Abstract: In the support of GIS technology, climatic and regionalization for lychee with different maturing was performed based on 1980-2009 climate data in Guangdong. The result could provide scientific guidance to Guangdong lychee production layout and variety selection. Based on the relationship of lychee growth and local climate conditions in Guangdong, four climatic division index，including annual average temperature，extreme minimum temperature for multiyears, average temperature in flower bud differentiation critical period and precipitation in flowering and fruiting period，had been established for early，middle and late maturing lychee. Each index had three levels, corresponding to suitable, subsuitable and inappropriate.A spatial analysis model for climate division had been produced in terms of those indexes. Using the spatial model and GIS, a smaller grid calculation was conducted and climate division for early, middle and late maturing lychee was achieved. The result showed that in Guangdong, the midmaturity lychee had largest favorable areas of 6.6653×10⁶ha,〖JP2〗followed by the early maturing variety, it was 5.2745×10⁶ha. Late maturing lychee, which was constrained by temperature and precipitation, had smallest size of suitable area of 4.2525×10⁶ha.

Key words: font-family: 宋体, mso-bidi-font-family: 宋体, mso-font-kerning: 1.0pt, mso-ansi-language: EN-US, mso-fareast-language: ZH-CN, mso-bidi-language: AR-SA">GIS, Lychee, Climate zoning