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草原环境恶化及对策的经济学分析 被引量:9
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作者 李仲广 吕振艳 高擎 《内蒙古农业大学学报(社会科学版)》 2001年第2期17-20,共4页
本文从经济学的角度对草原环境恶化及其对策进行分析。首先给出草原资源的生物学模型 ,通过放牧活动的“成本 -收益”分析 ,对过度放牧进行了数量界定 ,指出最大可持续放牧量并不是政府最优管理目标 ;其次 ,进一步分析了过度放牧与环境... 本文从经济学的角度对草原环境恶化及其对策进行分析。首先给出草原资源的生物学模型 ,通过放牧活动的“成本 -收益”分析 ,对过度放牧进行了数量界定 ,指出最大可持续放牧量并不是政府最优管理目标 ;其次 ,进一步分析了过度放牧与环境恶化的经济学原因 ;在此基础上 ,对我国草原资源管理提出可供操作的政策建议。 展开更多
关键词 最大可持续放牧 有效可持续放牧 过度放牧 可交易配额
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用卫星充当空中牧羊人
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作者 小木 《太空探索》 2003年第9期9-9,共1页
关键词 卫星 爱尔兰 可持续放牧 土壤侵蚀 畜牧业
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Sustainability of Transhumance Grazing Systems under Socio-economic Threats in Langtang,Nepal 被引量:1
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作者 Suman ARYAL Tek Narayan MARASENI Geoff COCKFIELD 《Journal of Mountain Science》 SCIE CSCD 2014年第4期1023-1034,共12页
The decline or loss of traditional social- ecological systems may induce adverse effects to the societies and ecosystems. Transhumance, the recurring and seasonal movement of grazing livestock, is increasingly constra... The decline or loss of traditional social- ecological systems may induce adverse effects to the societies and ecosystems. Transhumance, the recurring and seasonal movement of grazing livestock, is increasingly constrained by a numbers of factors including policy, land use and soeio-economic changes in Nepal. To explore how these changes have affected the transhumance, this study investigated transhumance at the Langtang valley in central Nepal. The specific objectives of this study were to determine the herd size and composition, spatial-temporal patterns and to identify the major drivers of the system and the system changes. Data were collected from field study comprising semi-structured interviews with the herders, focus group discussions, key informants survey, and observations of rangeland and livestock management systems. The study revealed that the transhumanee system in the Langtang is influenced by two types of drivers. In one hand, traditional practices are contributing to the sustainability of the system. On the other hand, the grazing patterns and adaptive responses are strongly influenced by changes in government policies, socioeconomic and cultural transformation, livestock productivity, markets, rangeland conditions and climate change. The findings of this study help with the development and implementation of transhumance management policy for the sustainability. 展开更多
关键词 Chauri DRIVERS Langtang Nepal TRANSHUMANCE
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