STRUCTURE AND DYNAMICS OF THE LAND RESOURCES SYSTEM IN THE SHELTER FOREST REGION IN THE NORTH EAST PLAIN
东北平原农田防护林网区土地资源系统结构及动态

The structure and dynamics of land resources system in the shelter forest region in the Northeast Plain is discussed according to the remote sensing and statistical information from the typical profiles and spots. For agricultural utilization, the land resouces system is made up of five components, i.e. man, land resources, water resources, climatic resources and barren land. The local economy depends heavily upon its land resources, especially farm land. Hav-ing been exploited for 50?0 years from 1930's to ]980's, it has already changed from the re-claiming period into the declining period. There is no waste land to be reclaimed. Facing the increase of population and requirements and the decrease of farmland fertility, proper manage-ment of land resources is indispensible if local economic and living level is maintained. It is imperative to make artificial regeneration (highest input) for the land resources and to Iceep fine circle of the system. If only natural regeneration is relied, the system will be changed to vicious circle.