THE ZONAL CHARACTER OF VEGETATION CONSTRUCTION ON LOESS PLATEAU
黄土高原林草植被建设的地带性特征

The following study aimed at constructing vegetation, according to zonal distribution orderliness of vegetation and measured data by studying the zone character of ecological conditions and water utilization by vegetation. The key techniques and principles of plant sociology followed in vegetation construction on Loess Plateau, were a) to construct vegetation in different zone according to zonal distribution law of natural vegetation b) to select the dominant plants of zonal vegetation as main species for establishing woodland or grassland c) to simulate natural vegetation structure and d) to carry out compound layer mixed cropping of trees, shrubs and grasses so as to construct a stable vegetation. The principle that afforestation for a site should be carried out with suitable trees is effective in most of the cases but not all. Beside this, we propose to choose a suitable plant community other than trees for a site in terms of afforestation.