Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia
Cambodia has faced drastic agrarian changes over the last twenty years with a rapid and massive transformation of the uplands from forest into arable land. Soil quality depletion is one of the main drivers of the resulting decline in crop productivity and increasing production costs in the uplands of Battambang province. The objective of the study was to assess the early effects of conventional plough-based (20 cm) management (CT) and two conservation agriculture-based (CA) cropping systems (the use of a single—CAS vs. multiple cover crop species—CAM) on a maize monocropping system using three soil organic carbon (SOC) fractions on Mollisols in Battambang province. SOC content, permanganate oxidizable carbon (POXC) and soil CO2 basal respiration through SituResp® were recorded at a depth of 0–10 cm. Twelve sampling periods were used over the growth period of the cover crops and during the maize cycle. POXC and SituResp® were highly sensitive to management practices with, across the 12 sampling periods, higher values (p < .05) under CA than CT, with an average increase of 6% and from 20% to 23%, respectively. No difference was observed in SOC content between the practices in our sampling periods. Seasonal variations were observed in both POXC and SituResp®. POXC underwent larger fluctuations following critical weather events than SituResp®. This study showed that POXC and SituResp® were rapidly sensitive to changes in agricultural management practices. POXC and SituResp® are largely influenced by seasonality and could help clarify the impact of weather patterns on soil C dynamics.
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Subjects: | F08 - Systèmes et modes de culture, P33 - Chimie et physique du sol, agriculture de conservation, carbone organique du sol, mollisol, respiration du sol, http://aims.fao.org/aos/agrovoc/c_264f7edd, http://aims.fao.org/aos/agrovoc/c_389fe908, http://aims.fao.org/aos/agrovoc/c_ca2631da, http://aims.fao.org/aos/agrovoc/c_33553, http://aims.fao.org/aos/agrovoc/c_4073, |
Online Access: | http://agritrop.cirad.fr/605247/ http://agritrop.cirad.fr/605247/7/605247.pdf |
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dig-cirad-fr-6052472024-06-28T16:05:07Z http://agritrop.cirad.fr/605247/ http://agritrop.cirad.fr/605247/ Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia. Koun Pengly, Vernet Pierre-Antoine, Filloux Titouan, Sar Veng, Seng Vang, Srimongkol Porntip, Tantachasatid Phakphoom, Sen Reaksmey, Pheap Sambo, Tivet Florent, Thoumazeau Alexis. 2024. Soil Use and Management, 40 (1):e12922, 14 p.https://doi.org/10.1111/sum.12922 <https://doi.org/10.1111/sum.12922> Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia Koun, Pengly Vernet, Pierre-Antoine Filloux, Titouan Sar, Veng Seng, Vang Srimongkol, Porntip Tantachasatid, Phakphoom Sen, Reaksmey Pheap, Sambo Tivet, Florent Thoumazeau, Alexis eng 2024 Soil Use and Management F08 - Systèmes et modes de culture P33 - Chimie et physique du sol agriculture de conservation carbone organique du sol mollisol respiration du sol http://aims.fao.org/aos/agrovoc/c_264f7edd http://aims.fao.org/aos/agrovoc/c_389fe908 http://aims.fao.org/aos/agrovoc/c_ca2631da http://aims.fao.org/aos/agrovoc/c_33553 Cambodge http://aims.fao.org/aos/agrovoc/c_4073 Cambodia has faced drastic agrarian changes over the last twenty years with a rapid and massive transformation of the uplands from forest into arable land. Soil quality depletion is one of the main drivers of the resulting decline in crop productivity and increasing production costs in the uplands of Battambang province. The objective of the study was to assess the early effects of conventional plough-based (20 cm) management (CT) and two conservation agriculture-based (CA) cropping systems (the use of a single—CAS vs. multiple cover crop species—CAM) on a maize monocropping system using three soil organic carbon (SOC) fractions on Mollisols in Battambang province. SOC content, permanganate oxidizable carbon (POXC) and soil CO2 basal respiration through SituResp® were recorded at a depth of 0–10 cm. Twelve sampling periods were used over the growth period of the cover crops and during the maize cycle. POXC and SituResp® were highly sensitive to management practices with, across the 12 sampling periods, higher values (p < .05) under CA than CT, with an average increase of 6% and from 20% to 23%, respectively. No difference was observed in SOC content between the practices in our sampling periods. Seasonal variations were observed in both POXC and SituResp®. POXC underwent larger fluctuations following critical weather events than SituResp®. This study showed that POXC and SituResp® were rapidly sensitive to changes in agricultural management practices. POXC and SituResp® are largely influenced by seasonality and could help clarify the impact of weather patterns on soil C dynamics. article info:eu-repo/semantics/article Journal Article info:eu-repo/semantics/publishedVersion http://agritrop.cirad.fr/605247/7/605247.pdf text Cirad license info:eu-repo/semantics/restrictedAccess https://agritrop.cirad.fr/mention_legale.html https://doi.org/10.1111/sum.12922 10.1111/sum.12922 info:eu-repo/semantics/altIdentifier/doi/10.1111/sum.12922 info:eu-repo/semantics/altIdentifier/purl/https://doi.org/10.1111/sum.12922 |
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F08 - Systèmes et modes de culture P33 - Chimie et physique du sol agriculture de conservation carbone organique du sol mollisol respiration du sol http://aims.fao.org/aos/agrovoc/c_264f7edd http://aims.fao.org/aos/agrovoc/c_389fe908 http://aims.fao.org/aos/agrovoc/c_ca2631da http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_4073 F08 - Systèmes et modes de culture P33 - Chimie et physique du sol agriculture de conservation carbone organique du sol mollisol respiration du sol http://aims.fao.org/aos/agrovoc/c_264f7edd http://aims.fao.org/aos/agrovoc/c_389fe908 http://aims.fao.org/aos/agrovoc/c_ca2631da http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_4073 |
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F08 - Systèmes et modes de culture P33 - Chimie et physique du sol agriculture de conservation carbone organique du sol mollisol respiration du sol http://aims.fao.org/aos/agrovoc/c_264f7edd http://aims.fao.org/aos/agrovoc/c_389fe908 http://aims.fao.org/aos/agrovoc/c_ca2631da http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_4073 F08 - Systèmes et modes de culture P33 - Chimie et physique du sol agriculture de conservation carbone organique du sol mollisol respiration du sol http://aims.fao.org/aos/agrovoc/c_264f7edd http://aims.fao.org/aos/agrovoc/c_389fe908 http://aims.fao.org/aos/agrovoc/c_ca2631da http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_4073 Koun, Pengly Vernet, Pierre-Antoine Filloux, Titouan Sar, Veng Seng, Vang Srimongkol, Porntip Tantachasatid, Phakphoom Sen, Reaksmey Pheap, Sambo Tivet, Florent Thoumazeau, Alexis Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia |
description |
Cambodia has faced drastic agrarian changes over the last twenty years with a rapid and massive transformation of the uplands from forest into arable land. Soil quality depletion is one of the main drivers of the resulting decline in crop productivity and increasing production costs in the uplands of Battambang province. The objective of the study was to assess the early effects of conventional plough-based (20 cm) management (CT) and two conservation agriculture-based (CA) cropping systems (the use of a single—CAS vs. multiple cover crop species—CAM) on a maize monocropping system using three soil organic carbon (SOC) fractions on Mollisols in Battambang province. SOC content, permanganate oxidizable carbon (POXC) and soil CO2 basal respiration through SituResp® were recorded at a depth of 0–10 cm. Twelve sampling periods were used over the growth period of the cover crops and during the maize cycle. POXC and SituResp® were highly sensitive to management practices with, across the 12 sampling periods, higher values (p < .05) under CA than CT, with an average increase of 6% and from 20% to 23%, respectively. No difference was observed in SOC content between the practices in our sampling periods. Seasonal variations were observed in both POXC and SituResp®. POXC underwent larger fluctuations following critical weather events than SituResp®. This study showed that POXC and SituResp® were rapidly sensitive to changes in agricultural management practices. POXC and SituResp® are largely influenced by seasonality and could help clarify the impact of weather patterns on soil C dynamics. |
format |
article |
topic_facet |
F08 - Systèmes et modes de culture P33 - Chimie et physique du sol agriculture de conservation carbone organique du sol mollisol respiration du sol http://aims.fao.org/aos/agrovoc/c_264f7edd http://aims.fao.org/aos/agrovoc/c_389fe908 http://aims.fao.org/aos/agrovoc/c_ca2631da http://aims.fao.org/aos/agrovoc/c_33553 http://aims.fao.org/aos/agrovoc/c_4073 |
author |
Koun, Pengly Vernet, Pierre-Antoine Filloux, Titouan Sar, Veng Seng, Vang Srimongkol, Porntip Tantachasatid, Phakphoom Sen, Reaksmey Pheap, Sambo Tivet, Florent Thoumazeau, Alexis |
author_facet |
Koun, Pengly Vernet, Pierre-Antoine Filloux, Titouan Sar, Veng Seng, Vang Srimongkol, Porntip Tantachasatid, Phakphoom Sen, Reaksmey Pheap, Sambo Tivet, Florent Thoumazeau, Alexis |
author_sort |
Koun, Pengly |
title |
Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia |
title_short |
Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia |
title_full |
Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia |
title_fullStr |
Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia |
title_full_unstemmed |
Early effects of conservation agriculture on soil organic carbon dynamics of Mollisols in Cambodia |
title_sort |
early effects of conservation agriculture on soil organic carbon dynamics of mollisols in cambodia |
url |
http://agritrop.cirad.fr/605247/ http://agritrop.cirad.fr/605247/7/605247.pdf |
work_keys_str_mv |
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_version_ |
1806037028560699392 |