Abstract: Huyou (Citrus paradisi cv. Changshan Huyou) is a characteristic fruit of high quality and high yield with the origin region protection in Quzhou City. To study the suitability regionalization of Huyou planting is of importance to the development of regional agricultural economy. Based on the geographic data, soil data, and 1971-2008 meteorological data of Quzhou, this paper analyzed the relationships between Huyou yield and meteorological factors, established the comprehensive regionalization indices of Huyou planting, and constructed a regionalization assessment model of Huyou planting by using analytic hierarchy process. The results indicated that the suitable, sub-suitable, and unsuitable regions for Huyou planting in the City occupied 65.47%, 13.12%, and 21.41% of the totalevaluation area, respectively. This regionalization could provide a scientific basis for the layout optimization of cultivation and the structural regulation of improved varieties of Huyou in Quzhou.

Key words: forest gap, edge effect, recalcitrant component, Pinus massoniana plantation.