期刊文献+
共找到3篇文章
< 1 >
每页显示 20 50 100
豫东平原1980-2000年农业景观生态系统格局动态 被引量:5
1
作者 田莉 丁圣彦 《河南大学学报(自然科学版)》 CAS 北大核心 2009年第1期57-62,共6页
借助地理信息系统技术,利用LUCC数据,分析了豫东平原1980-2000年农业景观格局动态变化特征及其驱动因素.结果表明,1980-2000年研究区居民点与建设用地从4 998.51 km2增加到5 212.39 km2,种植业用地为基质的农业景观相对稳定,1980年占研... 借助地理信息系统技术,利用LUCC数据,分析了豫东平原1980-2000年农业景观格局动态变化特征及其驱动因素.结果表明,1980-2000年研究区居民点与建设用地从4 998.51 km2增加到5 212.39 km2,种植业用地为基质的农业景观相对稳定,1980年占研究区土地总面积的80.07%,2000年占79.88%,其它类型用地面积均有不同程度的减少.国家土地利用政策和人口政策是该区土地利用变化的主要驱动因素.探索该区土地优化利用方式对实现农业可持续发展具有重要意义. 展开更多
关键词 时空格局 动态过程 农业景观生态系统 豫东平原
下载PDF
景观生态学在土地整理项目中的应用研究——以武汉市蔡甸区消泗等2个乡镇基本农田土地整理项目为例 被引量:2
2
作者 易兴翠 《天津农业科学》 CAS 2012年第6期55-59,共5页
我国目前以增加耕地面积、提高耕地质量为主要目标的土地整理项目传统规划设计已不能满足于生态环境保护和实现土地可持续利用的要求,运用景观生态学指导土地整理项目规划设计,调整项目区农业景观生态系统的结构,对项目区进行景观生态建... 我国目前以增加耕地面积、提高耕地质量为主要目标的土地整理项目传统规划设计已不能满足于生态环境保护和实现土地可持续利用的要求,运用景观生态学指导土地整理项目规划设计,调整项目区农业景观生态系统的结构,对项目区进行景观生态建设,提高系统的生物生产能力、生态环境服务功能和文化服务功能,对我国开展可持续性土地整理的理论研究和实践操作具有重要的参考价值。 展开更多
关键词 土地整理 农业景观生态系统 规划设计 空间格局分析
下载PDF
Moving beyond Component Research in Mountain Regions: Operationalizing Systems Integration at Farm and Landscape Scales 被引量:1
3
作者 Laura German 《Journal of Mountain Science》 SCIE CSCD 2006年第4期287-304,共18页
Most research in support of agricultural development and natural resource management in densely settled mountain ecosystems continues to emphasize component over system-level goals. Research by plant breeders, foreste... Most research in support of agricultural development and natural resource management in densely settled mountain ecosystems continues to emphasize component over system-level goals. Research by plant breeders, foresters and animal scientists is generally designed to maximize the yield of products within their particular area of expertise (edible plant parts, tree products and livestock products, respectively), while soil scientists aim largely to increase soil nutrient stocks. At landscape level the same dynamic holds within the agronomic sciences, while water engineers work independently to conserve water through its isolation from broader landscape dynamics, and other common property resources remain largely ignored. Opportunities to foster positive synergies between system components, and to integrate livelihood with conservation goals, are generally missed. This paper presents experiences of the African Highlands Initiative, an ecoregional program of the Consultative Group for International Agricultural Research (CGIAR) and a network of the Association for Strengthening Agricultural Research in Eastern and Central Africa (ASARECA), in operationalizing integrated research at farm and landscape scale. Following a discussion of the shortcomings of the conventional research paradigm that beg for strongerintegration and a review of the contributions of extant research paradigms that help us move in the right direction, the paper lays a conceptual foundation for integrated research. System components at farm and landscape level are delineated, and this somewhat arbitrary conceptual partitioning of agroecological systems shown to influence the current research paradigm as well as the partitioning of institutional mandates. Diverse meanings of systems integration are then discussed to illustrate the synergies that might be built into agricultural and natural resource research programs. The distinction between the logic of maximization and optimization is then utilized to distinguish between component and “system-level” goals. This conceptual overview is followed by several case studies to illustrate how these concepts can guide the formulation of integrated research objectives, methods and outputs at farm and landscape scale. The paper concludes with a discussion of the implications of this alternative research paradigm for the structure, function and skill base of national and international agricultural research systems. 展开更多
关键词 Integrated research AFRICA research methods HIGHLANDS
下载PDF
上一页 1 下一页 到第
使用帮助 返回顶部