College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China.
Policy Simulation Laboratory, Zhejiang University, Hangzhou, China.
Nat Food. 2024 Nov;5(11):939-950. doi: 10.1038/s43016-024-01067-x. Epub 2024 Oct 29.
Intensified monogastric livestock management could conserve feed inputs and mitigate some of the environmental and climate challenges associated with animal production. In this study, we used data from 166 countries to model the environmental, climate and economic impacts of pig and chicken intensification. We found that whole-chain intensification could reduce annual nitrogen and greenhouse gas emissions by 49% (4.6 Tg) and 68% (554 Tg CO-equivalent), respectively. These changes translate to 5.0 Tg lower nitrogen fertilizer input for feed production, resulting in an overall benefit of US$93 billion. Integrated crop-livestock optimization under intensive management could release 27 Mha of cropland and provide additional food for 310 million people. A judicious promotion of intensification could alleviate global pressures related to food security, environment and climate change.
集约化单胃动物养殖可以节约饲料投入，并减轻与动物生产相关的一些环境和气候挑战。在这项研究中，我们使用了来自 166 个国家的数据，对猪和鸡的集约化养殖所产生的环境、气候和经济影响进行了建模。我们发现，全链条集约化养殖可分别减少 49%（4.6 公吨）和 68%（554 公吨 CO2 当量）的年度氮和温室气体排放量。这将使饲料生产所需的氮肥投入减少 5.0 公吨，带来 930 亿美元的整体效益。集约化管理下的种养结合优化可以释放 2700 万公顷耕地，并为 3.1 亿人提供额外的食物。明智地推广集约化养殖可以缓解与食品安全、环境和气候变化相关的全球压力。
