title: [Effects of simulated nitrogen deposition on soil enzyme activities in a Betula luminifera plantation in Rainy Area of West China].
abstract: From January 2008 to January 2009, a field experiment was conducted to investigate the effects of simulated nitrogen (N) deposition (0, 5, 15, and 30 g N x m(-2) x a(-1)) on the soil enzyme activities in a Betula luminifera plantation in Rainy Area of West China. As compared with the control (0 g N x m(-2) x a(-1)), simulated N deposition stimulated the activities of soil hydrolases (beta-fructofuranosidase, cellulase, acid phosphatase, and urease) significantly, but depressed the activities of soil oxidases (polyphenol oxidase and peroxidase). These results suggested that the increased exogenous inorganic N could stimulate soil microbial activity and increase the demands of both B. luminifera and soil microbes for C and P, whereas the depress of soil polyphenol oxidase and peroxidase activities under N addition could inhibit the degradation of litter and promote its accumulation in soil, leading to the increase of soil C storage in the B. luminifera plantation ecosystem.
authors.affiliation: College of Forestry, Sichuan Agricultural University, Ya' an 625014 Sichuan, China. iamtlh@163.com
authors.forename: Li-Hua
authors.initials: LH
authors.lastname: Tu
authors.forename: Hong-Ling
authors.initials: HL
authors.lastname: Hu
authors.forename: Ting-Xing
authors.initials: TX
authors.lastname: Hu
authors.forename: Jian
authors.initials: J
authors.lastname: Zhang
authors.forename: Yin-Long
authors.initials: YL
authors.lastname: Xiao
authors.forename: Shou-Hua
authors.initials: SH
authors.lastname: Luo
authors.forename: Ren-Hong
authors.initials: RH
authors.lastname: Li
authors.forename: Hong-Zhong
authors.initials: HZ
authors.lastname: Dai
mesh_terms: D029662:Betula / Q000737:chemistry / Q000254:growth & development*; D002244:Carbon / Q000032:analysis; D002681:China; D003198:Computer Simulation; D017753:Ecosystem; D006867:Hydrolases / Q000378:metabolism*; D009584:Nitrogen / Q000032:analysis*; D010088:Oxidoreductases / Q000378:metabolism*; D009195:Peroxidase / Q000378:metabolism; D018515:Plant Leaves / Q000737:chemistry; D011891:Rain / Q000737:chemistry; D012987:Soil / Q000737:chemistry*
chemical_list: D012987:Soil; D002244:Carbon; D010088:Oxidoreductases; D009195:Peroxidase; D006867:Hydrolases; D009584:Nitrogen