Long‐term zero‐tillage enhances the protection of soil carbon in tropical agriculture
| العنوان: | Long‐term zero‐tillage enhances the protection of soil carbon in tropical agriculture |
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| المؤلفون: | Sofie Sjögersten, Sacha J. Mooney, Hannah V. Cooper, R. M. Lark, Christopher H. Vane, N. T. Girkin, Juliano Carlos Calonego, Ciro Antonio Rosolem |
| المساهمون: | Univ Nottingham, Cranfield Univ, British Geol Survey, Universidade Estadual Paulista (Unesp) |
| المصدر: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| بيانات النشر: | Wiley, 2021. |
| سنة النشر: | 2021 |
| مصطلحات موضوعية: | no-till, Conventional tillage, Soil test, Soil organic matter, Rock-Eval pyrolysis, Soil Science, Soil science, Soil carbon, X-ray Computed Tomography, no‐, Tillage, Rock‐, No-till farming, Soil structure, ray computed tomography, till, Soil water, tillage, X‐, Environmental science, soil carbon, soil structure, Eval pyrolysis |
| الوصف: | Made available in DSpace on 2021-06-25T15:04:11Z (GMT). No. of bitstreams: 0 Previous issue date: 2021-05-05 Biotechnology and Biological Sciences Research Council Natural Environment Research Council through a Soils Training and Research Studentships (STARS) grant Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP) FAPEG-Goias Research Foundation FAPEMA-MaranhAo Research Foundation Contrasting tillage strategies not only affect the stability and formation of soil aggregates but also modify the concentration and thermostability of soil organic matter associated with soil aggregates. Understanding the thermostability and carbon retention ability of aggregates under different tillage systems is essential to ascertain potential terrestrial carbon storage. We characterized the concentration and thermostability of soil organic carbon (SOC) within various aggregate size classes under both zero and conventional tillage using novel Rock-Eval pyrolysis. The nature of the pore systems was visualized and quantified by X-ray computed tomography to link soil structure to organic carbon preservation and thermostability. Soil samples were collected from experimental fields in Botucatu, Brazil, which had been under zero-tillage for 2, 15 and 31 years, and from adjacent fields under conventional tillage. Soils under zero-tillage significantly increased pore connectivity whilst simultaneously decreasing interaggregate porosity, providing a potential physical mechanism for protection of SOC in the 0-20-cm soil layer. Changes in the soil physical characteristics associated with the adoption of zero-tillage resulted in improved aggregate formation compared to conventionally tilled soils, especially when implemented for at least 15 years. In addition, we identified a chemical change in composition of organic carbon to a more recalcitrant fraction following conversion to zero-tillage, suggesting aggregates were accumulating rather than mineralizing SOC. These data reveal profound effects of different tillage systems upon soil structural modification, with important implications for the potential of zero-tillage to increase carbon sequestration compared to conventional tillage. Highlights Different tillage systems may affect SOC thermostability and C retention potentials of soil aggregates. SOC thermostability was characterised by Rock-Eval pyrolysis and pore systems were quantified by X-ray CT within aggregate size classes. Profound effects of zero versus conventional tillage upon soil structural modification were observed Important implications for zero-tillage to increase C sequestration versus conventional tillage. Univ Nottingham, Div Agr & Environm Sci, Nottingham, England Cranfield Univ, Cranfield Soil & Agrifood Inst, Bedford, England British Geol Survey, Ctr Environm Geochem, Keyworth, Notts, England Sao Paulo State Univ, Dept Crop Sci, Botucatu, SP, Brazil Sao Paulo State Univ, Dept Crop Sci, Botucatu, SP, Brazil Natural Environment Research Council through a Soils Training and Research Studentships (STARS) grant: NE/M009106/1 FAPESP: 2015/50305-8 FAPEG-Goias Research Foundation: 2015-10267001479 FAPEMA-MaranhAo Research Foundation: RCUK-02771/16 Biotechnology and Biological Sciences Research Council: BB/N013201/1 |
| وصف الملف: | text |
| تدمد: | 1365-2389 1351-0754 |
| الوصول الحر: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::102a86858c01b4019678ebd2f14f4400Test https://doi.org/10.1111/ejss.13111Test |
| حقوق: | OPEN |
| رقم الانضمام: | edsair.doi.dedup.....102a86858c01b4019678ebd2f14f4400 |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 13652389 13510754 |
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