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Effects of long-term grassland management on the carbon and nitrogen pools of different soil aggregate fractions
- Source :
- Science of The Total Environment. :810-819
- Publication Year :
- 2018
- Publisher :
- Elsevier BV, 2018.
-
Abstract
- Common grassland management practices include animal grazing and the repeated addition of lime and nutrient fertilizers to soils. These practices can greatly influence the size and distribution of different soil aggregate fractions, thus altering the cycling and storage of carbon (C) and nitrogen (N) in grassland soils. So far, very few studies have simultaneously addressed the potential long-term effect that multiple management practices might have on soil physical aggregation. Here we specifically ask whether and how grazing, liming and nutrient fertilization might influence C and N content (%) as well as C and N pools of different soil aggregate fractions in a long-term grassland experiment established in 1991 at Silwood Park, Berkshire, UK. We found that repeated liming applications over 23years significantly decreased the C pool (i.e. gCKg-1 soil) of Large Macro Aggregate (LMA>2mm) fractions and increased C pools within three smaller soil aggregate fractions: Small Macro Aggregate (SMA, 250μm-2mm), Micro Aggregate (MiA, 53-250μm), and Silt Clay Aggregate (SCA
- Subjects :
- geography
Environmental Engineering
geography.geographical_feature_category
Chemistry
04 agricultural and veterinary sciences
010501 environmental sciences
Silt
engineering.material
complex mixtures
01 natural sciences
Pollution
Grassland
Nutrient
Agronomy
Soil pH
Soil water
Grazing
040103 agronomy & agriculture
engineering
0401 agriculture, forestry, and fisheries
Environmental Chemistry
Cycling
Waste Management and Disposal
0105 earth and related environmental sciences
Lime
Subjects
Details
- ISSN :
- 00489697
- Database :
- OpenAIRE
- Journal :
- Science of The Total Environment
- Accession number :
- edsair.doi.dedup.....c798e1bbbe168e67ae63f4b389d41fef