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Impacts of zero tillage on soil enzyme activities, microbial characteristics and organic matter functional chemistry in temperate soils

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Title Impacts of zero tillage on soil enzyme activities, microbial characteristics and organic matter functional chemistry in temperate soils
Not Available
 
Creator Mangalassery, S.
Mooney, S.J.
Sparkes, D.
Fraser, W.
Sjögersten, S.
 
Subject Carbon sequestration Microbial biomass carbon Greenhouse gases Soil enzymes Soil organic matter Soil microbial functional diversity
 
Description Not Available
Zero tillage management of agricultural soils has potential for enhancing soil carbon (C) storage and
reducing greenhouse gas emissions. However, the mechanisms which control carbon (C) sequestration in
soil in response to zero tillage are not well understood. The aim of this study was to investigate the links
between zero tillage practices and the functioning of the soil microbial community with regards to C
cycling, testing the hypothesis that zero tillage enhances biological functioning in soil with positive
implications for C sequestration. Specifically, we determined microbial respiration rates, enzyme activities,
carbon source utilization and the functional chemistry of the soil organic matter in temperate well
drained soils that had been zero tilled for seven years against annually tilled soils. Zero tilled soils
contained 9% more soil C, 30% higher microbial biomass C than tilled soil and an increased presence of
aromatic functional groups indicating greater preservation of recalcitrant C. Greater CO2 emission and
higher respirational quotients were observed from tilled soils compared to zero tilled soils while microbial
biomass was 30% greater in zero tilled soils indicating a more efficient functioning of the microbial
community under zero tillage practice. Furthermore, microbial enzyme activities of
dehydrogenase, cellulase, xylanase, b-glucosidase, phenol oxidase and peroxidase were higher in zero
tilled soils. Considering zero tillage enhanced both microbial functioning and C storage in soil, we suggest
that it offers significant promise to improve soil health and support mitigation measures against climate
change.
Not Available
 
Date 2019-06-03T09:33:45Z
2019-06-03T09:33:45Z
2015-03-07
 
Type Research Paper
 
Identifier Mangalassery, S., Mooney, S.J., Sparkes, D., Fraser, W., Sjögersten, S., 2015. Impacts of zero tillage on soil enzyme activities, microbial characteristics and organic matter functional chemistry in temperate soils. European Journal of Soil Biology 68, 9-17.
164-5563
http://krishi.icar.gov.in/jspui/handle/123456789/20057
 
Language English
 
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Publisher Not Available