Amino acid dynamics across a grassland altitudinal gradient

被引：32
作者：
Farrell, Mark [1 ,2 ]
Macdonald, Lynne M. [2 ]
Hill, Paul W. [1 ]
Wanniarachchi, Sudas D. [3 ]
Farrar, John [1 ]
Bardgett, Richard D. [4 ]
Jones, Davey L. [1 ]
机构：
[1] Bangor Univ, Coll Nat Sci, Sch Environm Nat Resources & Geog, Bangor LL57 2UW, Gwynedd, Wales
[2] CSIRO Land & Water Sustainable Agr Flagship, Glen Osmond, SA 5064, Australia
[3] Univ Ruhuna, Fac Agr, Dept Soil Sci, Kamburupitiya, Sri Lanka
[4] Univ Manchester, Fac Life Sci, Manchester M13 9PT, Lancs, England
来源：
SOIL BIOLOGY & BIOCHEMISTRY | 2014年 / 76卷
基金：
英国自然环境研究理事会;
关键词：
DON; Dissolved organic carbon; Nitrogen mineralization; Soil organic matter; NITROGEN MINERALIZATION; SOIL; COMMUNITIES; BACTERIAL;
D O I：
10.1016/j.soilbio.2014.05.015
中图分类号：
S15 [土壤学];
学科分类号：
0903 ; 090301 ;
摘要：
Amino acids (AAs) have been the focus of an increasing amount of research in relation to nitrogen fluxes in soils. We use five temperate grassland sites across an altitudinal gradient to establish relationships between soil properties and the size of individual AA pools and their mineralisation rate. Soil and soil solution chemistry, vegetation and microbial community structure, and standing concentrations of free- and peptide-AAs, were quantified. Mineralisation of AAs was universally rapid (t(1/2) < 5 h). We found no relationship between standing AA pool chemistry and rate of AA mineralisation. Instead, soil pH and total microbial biomass, and vegetation community structure were most strongly related to AA turnover rate, highlighting the regulatory role of pH on soil microbial function. (C) 2014 Elsevier Ltd. All rights reserved.
引用
收藏
页码：179 / 182
页数：4
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