Comprehensive Evaluation Of Climatic Environment And Flue-cured Tobacco Quality In Tongren Tobacco-growing Aresa

On the basis of Tongren tobacco-growing areas, the flue-cured tobacco quality and eclolgical conditions including climate factors were analyzed. And by applying membership function and estimating weight values for aech index by using the method of principal component analysis,tobacco quality usability,climate feasibility and soil fertility were comprehensively evaluated. Appearance quality index (AQI), physical properties index (PPI), sensory quality index (SQI), chemical component availability index (CCUI) and climate suitability index (CFI)were proposed and estimated. By using the geographic information system (GIS) to influence the spatial analysis method of the flue-cured tobacco growth climate elements spatial interpolation and topographic correction (longitude, latitude, altitude, etc.), tongren smoke zone of the planting region, and the different ecological factors on tobacco chemical component content influence.The main conclusions are as follows:1. Climate resource advantage of flue-cured tobacco in Tongren have field period for the temperature and average daily temperature was20℃continuous days long, rainfall abundant, light hot water the same characteristics, which is beneficial to the growth and development of flue-cured tobacco leaves.Early sowing, early seedling, early transplanting, let the flue-cured tobacco crop growth and climatic conditions forming optimum form a complete set.2.Tongren tobacco-growing areas flue-cured tobacco leaves appearance quality is best, color with golden yellow to dark yellow is given priority to, maturity is higher, blade structure loose, the identity of medium, and good temperament quantity foot, aroma type to sweet scent, middle type and the partial light scent is given priority to, in the organization structure of the gas porosity and tobacco resistance to workability with foreign smoke zone is relatively close to, the chemical component usability basic to achieve high quality tobacco level at home and abroad.3. Tongren tobacco-growing areas flue-cured tobacco identity and irritating, taste and aftertaste significant correlation, and the rest is not significantly related; Nicotine (except aroma quantity outside), total nitrogen (except combustibility external), total sugar, reducing sugar, mixed gas, irritating, taste and aftertaste, flue gas fine flexibility and the evaluation of each index and total absorption significant correlation; Sensory quality between each index closed.System closely, all reached a significant correlation, and at the same time, the index and evaluation of suction total also reached a significant correlation.4. Tongren tobacco-growing areas flue-cured tobacco quality and growth period of sunlight relations close, high temperature become affect yield and quality of flue-cured tobacco main meteorological factors, tobacco main chemical composition and growth closely related to precipitation, July and August temperature,35℃or more days, July-8month precipitation and April to September sunshine hours as tongren smoke zone flue-cured tobacco planting climate suitability zoning index.5. Tongren tobacco-growing areas flue-cured tobacco climate type and tobacco leaf quality have two kinds of typical corresponding relations, namely sweet scent tobacco, among the scent or partial light sweet scent tobacco; tongren smoke zone can be divided into the western warm Summer drought flue-cured tobacco growing areas and eastern warm humid Summer drought flue-cured tobacco growing areas; According to the township (town) flue-cured tobacco planting ecological suitability evaluation, can be divided into4types:advantage stable type, can be expanded type, saturated, unfavorable development-oriented.