江西省森林生态体系建设对策研究   总被引：1，自引：0，他引：1  

冷清波  杜天真  汪林清 《江西林业科技》2007,(4):6-10

随着产权制度改革的不断深入,江西森林生态体系建设面临的压力将越来越大。本文在充分调查和深入分析江西生态建设优劣势的基础上,按照生态经济学的一般原理,本文对森林生态体系建设的内涵、公益林区划标准、规模比例提出了自己的见解,对公益林补偿标准进行了系统的框架设计,并提出了完善森林生态体系建设的若干配套政策建议。  相似文献   

生态经济林经营模式   总被引：3，自引：4，他引：3  

何方 《经济林研究》1993,11(1):1-7

在我国丘陵山区开展以经济林为骨干项目的多种经营,是繁荣农村经济的一项战略措施。生态经济林业就是遵循自然规律和经济规律,按照生态学和生态经济学的原理,运用系统理论与系统工程的方法,组织经济林生产建设事业。它的任务是为制定经济林生产发展战略规划:为经济林栽培经营提供指导理论和方法。生态经济林的实施主要是通过区划和规划。生态经济林经营模式,有网络结构模式和立体经营模式之分。前者是一个地域生态系统的整体结构中,经济林作为一个子系统的位置,后者是具体林分结构的立体经营模式,两者是相关联的。  相似文献   

Tree planting in Tigray, Ethiopia: the importance of human disease and water microdams     

Gregory S. Amacher  Lire Ersado  William F. Hyde  Amy Osorio 《Agroforestry Systems》2004,60(3):211-225

We examine the decision to plant trees and level of tree planting for two sites, public microdam areas and household agricultural land, and two species groups in Tigray, Ethiopia. Both sites are not perfect substitutes, as they vary with respect to distance from the household and tenure security. The role of permanent pooled water irrigation microdams to tree planting is important but unknown, because water borne diseases, which may influence household income and productivity, are thought to be enhanced by the dams. We find both disease and microdams to be important predictors to tree planting. Disease seems more important in determining whether households plant at all, and less important in the level of planting for those that do plant. For example, disease increases the probability of planting both eucalyptus and other species groups on household-own land, but households suffering from malaria plant higher-cost eucalyptus trees with lower probability at both sites, while planting of other lower-cost species increases at dam sites where other villagers can monitor the trees. We also establish a connection between planting and agricultural residues, finding a strong substitution effect on own-land. Microdam access and age are also important. Households living nearer to dam sites will plant both species groups there with higher probabilities, but the decision to plant on agricultural own-land is not affected. For older dams with more developed irrigation, households are more likely to grow crops rather than plant trees on their own land, but they plant more trees at the dam sites. This revised version was published online in June 2006 with corrections to the Cover Date.  相似文献   

Refining a previous analysis of the economics of a eucalyptus/agricultural crop combination     

P. J. Maille 《Agroforestry Systems》1991,14(2):145-148

When evaluating the economics of a joint production agroforestry system two rules should be followed: (1) all benefits and costs need to be included and (2) revenue streams over time should be compared using the net present value of an infinite set of rotations. To illustrate both points, previously presented data on the economics of eucalyptus plantings around agricultural fields are reevaluated below.  相似文献   

Evolution of forest cover in Portugal: A review of the 12th–20th centuries     

Fernando Reboredo  João Pais 《林业研究》2014,25(2):249-256

Portugal's forests in the 12th century were dominated by the Fagaceae represented by Quercus and Castanea, and several pine species.From the 12th century onwards, forests underwent changes in their management starting with protection and ultimately leading to intense exploitation. The massive naval construction during the maritime expansion(mainly in the 15th–16th centuries) involved felling of approximately 5 million trees mainly Quercus suber, Pinus pinea and other Quercus species. Cumulative fuel-wood consumption of 959 Mm3 during 1300–1854 was attributed to demographic expansion while the deforestation rate during 1636–1854 accounted for a minimum of 72.6% and a maximum of 96% of total forest cover. The volume of timber used in railway sleepers from 1856 onwards might have reached 0.5 Mm3. The last quarter of the 20th century increased the forest cover of Portugal through the World Bank program of Eucalyptus globulus reforestation.  相似文献   

甘肃省经济林持续发展的经济学分析   总被引：1，自引：0，他引：1  

邢彩萍  吴春荣 《绿色科技》2014,(2):252-255

立足于区域经济学的角度,从影响区域经济活动的资源禀赋、资源配置能力、区域条件、外部环境四个方面阐述了甘肃省经济林发展的现状,以期对未来甘肃省经济林的持续发展提供参考和借鉴。  相似文献   

渔业污染的“科斯办法”及其产权安排的初步研究     

林光纪 《福建水产》2004,(4):11-15

渔业污染事故是生产发展过程中的伴生品，防止渔业污染及污染事故的妥善处理成为当前棘手的社会问题之一。“科斯办法”(Coase’s method)是现代西方经济学中处理污染事故和防止污染冲突的一个广泛被接受的理论，本文介绍“科斯定理”及其办法，分析其适用性，指出了产权安排是防止渔业污染及有效处理污染事故根本措施之一，并建议不失时期地推进以人为本、多权分离及关注公共渔业水域的产权安排。  相似文献   

Regional socio-economic importance of fisheries in Finland   总被引：1，自引：0，他引：1  

J. Virtanen  A. Ahvonen  & A. Honkanen 《Fisheries Management and Ecology》2001,8(4-5):393-403

The total value of Finnish fisheries production in 1997 was almost FIM 2 billion. The bulk of this sum was from processing and wholesaling, but in terms of value added, somewhat more than half was contributed by the primary sector, i.e. fishing and fish farming. In economic terms, fisheries accounted for 0.1% of gross domestic product (GDP) in 1997 and the relative job creation capacity was 0.15%. This paper examines the structure of Finnish fisheries in terms of production value and employment. It also considers the level of dependency on fisheries and of value added along the production chain. The focus is on concentration of the industry and on input to the economy at the regional level. The concentration of fisheries and regional dependence on fisheries are assessed in absolute and relative terms. Examining employment and value added in these two ways enables the regional nature of fisheries to be shown in greater detail. The input of fisheries to the regional economy is examined by the share of value added and by location quotients. The location quotient compares an area's share of a particular activity with that area's share of some basic or aggregated phenomenon. The location quotient showed that fisheries have importance not only in the coastal area but also inland.  相似文献   

农林经济管理专业会计学课程的教学模式创新研究     

严红梅  尹哲友 《安徽农业科学》2014,(25):8705-8706

分析了非会计专业和会计专业的教学差异,在此基础上提出了提高农林经济管理专业的会计学课程教学效果的几点建议。旨在通过改进和调整课程教学方法和策略,培养符合专业要求的专门人才,构建符合特点的教学模式。  相似文献   

农业经济与政策领域作者分布及合作研究     

尹丽春  刘永悦  刘宏宇 《黑龙江八一农垦大学学报》2014,(3):79-82,124

选取SCI/SSCI收录的国际"农业经济与政策"领域中的10个英文期刊作为研究基础数据,对作者发表论文及合作进行研究。发现作者发文量分布出现明显的"长尾现象",服从幂律分布规律,即少量作者和机构对学科领域的发展做出了大量的贡献,而大量的作者和机构只做出了少量贡献。农业经济与政策领域合作网络中包含大量不相连接的小型网络,处于科研合作网络发展的初级阶段。  相似文献