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Potential and constraints for applying the "4 per 1000 Initiative" in the Caribbean: the case of Guadeloupe

Chopin, Pierre and Sierra, Jorge (2021). Potential and constraints for applying the "4 per 1000 Initiative" in the Caribbean: the case of Guadeloupe. Regional Environmental Change. 21 , 13
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Abstract

This paper assesses the feasibility of the 4 per 1000 initiative for agricultural soils in the tropics more specifically in Guadeloupe, as a representative case study of the Caribbean and other tropical regions. We used a locally adapted and calibrated model describing soil organic carbon dynamics under the impact of climate change and a broad range of scenarios combining increased use of organic amendments, reduced soil tillage, and increased land area for the local market. We found that, in its current state, only 26% of agricultural area could achieve a 4 parts per thousand year(-1) increase in soil organic carbon (SOC) stocks in the coming 30 years, due mainly to perennial cropping systems (sugarcane, banana, orchards) occupying soils with the lowest SOC stocks. Implementing reduced tillage with increased use of locally produced composts would increase the agricultural area reaching the 4 per 1000 target to 31%. However, at territory scale, all scenarios tested showed an annual decrease in SOC stocks varying from - 0.1 to - 3.2 parts per thousand. The limited area on which the 4 per 1000 target is feasible and generalized SOC losses were mainly linked to the current high SOC stocks in volcanic and calcareous soils on the island and lack of practices capable of further increasing C inputs in current cropping systems. We concluded that C sequestration potential in the Caribbean is rather limited and that increasing SOC stocks, even lower than 4 per 1000, should be the primary target in adaptation to climate change, by increasing the resilience of cropping systems based mainly on SOC-poor soils.

Authors/Creators:Chopin, Pierre and Sierra, Jorge
Title:Potential and constraints for applying the "4 per 1000 Initiative" in the Caribbean: the case of Guadeloupe
Series Name/Journal:Regional Environmental Change
Year of publishing :2021
Volume:21
Article number:13
Number of Pages:10
Publisher:SPRINGER HEIDELBERG
ISSN:1436-3798
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 405 Other Agricultural Sciences > Environmental Sciences related to Agriculture and Land-use
Keywords:Climate change mitigation, Compost use, Cropping system, C sequestration, Land use change, Reduced tillage
URN:NBN:urn:nbn:se:slu:epsilon-p-110665
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-110665
Additional ID:
Type of IDID
DOI10.1007/s10113-020-01740-4
Web of Science (WoS)000610525100001
ID Code:22435
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Dept. of Crop Production Ecology
Deposited By: SLUpub Connector
Deposited On:19 Feb 2021 13:03
Metadata Last Modified:19 Feb 2021 13:11

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