Abstract: The map of present land use in Mengyang Nature Reserve was drawn by GISmethod. Five indices i.e., abundance, diversity, dominance, fragmentation and isolation were chosen to evaluate the present situation of land use and spatial structure. Monsoon evergreen broad leaved forest is the major land use type, and protected seasonal rainforest is rare. The diversity and fragmentation of spatial structure increase with the disturbance intensity. The isolation value of natural landscape is in direct ratio to the intensity of human activity, while that of disturbed landscape is on the contrary. It is suggested that the division of present function zones is not satisfactory, and should be adjusted.

Key words: Nature reserve, Spatial structure, Land use, heading and flowering stage, physiological characteristics, late rice, low temperature, irrigation, yield