EH Graham Centre for Agricultural Innovation, Charles Sturt University, Orange, NSW 2800, Australia.
Proc Natl Acad Sci U S A. 2013 May 21;110(21):8369-74. doi: 10.1073/pnas.1208063110. Epub 2013 May 13.
Grasslands occupy 40% of the world's land surface (excluding Antarctica and Greenland) and support diverse groups, from traditional extensive nomadic to intense livestock-production systems. Population pressures mean that many of these grasslands are in a degraded state, particularly in less-productive areas of developing countries, affecting not only productivity but also vital environmental services such as hydrology, biodiversity, and carbon cycles; livestock condition is often poor and household incomes are at or below poverty levels. The challenge is to optimize management practices that result in "win-win" outcomes for grasslands, the environment, and households. A case study is discussed from northwestern China, where it has been possible to reduce animal numbers considerably by using an energy-balance/market-based approach while improving household incomes, providing conditions within which grassland recovery is possible. This bottom-up approach was supported by informing and working with the six layers of government in China to build appropriate policies. Further policy implications are considered. Additional gains in grassland rehabilitation could be fostered through targeted environmental payment schemes. Other aspects of the livestock production system that can be modified are discussed. This work built a strategy that has implications for many other grassland areas around the world where common problems apply.
草原占世界陆地表面的 40%(不包括南极洲和格陵兰岛),支持着从传统的广泛游牧到密集的畜牧业生产系统等各种群体。人口压力意味着这些草原中的许多都处于退化状态,特别是在发展中国家生产力较低的地区,这不仅影响了生产力,还影响了水文学、生物多样性和碳循环等重要的环境服务;牲畜状况往往不佳,家庭收入处于或低于贫困水平。挑战在于优化管理实践,使草原、环境和家庭都能实现“双赢”的结果。本文从中国西北地区进行了案例研究,通过使用基于能量平衡/市场的方法,在提高家庭收入的同时,大大减少了动物数量,为草原恢复提供了条件。这种自下而上的方法得到了中国六级政府的支持,制定了相应的政策。进一步考虑了政策影响。通过有针对性的环境支付计划,可以促进草原恢复的进一步发展。还讨论了可以修改的牲畜生产系统的其他方面。这项工作制定了一项战略,对世界上许多其他存在共同问题的草原地区都有影响。