Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates

Lancaster Environment Centre

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Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates. / Singh, Mandeep; Sarkar, Binoy; Bolan, Nanthi S. et al.
In: Journal of Hazardous Materials, Vol. 374, 15.07.2019, p. 11-19.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Singh, M, Sarkar, B, Bolan, NS, Ok, YS & Churchman, GJ 2019, 'Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates', Journal of Hazardous Materials, vol. 374, pp. 11-19. https://doi.org/10.1016/j.jhazmat.2019.03.135

APA

Singh, M., Sarkar, B., Bolan, N. S., Ok, Y. S., & Churchman, G. J. (2019). Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates. Journal of Hazardous Materials, 374, 11-19. https://doi.org/10.1016/j.jhazmat.2019.03.135

Vancouver

Singh M, Sarkar B, Bolan NS, Ok YS, Churchman GJ. Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates. Journal of Hazardous Materials. 2019 Jul 15;374:11-19. doi: 10.1016/j.jhazmat.2019.03.135

Author

Singh, Mandeep ; Sarkar, Binoy ; Bolan, Nanthi S. et al. / Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates. In: Journal of Hazardous Materials. 2019 ; Vol. 374. pp. 11-19.

Bibtex

@article{fbbca6e6a47441028f3bbe1c89e0b4d6,

title = "Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates",

abstract = "The interactive effects of the types and contents of soil clay fractions (SCFs) and plant-residue addition rates on soil organic carbon (SOC) stabilisation are largely unknown. We conducted incubation experiments by amending a sandy soil sample with kaolinitic-illitic, smectitic and allophanic SCFs and adding wheat residues to the mineral mixtures to compare their C stabilisation capacity. The rate of carbon (C) decomposition was higher in the kaolinitic-illitic SCF followed by smectitic and allophanic clay minerals. The supply of easily degradable C substrate from decomposing residues markedly influenced the SCFs{\textquoteright} abilities to stabilise SOC. The removal of sesquioxides from the SCFs significantly decreased their C stabilisation capacity, which coincided with a decrease in the dehydrogenase activity of the mineral-residue mixture. The allophanic SCF showed the least microbial activity and the greatest C stabilisation due to having a higher proportion of micropores (75%). The high C stabilisation capacity of allophanic SCF could also be explained by its high specific surface area (119 m2 g−1). The results of this study are helpful to understand the role of various SCFs in stabilising added C originating from external wheat residue addition but warrant further validation under field conditions.",

keywords = "Microbial activity, Organic carbon stabilisation, Respiration, Soil clay fractions, Wheat plant residue",

author = "Mandeep Singh and Binoy Sarkar and Bolan, {Nanthi S.} and Ok, {Yong Sik} and Churchman, {Gordon Jock}",

year = "2019",

month = jul,

day = "15",

doi = "10.1016/j.jhazmat.2019.03.135",

language = "English",

volume = "374",

pages = "11--19",

journal = "Journal of Hazardous Materials",

issn = "0304-3894",

publisher = "Elsevier",

}

RIS

TY - JOUR

T1 - Decomposition of soil organic matter as affected by clay types, pedogenic oxides and plant residue addition rates

AU - Singh, Mandeep

AU - Sarkar, Binoy

AU - Bolan, Nanthi S.

AU - Ok, Yong Sik

AU - Churchman, Gordon Jock

PY - 2019/7/15

Y1 - 2019/7/15

N2 - The interactive effects of the types and contents of soil clay fractions (SCFs) and plant-residue addition rates on soil organic carbon (SOC) stabilisation are largely unknown. We conducted incubation experiments by amending a sandy soil sample with kaolinitic-illitic, smectitic and allophanic SCFs and adding wheat residues to the mineral mixtures to compare their C stabilisation capacity. The rate of carbon (C) decomposition was higher in the kaolinitic-illitic SCF followed by smectitic and allophanic clay minerals. The supply of easily degradable C substrate from decomposing residues markedly influenced the SCFs’ abilities to stabilise SOC. The removal of sesquioxides from the SCFs significantly decreased their C stabilisation capacity, which coincided with a decrease in the dehydrogenase activity of the mineral-residue mixture. The allophanic SCF showed the least microbial activity and the greatest C stabilisation due to having a higher proportion of micropores (75%). The high C stabilisation capacity of allophanic SCF could also be explained by its high specific surface area (119 m2 g−1). The results of this study are helpful to understand the role of various SCFs in stabilising added C originating from external wheat residue addition but warrant further validation under field conditions.

AB - The interactive effects of the types and contents of soil clay fractions (SCFs) and plant-residue addition rates on soil organic carbon (SOC) stabilisation are largely unknown. We conducted incubation experiments by amending a sandy soil sample with kaolinitic-illitic, smectitic and allophanic SCFs and adding wheat residues to the mineral mixtures to compare their C stabilisation capacity. The rate of carbon (C) decomposition was higher in the kaolinitic-illitic SCF followed by smectitic and allophanic clay minerals. The supply of easily degradable C substrate from decomposing residues markedly influenced the SCFs’ abilities to stabilise SOC. The removal of sesquioxides from the SCFs significantly decreased their C stabilisation capacity, which coincided with a decrease in the dehydrogenase activity of the mineral-residue mixture. The allophanic SCF showed the least microbial activity and the greatest C stabilisation due to having a higher proportion of micropores (75%). The high C stabilisation capacity of allophanic SCF could also be explained by its high specific surface area (119 m2 g−1). The results of this study are helpful to understand the role of various SCFs in stabilising added C originating from external wheat residue addition but warrant further validation under field conditions.

KW - Microbial activity

KW - Organic carbon stabilisation

KW - Respiration

KW - Soil clay fractions

KW - Wheat plant residue

U2 - 10.1016/j.jhazmat.2019.03.135

DO - 10.1016/j.jhazmat.2019.03.135

M3 - Journal article

C2 - 30974227

AN - SCOPUS:85063950757

VL - 374

SP - 11

EP - 19

JO - Journal of Hazardous Materials

JF - Journal of Hazardous Materials

SN - 0304-3894

ER -

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