子午岭森林群落土壤水分与生物量关系研究

Study on the Relationship between Soil Moisture and Biomass in Different Forest Community in Ziwuling Area

通过对黄土丘陵区子午岭北部山杨林、白桦林、油松林和辽东栎林植被群落特征的分析,研究了植被演替过程中土壤水分和生物量的变化及其相互关系。结果表明,在植被正向演替过程中,土壤含水量随植被正向演替而逐渐减少,土壤含水量的大小顺序依次为山杨>白桦>油松>辽东栎;土壤含水量对树枝和树干生物量的影响较大,立地条件致使各林分地上生物量发生明显变化;在林龄差距不大的条件下各林分平均单株生物量的大小关系为辽东栎>白桦>山杨>油松。

By research of Populus davidiana , Betulaplatyp hylla , Pinus tabulaeformis and Quercus liaotungensis ＇ community characteristics in hilly-gully regions on the Loess Plateau in north of Ziwuling, the results showed that in the progress of succession, soil moisture content from large to small is Populus davidiana〉Betula plat yp h ylla 〉 P inus tabulae f ormis 〉 Quercus liaotungensis. Soil moisture influenced biomass of trunk and brunch largely. For the difference of terra condition and distribution,forest community ground biomass changed prominently. Under the condition of the four forest community＇s age nearly the same,the order of different forests ground biomass of single tree is Quercus liaotungensis 〉Betula platyp h ylla 〉 Populus davidiana 〉 P inus tabulae f ormis.