Abstract:By means of the standard-timber harvesting methods, the bicycled quantities and bio-cycle patterns of nutrient elements and the stand biomass in Quercus liaotungensis forest, Pinus tabulaeformis forest and artifical Robinia pseudoacacia forest, the dominant communities in warm temperate zones were studied with Ziwulin Mountain lying in Hilly Loess Regions as the research area. The results show that the total biomass, was 86.247 t/hm~2 in Pinus tabulaeformis forest, 129.005 t/hm~2 in Quercus liaotungensis fo...