Abstract:

To utilize reasonably climatic resources in Jilin city and improve tobacco productivity, a quantitative assessment of climatic suitability was carried out for formulating the optimized adjustment scheme for flue-cured tobacco cultivation (TC).Based on the data of tobacco yield, meteorological condition, elevation, climatic effects on tobacco, supply and demand relationships of climate resources, climatic factors affecting TC were determined.Fuzzy mathematic method was used to build the membership function of TC suitability and comprehensive evaluation model.Considering the relationships between altitude, longitude, and weather conditions, geographical distribution patterns of climatic factors were set up, and then, refined climatic regionalization for TC in Jilin city was achieved based on the GIS platform.The results show that most regions in Jilin city are suitable for TC, but there are regional differences in climatic suitability which can be divided into four types including the most suitable, the suitable, the sub-suitable, and the unsuitable areas.The east and south regions with the altitude ranged from 500 to 800 m are suitable for TC.However, the regions with an altitude over 800 m and low temperature are unsuitable for TC.Mountain and plain area in the west Jilin city are low suitability areas for TC.Jiaohe city has the largest area suitable for TC, followed by Huadian, and Panshi and Shulan cities are also suitable for TC.The result of flue-cured tobacco regionalization is consistent with the local planting area, but there still are a large space for optimization and adjustment and the potential for increasing yield and income for tobacco production in Jilin city.

Key words: Flue-cured tobacco, Suitability, GIS, Regionalization