The effect of season and management practices on soil microbial activities undergoing nitrogen treatments: interpretation from microcosm to field scale

Rannveig Anna Guicharnaud, Olafur Arnalds, Graeme Ian Paton

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

The warming of Arctic regions is causing higher winter and spring temperatures, less snow cover and intensifying seasonal patterns, which in turn have led to a longer growing season in colder regions. In Iceland the climate has become warmer and wetter with lengthening of the growing season and a corresponding increase in arable production. The aim of this study was to assess the effect of seasons and management practices on soil microbial biomass, nitrification, enzymatic activities and labile C availability. A parallel soil microcosrns study was conducted to identify the key drivers in a controlled environment. Seasons had a more pronounced effect on soil microbial attributes (dehydrogenase activity, soil microbial biomass and labile C) than soil management with microbial attributes being greater in warmer summer months. This was an indication that continuing climate change and corresponding increase in dehydrogenase activity and soil microbial biomass in soils may increase carbon decomposition and hence loss of organic carbon from cultivated soils in Iceland. Management had a greater impact on soil N dynamics than seasons. There was evidence that precipitation promoted immobilisation of NO3--N in soils suggesting that the wetter climate developing in Iceland might reduce the availability of NO3--N to crops. Labile C was a governing factor in soil microbial activity as was demonstrated both in the field and the laboratory.

Original languageEnglish
Pages (from-to)123-134
Number of pages12
JournalIcelandic Agricultural Sciences
Volume23
Publication statusPublished - 2010

Keywords

  • Subarctic soils
  • seasons
  • management
  • nutrient dynamics
  • field to microcosms scale
  • Arctic Tundra soils
  • dissolved organic- matter
  • extraction method
  • mineralization responses
  • dehydrogenase-activity
  • enzyme activities
  • freeze-thaw
  • ecosystem
  • temperature
  • carbon

Cite this

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title = "The effect of season and management practices on soil microbial activities undergoing nitrogen treatments: interpretation from microcosm to field scale",
abstract = "The warming of Arctic regions is causing higher winter and spring temperatures, less snow cover and intensifying seasonal patterns, which in turn have led to a longer growing season in colder regions. In Iceland the climate has become warmer and wetter with lengthening of the growing season and a corresponding increase in arable production. The aim of this study was to assess the effect of seasons and management practices on soil microbial biomass, nitrification, enzymatic activities and labile C availability. A parallel soil microcosrns study was conducted to identify the key drivers in a controlled environment. Seasons had a more pronounced effect on soil microbial attributes (dehydrogenase activity, soil microbial biomass and labile C) than soil management with microbial attributes being greater in warmer summer months. This was an indication that continuing climate change and corresponding increase in dehydrogenase activity and soil microbial biomass in soils may increase carbon decomposition and hence loss of organic carbon from cultivated soils in Iceland. Management had a greater impact on soil N dynamics than seasons. There was evidence that precipitation promoted immobilisation of NO3--N in soils suggesting that the wetter climate developing in Iceland might reduce the availability of NO3--N to crops. Labile C was a governing factor in soil microbial activity as was demonstrated both in the field and the laboratory.",
keywords = "Subarctic soils, seasons, management, nutrient dynamics, field to microcosms scale, Arctic Tundra soils, dissolved organic- matter, extraction method, mineralization responses, dehydrogenase-activity, enzyme activities, freeze-thaw, ecosystem, temperature, carbon",
author = "Guicharnaud, {Rannveig Anna} and Olafur Arnalds and Paton, {Graeme Ian}",
year = "2010",
language = "English",
volume = "23",
pages = "123--134",
journal = "Icelandic Agricultural Sciences",
issn = "1670-567X",
publisher = "Agricultural University of Iceland",

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TY - JOUR

T1 - The effect of season and management practices on soil microbial activities undergoing nitrogen treatments

T2 - interpretation from microcosm to field scale

AU - Guicharnaud, Rannveig Anna

AU - Arnalds, Olafur

AU - Paton, Graeme Ian

PY - 2010

Y1 - 2010

N2 - The warming of Arctic regions is causing higher winter and spring temperatures, less snow cover and intensifying seasonal patterns, which in turn have led to a longer growing season in colder regions. In Iceland the climate has become warmer and wetter with lengthening of the growing season and a corresponding increase in arable production. The aim of this study was to assess the effect of seasons and management practices on soil microbial biomass, nitrification, enzymatic activities and labile C availability. A parallel soil microcosrns study was conducted to identify the key drivers in a controlled environment. Seasons had a more pronounced effect on soil microbial attributes (dehydrogenase activity, soil microbial biomass and labile C) than soil management with microbial attributes being greater in warmer summer months. This was an indication that continuing climate change and corresponding increase in dehydrogenase activity and soil microbial biomass in soils may increase carbon decomposition and hence loss of organic carbon from cultivated soils in Iceland. Management had a greater impact on soil N dynamics than seasons. There was evidence that precipitation promoted immobilisation of NO3--N in soils suggesting that the wetter climate developing in Iceland might reduce the availability of NO3--N to crops. Labile C was a governing factor in soil microbial activity as was demonstrated both in the field and the laboratory.

AB - The warming of Arctic regions is causing higher winter and spring temperatures, less snow cover and intensifying seasonal patterns, which in turn have led to a longer growing season in colder regions. In Iceland the climate has become warmer and wetter with lengthening of the growing season and a corresponding increase in arable production. The aim of this study was to assess the effect of seasons and management practices on soil microbial biomass, nitrification, enzymatic activities and labile C availability. A parallel soil microcosrns study was conducted to identify the key drivers in a controlled environment. Seasons had a more pronounced effect on soil microbial attributes (dehydrogenase activity, soil microbial biomass and labile C) than soil management with microbial attributes being greater in warmer summer months. This was an indication that continuing climate change and corresponding increase in dehydrogenase activity and soil microbial biomass in soils may increase carbon decomposition and hence loss of organic carbon from cultivated soils in Iceland. Management had a greater impact on soil N dynamics than seasons. There was evidence that precipitation promoted immobilisation of NO3--N in soils suggesting that the wetter climate developing in Iceland might reduce the availability of NO3--N to crops. Labile C was a governing factor in soil microbial activity as was demonstrated both in the field and the laboratory.

KW - Subarctic soils

KW - seasons

KW - management

KW - nutrient dynamics

KW - field to microcosms scale

KW - Arctic Tundra soils

KW - dissolved organic- matter

KW - extraction method

KW - mineralization responses

KW - dehydrogenase-activity

KW - enzyme activities

KW - freeze-thaw

KW - ecosystem

KW - temperature

KW - carbon

M3 - Article

VL - 23

SP - 123

EP - 134

JO - Icelandic Agricultural Sciences

JF - Icelandic Agricultural Sciences

SN - 1670-567X

ER -