关键词: 双季稻, 熟性, 气候区划, 湖南

Abstract: Based on meteorological data from 97 stations in Hunan Province during 1981-2010，the refined climatic regionalization of double cropping super rice maturity in Hunan Province was studied by using spatial interpolation and other GIS technologies, and selecting active cumulative temperature of 8~22℃ and sunshine hours from late March to October as the index of regionalization. By comparing dynamic climate regionalization of different decadal periods, the paper analyzed the influence of climate change on double cropping super rice planting adaptability. The results showed that the suitable planting area of double cropping super rice in Hunan was very large, the area of late maturing （of early rice） with late maturing （of late rice） was mainly located in southern plains of Hunan. Relative to 1971-2000, the area of late maturing with late maturing, medium maturity with late maturing increased significantly, and expanded northward; the area of medium maturing with medium maturing and early maturing with early-maturing decreased; the area of medium maturing with early maturing changed little; the unsuitable area increased. It is recommended to stabilize the existing acreage and take certain incentives to expand the planting area of double cropping super rice in Xiangjiang River Basin and Dongting Lake district at the same time.

Key words: double cropping rice, maturity, climate regionalization, Hunan Province