Results 21 to 30 of about 1,611 (156)
Gradient distributions of nitrogen and organic carbon in the soils from inland to tidal flat in the Yellow River Delta [PDF]
, 2014 黄河三角洲是我国典型的通过黄河冲积泥沙填海造陆形成的近代沉积区。区域受到黄河冲积、沉积等自然过程和农业耕种熟化等人类活动的双重影响。本研究通过在黄河三角洲地区内陆到河口海湾不同距离采集典型土壤类型剖面发生层样品，探讨土壤有机碳、总氮等生源要素的空间分布规律，为阐明我国典型海岸带地区陆源碳、氮的输送及循环特征提供基础依据。研究结果表明，黄河三角洲内陆与河口地区呈现出完全不同的土壤碳、氮分布规律。表层土壤碳、氮含量在黄河沿岸及三角洲南部均表现出由陆向海逐级递减的空间分布特征 ...
李远 +4 more
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Integrative Conservation, Volume 4, Issue 4, Page 686-694, December 2025.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
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The Spatial Analysis of Betel Nut Plantation Hot Spots in the Upper Shui-Li Creek Watershed [PDF]
, 2014 This study investigated the spatial distribution of BNP hot spots in the upper Shui-Li Creek watershed. Two spatial autocorrelation methods, Moran’s I and G statistics, were selected for analyzing the spatial cluster of BNPs with different grid sizes ...
Chun-Kuo Yeh +5 more
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People and Nature, Volume 7, Issue 11, Page 2700-2713, November 2025.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
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Shuitu Baochi Xuebao, 2023 东北黑土带是我国重要的商品粮生产基地,土壤质量退化、水土流失等问题直接影响生态与粮食供给安全,为明晰东北黑土带土地利用变化特征及评价生态敏感性,以2000年、2005年、2010年、2015年、2020年东北黑土带5期土地利用数据为基础,采用转移矩阵、地理探测器、综合生态风险评价等方法,研究景观格局及生态风险变化趋势。结果表明:(1)2000-2020年,研究区未利用地面积增加1 035.7km2,水域面积减少975.8 km2,土地利用变化最明显,耕地是阶段性变化较为剧烈的土地利用方式;(2 ...
晋一然 +4 more
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World Water Policy, Volume 11, Issue 4, Page 1048-1064, November 2025.ABSTRACT Groundwater governance is complex due to several externalities associated with groundwater being an invisible natural resource tied to the land with millions of extractors and limited means of exclusion. The paper traces the evolution of groundwater irrigation in India and the corresponding change in groundwater laws and policies to address ...
Anindita Sarkar, Amrita Sarkar
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Field studies in Soil Nitrogen Mineralization in an Agriculture Catchment, South Fujian Province [PDF]
, 2007 人类活动对地球系统的影响迅速扩大，大量氮肥的输入使得生态系统氮超载，土壤氮矿化作为土壤氮转化的一个内部过程，在氮循环过程中起着非常重要的作用。农民在施肥期间往往忽略了土壤氮矿化这部分氮输入，盲目的追加化肥，导致氮元素的大量流失，引发一系列的生态环境问题。因此系统分析农田不同土地利用方式下土壤氮矿化负荷，并在此基础上对五川流域氮的收支进行试验研究，对指导农民具体施肥，提高氮的利用率，减少氮流失，降低环境中过量氮存在的风险具有重要的理论和实践意义。 本文以南靖县五川流域为例，以环境科学、农业生态学、农艺学 ...
李大朋
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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
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Functional Ecology, Volume 39, Issue 10, Page 2889-2904, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract In the Southwest Australian Biodiversity Hotspot, the greatest plant species diversity tends to occur on the most phosphorus (P)‐impoverished soils. Many plant species in this P‐impoverished environment release root carboxylates that mobilise soil P which is a more ...
Xue Meng Zhou +5 more
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基于GIS的土地利用类型与山地灾害敏感性分析--以云南省昆明市东川区为例
Shuitu Baochi Xuebao, 2004 人类不合理的土地利用方式对山地灾害具有明显的促进作用,但与此相关的定量研究成果则较少报道。以云南省昆明市东川区为例,在RS和GIS技术支持下,探讨了山地灾害敏感性系数(SC)的计算方法,定量分析了不同坡地土地利用方式对泥石流和滑坡、崩塌的综合敏感系数。发现区内对山地灾害最敏感的土地利用方式为工矿用地、道路建设用地、>35°的未利用裸地、>25°的低覆盖草地、8°～15°和25°～35°的灌丛地以及>25°的旱地;最不敏感的土地利用方式是水库常年蓄水位以下的土地、河滩地、密林地。根据综合敏感系数大小 ...
何易平 马泽忠 谢洪 崔鹏 王兆印
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