Tillage and residue management effects on arylamidase activity in soils

被引：40

作者：

Acosta-Martínez V. ^{[1
]}

Tabatabai M.A. ^{[1
]}

机构：

[1] Department of Agronomy, Iowa State University, Ames

来源：

Biology and Fertility of Soils | 2001年 / 34卷 / 1期

关键词：

Amidohydrolases; Amino acids; Soil enzymes; Soil management; Soil quality;

D O I：

10.1007/s003740100349

中图分类号：

学科分类号：

摘要：

Recent interest in soil tillage and residue management has focused on low-input sustainable agriculture. This study was conducted to investigate the effect of three tillage systems (no-till, chisel plow, and moldboard plow) and four residue placements (bare, normal, mulch, and double mulch) on a most recently detected enzyme in soils, arylamidase activity. This enzyme catalyzes the hydrolysis of an N-terminal amino acid from peptides, amides, or arylamides. Results showed that arylamidase activity is greatly affected by tillage and crop residue placement. The greatest activity was found with chisel/mulch, moldboard plow/mulch, and no-till/double mulch, and the lowest with moldboard plow/normal and no-till/bare. Arylamidase activity was significantly correlated with organic C (r=0.59**) and soil pHCaCl2 (r=0.55**). and decreased with soil depth. Results of this work suggest that the activity of this enzyme is affected by soil management, and indicate its potential ecological significance because of its role in the N cycle.

引用

页码：21 / 24

页数：3

共 27 条

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