Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2019WR026995 |
Water use in global livestock production—opportunities and constraints for increasing water productivity | |
Jens Heinke; Mats Lannerstad; Dieter Gerten; Petr Havlik; Mario Herrero; An Notenbaert; Holger Hoff; Christoph Mü; ller | |
2020-11-20 | |
发表期刊 | Water Resources Research
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出版年 | 2020 |
英文摘要 | 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 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 towards intensification, as this is often accompanied by increasing crop supplementation. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/304299 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | Jens Heinke,Mats Lannerstad,Dieter Gerten,等. Water use in global livestock production—opportunities and constraints for increasing water productivity[J]. Water Resources Research,2020. |
APA | Jens Heinke.,Mats Lannerstad.,Dieter Gerten.,Petr Havlik.,Mario Herrero.,...&ller.(2020).Water use in global livestock production—opportunities and constraints for increasing water productivity.Water Resources Research. |
MLA | Jens Heinke,et al."Water use in global livestock production—opportunities and constraints for increasing water productivity".Water Resources Research (2020). |
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