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This paper on Low External Input Agriculture (LEIA) has explored how indigenous hill farming systems in a developing country setting of rural Nepal are functioning and which ecological properties of such systems could contribute to the development of Low External Input and Sustainable Agriculture (LEISA). Three cases were studied using direct field observation, group discussion and interviews, and the important practices of LEIA were ranked into eight classes to analyse the ecological sustainability of the hill farming systems. The study shows that the hill farming system is complex, diverse, heavily reliant on local resources and focuses on the renewability of production resources within the farm. All this can greatly contribute to make the system ecologically sustainable. However, demands for increased production put considerable pressure on farmers to apply external inputs which, if in excess, may jeopardise the whole system. A prerequisite for guidance in careful soil management is the strengthening of supportive research aimed at teaching farmers how to use external inputs. This must agree with the principles of sustainable agriculture and take into account the site-specific variations which are characteristic of Nepalese hill farming systems. We defined the term Ecological Dynamics as 'the pattern of changes in structure and/or forces in processes which govern the development of natural and artificial ecosystems'. This definition assists in identification of trends in ecological sustainability. Understanding indigenous farming systems reveals important ecological clues essential for the development of sustainable agriculture.  相似文献   
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In the context of ongoing theoretical debate on the role of group size and heterogeneity in affecting collective action outcomes, this study analyzed associations of group size, and intra-group heterogeneities arising from ethnic, educational and livelihood-related differences with conditions of selected forests managed (formally or informally) by local user groups in the middle hills of Nepal. Four biological variables, basal area of trees, density of trees, density of saplings and richness of plant species, were chosen to represent the condition of the forests. The findings show significant differences in biological condition of the forests managed by different size forest user groups and levels of ethnic, educational and livelihood-related heterogeneities. These differences, however, are inconsistent across the dependent variables representing forest condition, indicating that they were not necessarily caused by the size of the user groups or the group heterogeneities, but could be the result of other factors, such as the history of forest land use and degradation, composition of tree species and institutional arrangements governing the forests.  相似文献   
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Techniques for water harvesting from streams for irrigation and waterpower utilities, particularly in the semi-arid middle mountain region of Nepal, were developed many centuries ago. Water harvesting techniques have traditionally evolved to fit the local environment and living conditions of the people. In terms of community participation, the sustainability of community-based local water resources management in Nepal should promote traditional streamwater harvesting technologies that will potentially benefit local communities and also should be recognized by environmentalists and water experts. This paper investigates some traditional forms of water delivery technologies adopted by local farmers in three catchment areas from the middle mountain region of Nepal. Each form of indigenous practice is considered from the objective of scientific validation.  相似文献   
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Nepal formally embarked on decentralized participatory conservation programmes in 1990. To assess who participates in and benefits from such programmes, stratified random questionnaire surveys of 234 households and interviews with 29 user group chairs were conducted in the buffer zones of two protected areas of the Nepalese Terai: Bardia National Park and Suklaphanta Wildlife Reserve. The Poisson regression shows that gender, education, household affluence, and conservation attitudes were significant predictors of people's participation in decentralized conservation programmes, while family size, ethnicity and resource dependency were not. The benefits of participation outweighed the costs based on respondents' estimates. The performance of grassroots organizations and levels of participation were correlated. Nepal's decentralized participatory conservation has achieved efficiency, relative equity and effectiveness to some extent. Yet the central government should devolve more power to local communities to sustain the achievements as well as to provide more equitable benefits to residents to ensure the effectiveness and sustainability of conservation programmes.  相似文献   
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