Soil Humus Characteristics Of Typical Flue-cured Tobacco Production Regions And Its Effect On Tobacco Leaf Quality

This research is designed for typical type of soil humus in tobacco-producing areas throughout thecountry to study. Select a typical representative of clean aroma type, full-bodied type and moderate typeof three-flavor tobacco-producing areas, to study the different flavor of the tobacco producing areas ofsoil humus composition and characteristics. Focus on the relationships of three kinds of typical flavortobacco producing areas between soil components and of the tobacco leaf quality, and to clarify therelationship between the typical flavor tobacco producing areas of soil humus and leaf quality style. Itwill provide a theoretical basis and technical support for dividing into different flavor of tobaccoproducing areas and highlighting the style and characteristics of the producing areas, the main findingsare as follows:1. The mean of the national tobacco planting area of each component of the soil humus carboncontent: the humus13.44g/kg, humin5.72g/kg, humus acid7.72g/kg, humic acid3.58g/kg, fulvic acid4.41g/kg,HA/FA ratio1.13. The12plant tobacco counties were divided into three categories inaccordance with the tobacco soil humus components and their characteristics. The I class tobaccoDistrict was the medium humus District, this area includes Nanjian, Jiangchuan, Zunyi,Guiding andXuanzhou, mainly in the Southwest, but Xuancheng distributed in the Yangtze River area of tobacco,the mean of humus carbon content is13.84g/kg;The II class tobacco District was the low humus District,including Linqu, Xuchang, Xiangcheng and Mengyin, mainly distributed in the Huang-Huai tobacco,the mean of humus carbon content is of7.65g/kg; Class III tobacco area high humus areas, includingYongding,Jianghua and Guiyang, mainly distributed in Southeast tobacco area, were the highest of allcomponents of this tobacco soil humus, humus carbon content mean21.60g/kg.Humus carbon, humincarbon, humus acid carbon, humic acid carbon and fulvic acid carbon of humus, the difference wassignificant between different soil types. The humus carbon mean of cigarette typical production areas’tobacco soil was the highest,it’s17.33g/kg.Followed by the Luzhou-flavor typical tobacco-producingareas, it’s14.26g/kg.The lowest is intermediate flavor typical tobacco-producing areas, the mean of itshumus carbon content is9.69g/kg2. Compared to high-quality flue-cured tobacco in the middle, the reducing sugar, total sugar,protein of which in10major tobacco-producing areas of are larger in2010, the other ingredients werein the appropriate range. Overall, the chemical composition of the middle leaves of the10majortobacco-producing areas in2010are mostly coordinated. Ten main tobacco producing areas can bedivided into three categories in accordance with the intrinsic chemical composition of tobacco. TheⅠclass included Nanjian, Guiding, Zunyi, Jiangchuan and Xuancheng, mainly distributed in thesouthwest tobacco district. The Ⅱ Class included Linqu, Mengyin, Lingbao and Xiangcheng, mainlydistributed in the Huang-Huai-Hai tobacco district.The III class included Yongding, located in theSouthern tobacco district. Nicotine, total nitrogen, protein, chlorine, the ratio of Nitrogen to nicotine,the ratio of potassium to chlorine in the three flavor typical production areas were extremely significant different, the reducing sugar, total sugar, potassium, the ratio of sugar to alkali in the threeflavor typical production areas existed significant differences. The tobacco sensory quality in threeflavor typical production areas, the aroma quality, the amount of aroma a, flavor, miscellaneous gas,gray, total score were extremely significant differences, the other indicators did not exist significantdifferences.3. The relation between humus components and quality of tobacco leaves was very close.Therewere extremely significant positive correlation between soil humus and tobacco reducing sugar, totalsugar, potassium, the ratio of potassium to chlorine, between soil humus and the ratio of sugar to alkali,Shi Muke value can be also has the remarkable positive correlation. There were extremely significantpositive correlation between humus acid and reducing sugar, total sugar, potassium, the ratio ofpotassium to chlorine, and there was a significant positive correlation with the ratio of sugar to alkali,but it was a significant negative relation with chlorine. HA/FA and Shi Muke value had an extremelysignificant positive relationship, and there was a significant positive correlation with total. Soil humusand smoking aroma quality had an extremely significant positive correlation, and with aftertaste,stimulating had a significant positive correlation, but with the grey existed a significant negativecorrelation. There was extremely significant positive correlation between humus acid and aroma,aftertaste, and there was a significant correlation with stimulated miscellaneous gas, total score.4. Low humus tobacco producing areas can be achieved by applying humus acid fertilizer toimprove the quality of tobacco leaves; Humus substances in tobacco leaf produces a chemicalcomposition of tobacco leaf is relatively appropriate coordination, may be appropriate to use, highhumus tobacco producing areas can not use humus acid fertilizer.