Researches on nutrient return of litterfall in the alpine tundra ecosystem of Changbai Mountains;

Ecology effect of retrieving grassland from grazing on desertification grassland vegetation in Anxi;

The content characteristics on Fe, Mn and Cu in the grassland vegetation of Xilin River Basin;

The advance of technology of remote sensing monitoring for grassland vegetation in China, especially administered by the Ministry of Agriculture of China, is reviewed in this paper.

Since the dominant species of original vegetation and the distribution patterns of the bio-diversities are essential to vegetation recovery and restoration along the Qinghai-Tibetan railway,based on 27 vegetation transects and 248 plots and 2 242 samples,this paper systematically analyzed the patterns of dominant species and bio-diversity.

After investigating and analyzing the flora and vegetation landscape of Grand Canyon Nature Reserve,we found that the original vegetation is diverse,which has the characteristic of transition from south semitropical to middle semitropical;that the flora composition of Grand Canyon Nature Reserve is very complicated,dominated by the tropical-semitropical and tropical vegetation;and .

Among them, potential vegetation is defined as the vegetation that would occur under the current climate condition without any disturbance from human activity, and original vegetation is defined as the vegetation that actually occurred prior to the significant interference from human activity.