Results 31 to 40 of about 2,114 (164)
Comprehensive Geochemical Evaluation and Influencing Factors of Topsoil Nutrients in a Farming Area of Dabie Mountain in Western Anhui, China [PDF]
Western Anhui is an important precision agricultural area in China, characterized by diverse landforms and multiple soil types. To determine the spatial distribution of soil nutrient elements and their controlling factors, we analyzed 5 nutrient ...
Chao SONG +5 more
core +1 more source
Abstract As the global protected area (PA) network expands to meet international targets, it is important to assess whether traditional reliance on public land will suffice for projected PA growth or whether other tenures, such as Indigenous or pastoral lands, may increasingly contribute.
Emmeline Norris +2 more
wiley +1 more source
通过实测对比分析了太行山区不同土地利用方式下土壤有机碳贮量的变化。研究结果表明:(1)不同土地利用方式下,土壤有机碳含量有明显差异,总的趋势是经济林(板栗林)〉水土保持林〉农田;(2)各种土地利用方式下,土壤有机碳和有机碳密度均随土壤深度增加呈现递减的趋势,但土地利用方式不同,其减少程度不同,农田土壤有机碳含量在土层深度上变化较小;(3)研究区域土壤总碳贮量为41573.67t,土壤碳贮量以经济林(板栗林)最大,达到了46.02%,水土保持林次之,而农田贡献最小,仅占5.43%。分析表明 ...
王海稳 +4 more
doaj
Abstract Henry George advocated for capturing land value increases for public ends. The active approach of public authorities organizing and financing land development can help capture higher land value increases, as Hartman and Spit indicate. However, this approach hardly happens in developing countries, where the coalition of private developers and ...
Nannan Xu
wiley +1 more source
生态安全是土地资源持续利用的核心和基础,对土地资源持续利用的生态安全概念和内涵进行了探讨,构建了土地持续利用的生态安全研究内容和体系,介绍了土地持续利用的生态安全评价方法,从土地利用方式的改变、土地生态安全预警、土地生态安全维护与管理、土地生态恢复和重建等方面提出了区域土地资源持续利用的生态安全体系构建。
曹新向 郭志永 雒海潮
doaj +2 more sources
通过野外采样和室内分析相结合的方法,研究了紫色丘陵区不同土地利用方式下的土壤剖面微团聚体组成及分形特征。结果表明:林地、花椒地、旱地、水田和柑橘园土壤微团聚体组成以0.25~0.05 mm粒级为优势粒级,0.05~0.01 mm次之,占18.80%~35.57%,<0.001 mm粒级含量最少,为0.33%~2.57%;0—20 cm土层土壤微团聚体年均重量比表面积(MWSSA)表现为林地(161.04 cm2/g)>柑橘园(134.49 cm2/g)>花椒地(117.31 cm2/g)>水田(100 ...
代文才 +4 more
doaj
The soil fungicide reduces the occurrence of pathogenic fungi in invaded soil and at the same time promotes the recruitment of mycorrhizal fungi and saprophytic fungi by the plants. The addition of biochar to the invaded soil has a negative legacy effect on subsequent invasive plants, while it exerts a positive enhancement effect on native plants ...
Weitao Li +5 more
wiley +1 more source
Abstract Large old trees are important ecological entities in human settlements, providing cultural values and ecological services that are threatened by current and future changes in global climate, land use and disturbance regimes. Some studies suggest incorporating social and cultural significance into the conservation of large old trees.
Zhuo Cheng +5 more
wiley +1 more source
通过野外调查与室内试验相结合的方法,对比分析不同土地利用方式土壤抗剪强度及其影响因子的关系,以期为研究区域不同土地利用方式水土流失评价提供一定科学依据。选取针阔混交林、灌木林、园地、坡耕地、荒地5种土地利用方式,观测土壤抗剪强度指标、容重、含水率、干密度、总孔隙度、土壤团聚体MWD值、粉/黏粒值,运用灰色关联法分析影响土壤抗剪强度的因素。结果表明:同一种土地利用方式土壤的黏聚力从坡上到坡下逐渐减小;不同土地利用方式土壤抗剪强度大小顺序为:坡耕地>园地>针阔混交林>荒地>灌木林 ...
李 想, 王 瑄, 盛世博, 陈志强
doaj
Testing GLEAMS for Nitrate Leaching Modeling in an Agricultural Catchment of Southeast China [PDF]
利用我国东南亚热带地区农业小流域不同土地利用方式的硝氮渗漏淋失实测数据检验了GLEAMS(Groundwater Loading Effects of Agricultural Management Systems)模型在该地区的适用性。通过现场试验和实地调查并结合模型手册,获取模型所需的水文和营养盐参数,参考模型参数的敏感性分析结果对模型进行调试。结果表明模型对水稻田除外的其它土地利用方式的硝氮渗漏淋失模拟效果较好。水稻田渗漏模拟效果差的主要原因在于模型的水分平衡方程不能反应水稻田长期淹水的实际情况 ...
徐玉裕 +3 more
core

