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A new equation to simulate the contact between soil and maize residues of different sizes during their decomposition
- Source :
- Biology and Fertility of Soils, Biology and Fertility of Soils, Springer Verlag, 2014, 50, pp.645-655. ⟨10.1007/s00374-013-0876-5⟩
- Publication Year :
- 2014
- Publisher :
- HAL CCSD, 2014.
-
Abstract
- The availability of soil nutrients, which are recycled through the decomposition of crop residues, is important for the management of cropped soils. However, knowledge regarding the influence of contact between crop residues and soil on the dynamics of carbon (C) and nitrogen (N) in soil is limited. In particular, the effect of particle size on decomposition is not well-known, and conceptual approaches for modelling the soil-residue contact in a decomposition model remain scarce. Therefore, we analysed and modelled the effect of maize stem particle length on decomposition. We incubated maize stem residues with particle sizes of 0.02, 0.5, 2 and 5 cm in length in a loamy soil at 25 °C over 301 days. We continuously measured the mineralisation of C and N and determined the chemical evolution of the remaining particles. We used the decomposition model CANTIS which takes into account the soil-residue contact, using a contact factor, KMZ. The decomposition rates of smaller maize particles were higher than those of larger particles during the early phases of decomposition. However, these differences were not maintained after 301 days. These results suggest that a larger size of the maize particles only slowed the rate of mineralisation in the short term but did not modify decomposition in the medium term. We proposed a new formalism for expressing the changes in soil-residue contact with different particle sizes. The contact factor KMZ was calculated using the standardised specific surface area and can be applied more widely to residues that differ in morphology and density.
- Subjects :
- [SDV.SA]Life Sciences [q-bio]/Agricultural sciences
Crop residue
Soil Science
chemistry.chemical_element
Soil science
010501 environmental sciences
01 natural sciences
Microbiology
nitrogen
soi-residue contact
chemical composition
0105 earth and related environmental sciences
2. Zero hunger
model
carbon mineralisation
04 agricultural and veterinary sciences
[CHIM.MATE]Chemical Sciences/Material chemistry
15. Life on land
Nitrogen
Decomposition
particle-size
chemistry
Agronomy
Loam
Soil water
040103 agronomy & agriculture
0401 agriculture, forestry, and fisheries
Particle
Particle size
[SDE.BE]Environmental Sciences/Biodiversity and Ecology
Agronomy and Crop Science
Carbon
Subjects
Details
- Language :
- English
- ISSN :
- 01782762 and 14320789
- Database :
- OpenAIRE
- Journal :
- Biology and Fertility of Soils, Biology and Fertility of Soils, Springer Verlag, 2014, 50, pp.645-655. ⟨10.1007/s00374-013-0876-5⟩
- Accession number :
- edsair.doi.dedup.....32d82221697f4294a828267ff65d6d57