Soil microbial biomass properties under typical vegetation types in the Taiyue Mountain of China
In order to understand the effect of vegetation type on soil microbial biomass,this paper investigated the variation of soil microbial biomass with the soil and litter nutrient content in Mt.Taiyue,Shanxi,China.We measured soil microbial biomass and analyzed its correlation with soil physical-chemical properties and litter nutrient content by using path analysis model for Larix principis-rupprechtii Mayr.artificial pure forest (PF),Larch-Betula platyphylla Suk.mixed forests (MF),shrubbery (S) and meadow (M).The results showed that:(1) the content of soil microbial biomass C and N,soil organic carbon (SOC) and total nitrogen (TN) gradually decreased with the soil depth.(2) The content of SOC,TN,MBC and MBN of each layer decreased in the order of M ＞ PF ＞ MF ＞ S.The content of MBC and MBN in M and MF were significantly higher than those in PF and S.(3) The range of MBC/MBN was 6 8 in layers A and B and 4-10 in layers C and D.(4) The soil microbial entropy in MF and S were significantly higher than those in PF and M.(5) Path analysis showed certain degree of correlation between soil microbial biomass and soil physical-chemical properties or litter nutrient content.(6) The vegetation type had an effect on soil microbial biomass,with PF and M the most beneficial to soil carbon contents.
NETL
NSTL
万方数据
维普
