Feature Analyse Of Ecological Factors And Flue-cured Tobacco Quality In Areas Of Kunming

On the basis of soil data、meteorological data and flue-cured tobacco data of nine tobacco-growing in Kunming area, around characteristics tobacco of Kunming area, the situations of climate、soil and tobacco were analysised. Using fuzzy membership function model and statistical method climate environment soil fertility and leaves quality were analysised according to different soil type or different county field. Main results were as follows:1、Chemical compositions of flue-cured tobacco in Kunming area is closely related to the factors of climatic、elevation. With temperature be turned higher、sunshine hours be increased and decreased in amount of precipitation, the content of chlorine in the leaves of middle and up tobacco, the content of sulfur in middle tobacco leaves, the content of petroleum ether extract in the upper of tobacco leaves were increased; With the rainly of water increased, the content of nicotine in the middle of tobacco leaves, the content of chlorine、petroleum ether extract in the upper of tobacco leaves were increased. With elevation be turned higher, the content of the total sugar, reducing sugar and magnesium in the middle of tobacco leaves were enhanced.2、The score of sensory evaluation of flue-cured tobacco was influenced by the factors of climatic、elevation in a certain extend. There was significantly positive correlation between sunshine hours and the scores of aroma quantity in the middle and upper of flue-cured tobacco of leaves、irritation and aftertaste in the upper of tobacco of leaves; There was significantly negative correlation between amount of precipitation and the scores of aroma quantity and irritation in the middle and upper of tobacco of leaves、 scores of aftertaste and miscellaneous gas in the upper of tobacco of leaves; There was significantly extremely positive correlation between elevation and the scores of aroma quantity in the upper of tobacco of leaves, there was significantly positive correlation with miscellaneous gas and irritation in the upper of tobacco of leaves.3、Chemical compositiones of flue-cured tobacco is closely related to physical and chemical properties of the soil. With content of total nitrogen and manganese increased,、 content of the iron reduced in soil, content of the total sugar and reducing sugar were improved in the middle and upper of flue-cured tobacco of leaves; With pH value, content of calcium improved and content of total potassium and iron were lower in the soil, the chlorine in the middle and upper of flue-cured tobacco of leaves and content of reducing sugar and starch in the upper of tobacco of leaves were increased; With the content of chlorine increased and content of iron decreased in the soil, the content of calcium was improved in the middle and upper of flue-cured tobacco of leaves; With the content of calcium improved and content of boron reduced in the soil, the content of calcium and sulfur were increased in the middle of tobacco of leaves.4、In the all soil nutrient index, the content of sulfur in the soil is closely related to the scores of sensory evaluation of the middle of flue-cured tobacco leaves, there was significantly positive correlation between the content of sulfur in the soil and the scores of irritation; There was extremely significantly positive correlation between the content of sulfur and scores of miscellaneous gas; There was no significantly correlation between the scores of sensory evaluation of upper tobacco of leaves and the content of each material in the soil.