Soil Microbai l Biomass and Enzymes Activity ofP inus tabulaeformis Foer st wti hD ifferent Ag es in Liaohe Rivre of Northre n Hebei
We studied the temporal variation tendency of soil microbial biomass carbon ( MBC ) , microbial biomass nitrogen (MBN), activity of urease, catalase, polyphenol oxidase, and β-glucosidase of Pinus tabulaeformis with different ages in Liao River source region.MBC, MBN, urease, catalase and β-glucosidase in soil of all forest age groups increased gradual-ly from May to August, and then decreased until October .However, soil polyphenol oxidase exhibited the opposite trend . The attenuation degree of enzyme activity delayed than that of MBC and MBN .With the increasing age of P.at blu aeformis forest, MBC, MBN, urease, catalase and β-glucosidase increased , while the polyphenol oxidase decreased .By correlation analysis, MBC and MBN had a statistically significantly positive correlation with the activity of urease , catalase and β-glu-cosidase.However, there was negative correlation between MBC/MBN and polyphenol oxidase .Soil temperature and water content had a significantly positive correlation with all indices .MBC, MBN and enzymes activity of soil were the biological indices to evaluate soil quality of different age groups in P.tabulaeof rmis forest.
NETL
NSTL
万方数据
