The bio-cycle patterns of nutrient elements and stand biomass in forest communities in Hilly Loess Regions
黄土丘陵区主要林分生物量及营养元素生物循环特征

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...