Stabilization of oxidative enzymes in desert soil may limit organic matter accumulation

被引：97

作者：

Stursova, Martina ^{[1
]}

Sinsabaugh, Robert L. ^{[1
]}

机构：

[1] Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA

来源：

SOIL BIOLOGY & BIOCHEMISTRY | 2008年 / 40卷 / 02期

关键词：

soil enzyme activity; phenol oxidase; peroxidase; desert grassland; soil carbon;

D O I：

10.1016/j.soilbio.2007.09.002

中图分类号：

S15 [土壤学];

学科分类号：

0903 ; 090301 ;

摘要：

Phenol oxidase and peroxidase activities in desert grassland soils at the Sevilleta Long Term Ecological Research site in central New Mexico (USA) are far greater than those of temperate soils. Activity is uniformly distributed across particles ranging from > 1 mm to < 38 mu m and is unaffected by autoclaving, in contrast to hydrolase activities. The sorbed enzymes are readily extractable and inactivated by boiling. High soil pH, high stabilized oxidative enzyme activity, and carbonates create optimal conditions for degradation of phenols which increase decomposition potentials and limit soil organic matter accumulation. (C) 2007 Elsevier Ltd. All rights reserved.

引用

页码：550 / 553

页数：4

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