Contributions of soil biota to C sequestration varied with aggregate fractions under different tillage systems

It is increasingly believed that substantial soil organic carbon (SOC) can be sequestered in conservation tillage system by manipulating the functional groups of soil biota. Soil aggregates of different size provide diverse microhabitats for soil biota and consequently influence C sequestration. Our...

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Bibliographic Details
Published in:Soil biology & biochemistry 2013-07, Vol.62, p.147-156
Main Authors: Zhang, Shixiu, Li, Qi, Lü, Ying, Zhang, Xiaoping, Liang, Wenju
Format: Article
Language:English
Subjects:
Agronomy. Soil science and plant productions
Biochemistry and biology
Biological and medical sciences
Chemical, physicochemical, biochemical and biological properties
community structure
conventional tillage
Cropping systems. Cultivation. Soil tillage
equations
Fundamental and applied biological sciences. Psychology
General agronomy. Plant production
Gram-positive bacteria
microaggregates
microbial biomass
Microbial community
microhabitats
mycorrhizal fungi
Nematoda
Nematode community
No tillage
Physical properties
Physics, chemistry, biochemistry and biology of agricultural and forest soils
plant parasitic nematodes
Ridge tillage
Soil aggregates
Soil carbon sequestration
soil nematodes
soil organic carbon
Soil science
Soil tillage
Structure, texture, density, mechanical behavior. Heat and gas exchanges
Tillage. Tending. Growth control
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Summary:It is increasingly believed that substantial soil organic carbon (SOC) can be sequestered in conservation tillage system by manipulating the functional groups of soil biota. Soil aggregates of different size provide diverse microhabitats for soil biota and consequently influence C sequestration. Our objective was to evaluate the contributions of soil biota induced by tillage systems to C sequestration among different aggregate size fractions. Soil microbial and nematode communities were examined within four aggregate fractions: large macroaggregates (>2 mm), macroaggregates (2–1 mm), small macroaggregates (1–0.25 mm) and microaggregates (1 mm aggregate fractions were different from those in 1 mm aggregates, while more gram-positive bacteria and plant-parasitic nematodes might increase C accumulation within
ISSN:0038-0717
1879-3428
DOI:10.1016/j.soilbio.2013.03.023