produced from the other two soil types in quantity and quality of the aroma,it may relate to the nutrients content in the yellow soil.Among all of the higher fatty acids,the contents of lauric acid and myristic acid had significant differences among tobacco leaves planted in three different soil types,but the contents of palmitic acid,linoleic acid,oleic acid and stearic acid showed no significant differences among them.The ratio of sugar to acid in tobacco planted in three different soil types had extremely significant differences,the ratio of the transitional yellow red soil was higher than 2,which exceeded the normal range of the ratio of sugar to acid,and quality of tobacco leaves from this soil type may be worse than that from yellow soil or red soil.
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