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  Water use in global livestock production-opportunities and constraints for increasing water productivity

Heinke, J., Lannerstad, M., Gerten, D., Havlík, P., Herrero, M., Notenbaert, A. M. O., Hoff, H., Müller, C. (2020): Water use in global livestock production-opportunities and constraints for increasing water productivity. - Water Resources Research, 56, 12, e2019WR026995.
https://doi.org/10.1029/2019WR026995

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Item Permalink: https://publications.pik-potsdam.de/pubman/item/item_25060 Version Permalink: https://publications.pik-potsdam.de/pubman/item/item_25060_4
Genre: Journal Article

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 Creators:
Heinke, Jens1, Author              
Lannerstad, Mats2, Author
Gerten, Dieter1, Author              
Havlík, Petr2, Author
Herrero, Mario2, Author
Notenbaert, An Maria Omer2, Author
Hoff, Holger1, Author              
Müller, Christoph1, Author              
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1Potsdam Institute for Climate Impact Research, Potsdam, ou_persistent13              
2External Organizations, ou_persistent22              

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 Abstract: Increasing population, change in consumption habits, and climate change will likely increase the competition for freshwater resources in the future. Exploring ways to improve water productivity especially in food and livestock systems is important for tackling the future water challenge. Here we combine detailed data on feed use and livestock production with Food and Agriculture Organization of the United Nations (FAO) statistics and process‐based crop‐water model simulations to comprehensively assess water use and water productivity in the global livestock sector. We estimate that, annually, 4,387 km3 of blue and green water is used for the production of livestock feed, equaling about 41% of total agricultural water use. Livestock water productivity (LWP; protein produced per m3 of water) differs by several orders of magnitude between livestock types, regions, and production systems, indicating a large potential for improvements. For pigs and broilers, we identify large opportunities to increase LWP by increasing both feed water productivity (FWP; feed produced per m3 of water) and feed use efficiency (FUE; protein produced per kg of feed) through better crop and livestock management. Even larger opportunities to increase FUE exist for ruminants, while the overall potential to increase their FWP is low. Substantial improvements of FUE can be achieved for ruminants by supplementation with feed crops, but the lower FWP of these feed crops compared to grazed biomass limits possible overall improvements of LWP. Therefore, LWP of ruminants, unlike for pigs and poultry, does not always benefit from a trend toward intensification, as this is often accompanied by increasing crop supplementation.

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 Dates: 2020-12-112020-12-30
 Publication Status: Finally published
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1029/2019WR026995
MDB-ID: yes - 3085
PIKDOMAIN: RD2 - Climate Resilience
PIKDOMAIN: RD1 - Earth System Analysis
Organisational keyword: RD2 - Climate Resilience
Organisational keyword: RD1 - Earth System Analysis
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Title: Water Resources Research
Source Genre: Journal, SCI, Scopus, p3
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Pages: - Volume / Issue: 56 (12) Sequence Number: e2019WR026995 Start / End Page: - Identifier: CoNE: https://publications.pik-potsdam.de/cone/journals/resource/journals484
Publisher: American Geophysical Union (AGU)