Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector

Abstract We use an attributional life cycle assessment (LCA) and simulation modelling to assess the effect of improved feeding practices and increased yields of feed crops on milk productivity and GHG emissions from the dairy sector of Tanzania’s southern highlands region. We calculated direct non-C...

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Autores principales:	James Hawkins, Gabriel Yesuf, Mink Zijlstra, George C. Schoneveld, Mariana C. Rufino
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/02fdcd9416f34579b23a5a7ff6d1953f
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spelling	oai:doaj.org-article:02fdcd9416f34579b23a5a7ff6d1953f2021-12-02T14:21:51ZFeeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector10.1038/s41598-021-83475-82045-2322https://doaj.org/article/02fdcd9416f34579b23a5a7ff6d1953f2021-02-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-83475-8https://doaj.org/toc/2045-2322Abstract We use an attributional life cycle assessment (LCA) and simulation modelling to assess the effect of improved feeding practices and increased yields of feed crops on milk productivity and GHG emissions from the dairy sector of Tanzania’s southern highlands region. We calculated direct non-CO2 emissions from dairy production and the CO2 emissions resulting from the demand for croplands and grasslands using a land footprint indicator. Baseline GHG emissions intensities ranged between 19.8 and 27.8 and 5.8–5.9 kg CO2eq kg−1 fat and protein corrected milk for the Traditional (local cattle) and Modern (improved cattle) sectors. Land use change contributed 45.8–65.8% of the total carbon footprint of dairy. Better feeding increased milk yields by up to 60.1% and reduced emissions intensities by up to 52.4 and 38.0% for the Traditional and Modern sectors, respectively. Avoided land use change was the predominant cause of reductions in GHG emissions under all the scenarios. Reducing yield gaps of concentrate feed crops lowered emissions further by 11.4–34.9% despite increasing N2O and CO2 emissions from soils management and input use. This study demonstrates that feed intensification has potential to increase LUC emissions from dairy production, but that fertilizer-dependent yield gains can offset this increase in emissions through avoided emissions from land use change.James HawkinsGabriel YesufMink ZijlstraGeorge C. SchoneveldMariana C. RufinoNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-15 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q James Hawkins Gabriel Yesuf Mink Zijlstra George C. Schoneveld Mariana C. Rufino Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector
description	Abstract We use an attributional life cycle assessment (LCA) and simulation modelling to assess the effect of improved feeding practices and increased yields of feed crops on milk productivity and GHG emissions from the dairy sector of Tanzania’s southern highlands region. We calculated direct non-CO2 emissions from dairy production and the CO2 emissions resulting from the demand for croplands and grasslands using a land footprint indicator. Baseline GHG emissions intensities ranged between 19.8 and 27.8 and 5.8–5.9 kg CO2eq kg−1 fat and protein corrected milk for the Traditional (local cattle) and Modern (improved cattle) sectors. Land use change contributed 45.8–65.8% of the total carbon footprint of dairy. Better feeding increased milk yields by up to 60.1% and reduced emissions intensities by up to 52.4 and 38.0% for the Traditional and Modern sectors, respectively. Avoided land use change was the predominant cause of reductions in GHG emissions under all the scenarios. Reducing yield gaps of concentrate feed crops lowered emissions further by 11.4–34.9% despite increasing N2O and CO2 emissions from soils management and input use. This study demonstrates that feed intensification has potential to increase LUC emissions from dairy production, but that fertilizer-dependent yield gains can offset this increase in emissions through avoided emissions from land use change.
format	article
author	James Hawkins Gabriel Yesuf Mink Zijlstra George C. Schoneveld Mariana C. Rufino
author_facet	James Hawkins Gabriel Yesuf Mink Zijlstra George C. Schoneveld Mariana C. Rufino
author_sort	James Hawkins
title	Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector
title_short	Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector
title_full	Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector
title_fullStr	Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector
title_full_unstemmed	Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector
title_sort	feeding efficiency gains can increase the greenhouse gas mitigation potential of the tanzanian dairy sector
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/02fdcd9416f34579b23a5a7ff6d1953f
work_keys_str_mv	AT jameshawkins feedingefficiencygainscanincreasethegreenhousegasmitigationpotentialofthetanzaniandairysector AT gabrielyesuf feedingefficiencygainscanincreasethegreenhousegasmitigationpotentialofthetanzaniandairysector AT minkzijlstra feedingefficiencygainscanincreasethegreenhousegasmitigationpotentialofthetanzaniandairysector AT georgecschoneveld feedingefficiencygainscanincreasethegreenhousegasmitigationpotentialofthetanzaniandairysector AT marianacrufino feedingefficiencygainscanincreasethegreenhousegasmitigationpotentialofthetanzaniandairysector
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Feeding efficiency gains can increase the greenhouse gas mitigation potential of the Tanzanian dairy sector

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