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Geochronology and Geochemistry of Felsite Dike from Shanmen Silver Deposit in Central Jilin Province, China, and Its Geological Significance 吉林中部山门银矿Felsite脉的年代学、地球化学特征及其地质意义
Pub Date : 1900-01-01 DOI: 10.11648/j.jenr.20221102.13
Cremilda Samuel Jofrisse, P. Yao, C. Sheli
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引用次数: 0
Potential of Agroforestry in Sustainable Fuelwood Supply in Kenya 农林业在肯尼亚可持续薪材供应中的潜力
Pub Date : 1900-01-01 DOI: 10.11648/j.jenr.20221101.11
Benjamin Mutuku Kinyili
: Sub Saharan African (SSA) region rely heavily on fuelwood for their energy needs and will potentially increase in the foreseeable future due to increased population growth in the region. The continued utilization of fuelwood in the region subject to inefficient technology of energy conversion is projected to put more increasing pressure on forest cover and resources. The decline in forest resources is a precursor to exploration of other resources that may provide energy to human, in which agroforestry comes in mind. Therefore, the aim of this discussion paper was to review the status of fuelwood consumption patterns in Kenya, while highlighting the status and sustainability of fuelwood sector in the country. One of the approaches to deal with fuelwood problem is to enhance adoption of agroforestry, with an aim of reducing the harvest of wood and non-wood products in forests through sustainable planting of trees in the farms. However, the main constraints identified in adopting agroforestry for sustainable forest management were: Lack of suitable laws, legislation and policy framework, unavailability of planting material, inadequacy of research and extension services, long gestation time, access to credit, and finally land tenure and security. In order to expand the adoption of agroforestry for sustainable forest resource use, there is a need for logical approach aimed in promoting a multi-purpose agroforestry system under local farming systems where there is still large land capable of sustaining the practice.
撒哈拉以南非洲(SSA)地区严重依赖薪材满足其能源需求,由于该地区人口增长,在可预见的未来,这一需求可能会增加。由于能源转换技术效率低下,预计该区域继续利用薪材将对森林覆盖和资源造成越来越大的压力。森林资源的减少是探索其他可为人类提供能源的资源的前兆,这就想到了农林业。因此,本讨论文件的目的是审查肯尼亚薪材消费模式的现况,同时强调该国薪材部门的现况和可持续性。处理薪材问题的办法之一是加强采用农林业,目的是通过在农场可持续种植树木来减少森林中木材和非木材产品的采伐。然而,在采用农林业进行可持续森林管理方面所查明的主要制约因素是:缺乏适当的法律、立法和政策框架,无法获得种植材料,研究和推广服务不足,酝酿时间长,获得信贷的机会,最后是土地保有权和保障。为了扩大采用农林业促进可持续森林资源的利用,需要采取合乎逻辑的办法,在仍然有大片土地能够维持这种做法的地方农业制度下促进多用途农林业系统。
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引用次数: 3
Renewable Energy and Its Implications in the African Context 可再生能源及其对非洲环境的影响
Pub Date : 1900-01-01 DOI: 10.11648/j.jenr.20221101.12
Y. Haile
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引用次数: 0
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Journal of Energy and Natural Resources
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