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Tillage systems effects on soil carbon stock and physical fractions of soil organic matter

Author

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  • Pinheiro, Érika Flávia Machado
  • de Campos, David Vilas Boas
  • de Carvalho Balieiro, Fabiano
  • dos Anjos, Lúcia Helena Cunha
  • Pereira, Marcos Gervasio

Abstract

Changes in soil management and land use influence soil organic matter (SOM) turnover through changes in quantity and quality of plant residues entering the soil, their seasonal and spatial distribution, the ratio between above- and bellow-ground inputs and through changes in soil disturbance. We hypothesized that the sequestered C is stored mainly in the mineral associated fraction (C associated in sand, silt and clay fraction). The objective of this study was to evaluate the C stock and stabilization in a tropical Dystrophic Red Latosol (Typic Haplortox) (Paty do Alferes, Brazil) subjected to 6-years soil tillage systems and soil cover. Treatments included no-tillage (NT), animal traction (AT) and conventional tillage (CT). Two additional treatments were evaluated: grass coverage (GC) and bare soil (BS). After six years crop, soil C stock in the 0–10 cm layer was higher in NT than in CT (17.6 vs. 12.3 Mg ha−1, P < 0.05). It resulted an increase of 5.3 Mg C ha−1 in NT when comparing to CT. In NT, most of the C accumulation compared to CT occurred in the mineral associated fraction. Although, only the C associated in sand fraction was statistically different (6.7 vs. 1.2 g kg−1 soil, P < 0.05). GC had the highest C sequestration and C and N associated in the mineral fraction (14.9 g C kg−1 and 5.1 g N kg−1) in the 0–5 cm depth. For all treatments, most of the soil organic C was in the heavy fraction (> 55%). GC incorporated to soil annually 0.6 Mg C ha−1. C associated with sand fractions was the most sensible mineral associated C fraction compared to C in silt and clay fraction, and can be used as a suitable soil quality indicator for sustainable use.

Suggested Citation

  • Pinheiro, Érika Flávia Machado & de Campos, David Vilas Boas & de Carvalho Balieiro, Fabiano & dos Anjos, Lúcia Helena Cunha & Pereira, Marcos Gervasio, 2015. "Tillage systems effects on soil carbon stock and physical fractions of soil organic matter," Agricultural Systems, Elsevier, vol. 132(C), pages 35-39.
    • Handle: RePEc:eee:agisys:v:132:y:2015:i:c:p:35-39
    DOI: 10.1016/j.agsy.2014.08.008
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    Cited by:

    1. Vo, Truc T.Q. & Rajendran, Karthik & Murphy, Jerry D., 2018. "Can power to methane systems be sustainable and can they improve the carbon intensity of renewable methane when used to upgrade biogas produced from grass and slurry?," Applied Energy, Elsevier, vol. 228(C), pages 1046-1056.
    2. Yan-Jie Gu & Cheng-Long Han & Meng Kong & Kadambot H. M. Siddique & Feng-Min Li, 2022. "Film Mulching with Low Phosphorus Application Improves Soil Organic Carbon and Its Decomposability in a Semiarid Agroecosystem," Agriculture, MDPI, vol. 12(6), pages 1-17, June.
    3. Rafaella Campos & Gabrielle Ferreira Pires & Marcos Heil Costa, 2020. "Soil Carbon Sequestration in Rainfed and Irrigated Production Systems in a New Brazilian Agricultural Frontier," Agriculture, MDPI, vol. 10(5), pages 1-14, May.

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