Soil extracellular enzyme activities, soil carbon and nitrogen storage under nitrogen fertilization [electronic resource] : A meta-analysis

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Ngôn ngữ: eng

Ký hiệu phân loại: 332.7 Credit

Thông tin xuất bản: Washington, D.C. : Oak Ridge, Tenn. : United States. Dept. of Energy. Office of Science ; Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy, 2016

Mô tả vật lý: Size: p. 32-43 : , digital, PDF file.

Bộ sưu tập: Metadata

ID: 263422

 Nitrogen (N) fertilization affects the rate of soil organic carbon (SOC) decomposition by regulating extracellular enzyme activities (EEA). Extracellular enzymes have not been represented in global biogeochemical models. Understanding the relationships among EEA and SOC, soil N (TN), and soil microbial biomass carbon (MBC) under N fertilization would enable modeling of the influence of EEA on SOC decomposition. Based on 65 published studies, we synthesized the activities of ?-1,4-glucosidase (AG), ?-1,4-glucosidase (BG), ?-d-cellobiosidase (CBH), ?-1,4-xylosidase (BX), ?-1,4-N-acetyl-glucosaminidase (NAG), leucine amino peptidase (LAP), urease (UREA), acid phosphatase (AP), phenol oxidase (PHO), and peroxidase (PEO) in response to N fertilization. Here, the proxy variables for hydrolytic C acquisition enzymes (C-acq), N acquisition (N-acq), and oxidative decomposition (OX) were calculated as the sum of AG, BG, CBH and BX
  AG and LAP
  PHO and PEO, respectively.
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