共查询到19条相似文献,搜索用时 78 毫秒
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国内生态恢复研究进展 总被引:9,自引:1,他引:9
本文介绍了生态恢复的研究进展,从生态恢复的定义、退化生态系统的指标等方面进行阐述,重点对国内在恢复生态学方面的进展做了介绍。对当前的人工草地、草地农业的研究情况做了一些概述。 相似文献
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生态环境治理,是我国提出的旨在保护和建设好生态环境,实现可持续发展的战略决策。退化草地修复和矿山生态恢复是我国生态环境治理重要的任务之一。而当前草地退化严重区的治理难点主要集中在种子萌发和幼苗生长两个阶段。种子丸粒化作为一种种子管理技术,在促进种子萌发、增强出苗率和提高播种能力等方面具有重要作用。通过丸粒化机将种子与丸粒化配方粉剂相结合,制成不同倍数的丸粒化种子,以改善土壤与种子的接触面和生存环境,为生态恢复提供充分的基础保障。前期通过查阅大量有关种子丸粒化相关文献和专利等资料,本研究综述了可被使用在退化高寒草地治理、高寒矿区修复,以及退牧还草等生态恢复领域的种子丸粒化材料,包括填料、黏合剂和活性成分等。以期为我国生态修复工程提供科学理论依据,进而为种子和草种业的高质量发展提供一种新路径。 相似文献
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南非草原生态恢复与"三化"草地治理培训团 《四川畜牧兽医》2004,31(7):58-59
2003年11月,为学习和借鉴草原生态恢复与“三化”草地治理以及发展畜牧业的先进技术和管理经验,由四川省畜牧食品局和四川省外专局联合组织的草地生态恢复和“三化”草地治理培训团一行14人,在南非比勒陀尼亚、约翰内斯堡、开普顿等地,就草地生态、人工种草、土壤肥料、牧草与饲料的生产和贮藏,放牧与农牧场管理、矿碴治 相似文献
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退化草地植被生态恢复系统工程设计 总被引:2,自引:0,他引:2
设计了生态环境适宜度分析及植被生态恢复系统工程决策专家系统的技术流程。应用多种数据源、多种决策分析方法,建立生态环境基础空间数据库,确定生态环境适宜度评价模型,依据专家系统原理,在地理信息系统平台上分析生态环境适宜度,决策生成植被恢复的布局方案和优化栽培技术组合。 相似文献
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中国草地生态系统碳循环研究进展 总被引:5,自引:2,他引:5
草地生态系统碳循环研究在揭示草地碳源/汇功能,提高草地碳管理水平上至关重要。阐述了碳科学的重要意义;对我国草地生态系统碳储量及碳排放量评估结果予以总结比较;探讨工程建设、草原开垦、放牧管理、施肥、草地恢复技术和气候变化及其他自然因素对草地生态系统碳循环的影响;概括并评价目前我国草地生态系统碳评估的研究方法及意义。指出目前我国草地生态系统碳循环研究中存在的主要问题,及未来中国草地生态系统碳循环的研究趋势。 相似文献
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草地是我国陆地面积最大的生态系统类型,对维持我国自然生态系统格局、功能和过程具有特殊的生态意义。目前,草地退化导致的区域生态问题越来越突出,评价我国草地资源生态服务功能的经济价值,尤其是其潜在的生态调节功能和生命支持功能的价值,对于制定合理的区域生态保护和经济开发决策、保护和恢复草地生态系统具有重要意义。本文在阐明草地生态系统服务功能内涵基础上,再叙述2003年即千年生态系统框架提出以来我国草地生态系统服务功能价值研究现状,并对研究中存在的问题和发展方向进行总结,旨在为区域及全国尺度开展草地生态系统服务功能评价研究奠定基础。 相似文献
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草地是我国陆地面积最大的生态系统类型,对维持我国自然生态系统格局、功能和过程具有特殊的生态意义。目前,草地退化导致的区域生态问题越来越突出,评价我国草地资源生态服务功能的经济价值,尤其是其潜在的生态调节功能和生命支持功能的价值,对于制定合理的区域生态保护和经济开发决策、保护和恢复草地生态系统具有重要意义。本文在阐明草地生态系统服务功能内涵基础上,再叙述2003年即千年生态系统框架提出以来我国草地生态系统服务功能价值研究现状,并对研究中存在的问题和发展方向进行总结,旨在为区域及全国尺度开展草地生态系统服务功能评价研究奠定基础。 相似文献
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草地生态系统氮循环研究进展 总被引:1,自引:0,他引:1
综合国内外研究现状,对草地生态系统N循环过程、N素添加、N的环境影响因素、盐渍化与N相关性的研究现状及进展进行了综述,并对存在的问题和前景进行了分析和展望,旨在充分发挥草地生产潜力、探索其适应性管理措施,为寻求效果最佳、成本最低、耗时最短的盐碱地改良方法提供理论依据。 相似文献
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《Strength and Conditioning Journal》2014,67(5):584-598
The Sagebrush Steppe Treatment Evaluation Project (SageSTEP) is an integrated long-term study that evaluates ecological effects of alternative treatments designed to reduce woody fuels and to stimulate the herbaceous understory of sagebrush steppe communities of the Intermountain West. This synopsis summarizes results through 3 yr posttreatment. Woody vegetation reduction by prescribed fire, mechanical treatments, or herbicides initiated a cascade of effects, beginning with increased availability of nitrogen and soil water, followed by increased growth of herbaceous vegetation. Response of butterflies and magnitudes of runoff and erosion closely followed herbaceous vegetation recovery. Effects on shrubs, biological soil crust, tree cover, surface woody fuel loads, and sagebrush-obligate bird communities will take longer to be fully expressed. In the short term, cool wet sites were more resilient than warm dry sites, and resistance was mostly dependent on pretreatment herbaceous cover. At least 10 yr of posttreatment time will likely be necessary to determine outcomes for most sites. Mechanical treatments did not serve as surrogates for prescribed fire in how each influenced the fuel bed, the soil, erosion, and sage-obligate bird communities. Woody vegetation reduction by any means resulted in increased availability of soil water, higher herbaceous cover, and greater butterfly numbers. We identified several trade-offs (desirable outcomes for some variables, undesirable for others), involving most components of the study system. Trade-offs are inevitable when managing complex natural systems, and they underline the importance of asking questions about the whole system when developing management objectives. Substantial spatial and temporal heterogeneity in sagebrush steppe ecosystems emphasizes the point that there will rarely be a “recipe” for choosing management actions on any specific area. Use of a consistent evaluation process linked to monitoring may be the best chance managers have for arresting woodland expansion and cheatgrass invasion that may accelerate in a future warming climate. 相似文献
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《Strength and Conditioning Journal》2020,73(3):441-451
Degradation of alpine meadows on the Qinghai-Tibetan Plateau is an important issue for ecological science, policy making, and the welfare of local herders. Destruction of alpine meadows results from degeneration of vegetation and soil systems and from the mechanical decoupling of the environment, grassland, livestock, and herders and, subsequently, discordance among these subsystems. In this study, systematic integration of restoration techniques based on the grassland agroecosystems coupling theory was developed for the management and restoration of degraded alpine meadows. To test the effectiveness of these integrated restoration techniques, we conducted restoration trials that included grazing management, enclosed, fertilization, overseeding, and sward ripping by evaluating the ecosystem coupling of soil, plant and livestock, and ecosystem functions. The results of this study suggest that comprehensive restoration practices include grazing and agronomy techniques (fertilizer, overseeding, and sward ripping) that result in the greatest level of ecosystem coupling, while the single restoration practice leads to poorly coupled ecosystems. Restoration practice changes in ecosystem functionality are positively related to changes in ecosystem coupling. Our results highlight the importance of diversified restoration practices for facilitating ecological coupling and functioning in the degraded alpine meadow. The restorative scheme also bridges the gap between restoration theory and practice by providing guidelines for herders and policy makers for the urgent task of restoring degraded alpine meadows. 相似文献