关键词: 种群动态, 种群动态

Abstract: In order to study the climate characteristics of Jiangxi flue-cured tobacco production regions and their suitability to flue-cured tobacco production. From climate data of Jiangxi meteorological department, the author selected were data of 16 tobacco producing counties in recent 40 years (1970-2010). Focusing on average temperature, rainfall and sunshine hours, the author discussed the climate characteristics of Jiangxi tobacco producing regions; based on Jiangxi tobacco production season, compared the climate features of various counties during tobacco production season and the differences with those of other tobacco production regions in China and abroad. The assessment showed that: Jiangxi Province had a warm climate, yearly average temperature was 18.82℃, sunshine hour was 1623.11 h, rainfall was 1632.14 mm, was suitable for tobacco production. However, low temperature at the beginning of the production season, high temperature and too much rainfall during the maturing period might appear occasionally, which would be detrimental to tobacco growth and leaf quality. The average temperature of flue-cured tobacco growing season in Jiangxi Province was close to that of USA flue-cured production region, higher than that of Yuxi (Yunnan), Sanming (Fujian), Brazil and Zimbabwe, but Jiangxi Province had lowest temperature during seedling period, highest temperature during maturing period; the average sunshine hours of flue-cured tobacco growing season in Jiangxi Province was a bit more than those of Sanming (Fujian), but less than those of Brazil, Yuxi (Yunnan) and Zimbabwe, much less than those of USA flue-cured production region; the average rainfalls of flue-cured tobacco total field growth period and maturing period in Jiangxi Province were about the same as those of Sanming (Fujian), much higher than those of Brazil, Zimbabwe, USA and Yuxi (Yunnan). Jiangxi province had a warm climate, with enough sunshine, abundant rainfall and long frost-free period, and was suitable for tobacco production. Occasionally, there might appear low temperature and little sunshine at the beginning of the production season, high temperature and burning sunshine, or too much rainfall and severe flood during the maturing period. Comparing it with those of famous tobacco production regions in China and abroad, Jiangxi climate had its distinct features. Tobacco production practices should be carefully adopted to foster the strengths and circumvent weaknesses, preventative measures should be arranged to avoid the losses caused by abnormal climate conditions.