| Based on the harvesting of standard trees in sample plots, an experiment was conducted to study the biomass and its
correlation factor of Potentilla fruticosa forest in loess hilly region of Qinghai province. The results showed that its biomass ranged from 1608.9 to 26114.7 kg/hm2 in this area and the average biomass is 6766.4 kg/hm2. The ration of the biomass of above ground parts ranged from 37.16% to 69.40%, and the others ranged from 30.60% to 62.84%. It was observed that there was positive correlation between the biomass of above ground parts and the biomass of underground parts. The moisture content of the whole plant ranged from 33.83% to 45.35% and the average moisture content was 40.59%. There was a synergistic phenomenon between its biomass and its coverage, basal diameter, crown width and height. The biomass was affected with the both effection of precipitation and evaporation. The biomass was in negative correlation to the herbaceous coverage. |
