Abstract: In agriculture and forestry,losses are often caused by unsuitable soil,climate,or natural disaster,while natural resources are not fully used.Based on data of 30 years' climate information,characteristics of geomorphology,soil,and ecological environment were collected for 89 demonstration counties in Dongting Rivers (Hunan area).Based on the results,5 ecological type regions.In Dongting River (Hunan area) were categorized.The water and temperature conditions,land forms and ecological environment concerning the distribution of 26 species of trees and grass were analyzed.Different suitable region for planting 26 species of trees were identified:the most suitable ecological type regions,more suitable ecological type region,and suitable ecological type region. In each ecological type region, important planting trees and grass were identified.

Key words: North Hebei plateau, Land-use change, Habitat effect, Land quality, Agriculture-pasture ecotone in north Hebei