Results 51 to 60 of about 1,692 (156)
Shuitu Baochi Xuebao, 2016 研究了次降雨过程中北京市不同土地利用方式下（草地、农田、林地和果园）土壤养分流失特征。结果表明：（1）在不同土地利用方式下，地表径流量的变化均随着降雨时间的增加呈对数变化趋势，在同一降雨时间内，地表径流量均表现为草地＞农田＞林地＞果园。（2）草地泥沙流失量随降雨历时幅度较大，在降雨后期出现陡增陡降的变化趋势，其他3种土地利用方式下泥沙流失量的增加幅度较小；不同土地利用方式下泥沙流失量大小顺序为：草地＞农田＞林地＞果园。（3）草地和农田地表径流量显著高于林地和果园（P＜0.05 ...
史佳良, 王秀茹, 李淑芳, 李 宁
doaj
Impacts of storm event on DOM composition and flux in two Jiulong Tributaries with different watershed features [PDF]
, 2016 通过调查2014年7月"麦德姆"台风影响期间福建九龙江北溪(流域以林地为主)和西溪(农业流域和城市背景)下游定点站DOM的时间序列,测定样品的DOC含量及其吸收光谱和三维荧光光谱,以评估不同流域背景对河流DOM动力学降雨响应的差异性,并为流域-河口系统的一体化管理提供重要参考。降雨期间,两条河流DOC浓度、吸收系数aCDOM(350)以及总荧光强度均随径流量升高而增大,并在水位下降期持续增加,且西溪增加量明显高于北溪,说明受人类活动扰动大的流域河流有机质对暴雨事件的响应更为灵敏 ...
徐静 +5 more
core
China's Eco‐Civilisation, Climate Leviathan, and Hobbesian Energy Transition
Antipode, Volume 57, Issue 3, Page 830-861, May 2025.Abstract Scholars have hitherto tended to theorise China's ecological civilisation project either as a form of environmental authoritarianism or as a vision of eco‐socialism. This paper contributes to the conversation by conducting a textual analysis of Chinese scholarly discussions on eco‐civilisation.
David Chen
wiley +1 more source
Shuitu Baochi Xuebao, 2011 采用野外调查与试验分析相结合的方法,对大庆市五区四县不同利用方式土壤全盐量、阴离子组成、pH值、总碱度、交换性Na+和碱化度等指标进行了研究,并运用主成分分析对不同利用方式土壤的盐碱化进行综合评价.结果表明:全盐量和阴离子在不同土地利用方式中排序基本一致为,未利用地＞草地＞工业用地＞水田＞旱田,且阴离子含量随全盐量的增加而增加.土壤碱化度含量差异较大,且与交换性Na+呈显著正相关.土壤pH值和总碱度的变化趋势一致,即土壤总碱度愈大,pH值愈大,但不呈现比例关系.pH值与交换性Na+、CO23-和HCO3-
张杰 +4 more
doaj
Functional Ecology, Volume 39, Issue 2, Page 621-634, February 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Tropical forests are generally characterized by high species diversity and low soil phosphorus (P) availability. Although tropical plants have evolved adaptations to low soil P availability, we know relatively little about the strategies of different groups of species ...
Yingxu Fan +11 more
wiley +1 more source
A spatially explicit assessment of factors shaping attitudes toward African elephant conservation
Conservation Biology, Volume 39, Issue 1, February 2025.Abstract Conservation plans that explicitly account for the social landscape where people and wildlife co‐occur can yield more effective and equitable conservation practices and outcomes. Yet, social data remain underutilized, often because social data are treated as aspatial or are analyzed with approaches that do not quantify uncertainty or address ...
Sarah L. Carroll +9 more
wiley +1 more source
Study on soil denitrification in an agricultural catchment in southeasten area of Fujian province [PDF]
, 2007 反硝化是一个重要的生物化学过程，是氮生物地球化学循环的重要环节。在维持流域、乃至全球氮素平衡方面发挥着重要作用。土壤反硝化的中间产物之一的N2O气体，是一种温室气体，对大气臭氧层具有较大的破坏作用。另外，反硝化还影响其他重要的生物地球化学过程。因此，反硝化研究具有重要的现实意义。 随着经济的高速发展、自然资源的不断消耗和生态环境的不断恶化，全球环境问题日益突出，温室效应已十分明显。作为温室气体之一的N2O对全球气候变化有着重要的影响。目前，有关N2O的研究已成为温室效应与全球气候变化研究的焦点之一 ...
徐玉裕
core
International Journal of Applied Linguistics, Volume 35, Issue 1, Page 168-192, February 2025.Abstract Despite the abundance of pedagogical reforms conducted in task‐based language teaching (TBLT), few studies have fully explored the adaptation of TBLT to cater to the specific language learning requirements and cultural contexts of local communities.
Jinmiao Lu, Qing Ma, Shaofeng Li
wiley +1 more source
Analysis of Soil Erosion Intensity Change Trajectories and Their Driving Factors in Yunnan Province Based on An Improved Stability Mapping Method [PDF]
[Objective] To elucidate the change trajectories of soil erosion intensity in Yunnan Province from 1990 to 2022, and analyze the types of changes and their driving factors, in order to provide a scientific foundation for effective soil erosion control ...
HUANG Bangmei +4 more
core +1 more source
Shuitu Baochi Xuebao, 2006 通过实地调查、土壤采样分析和数理统计结合的方法，对川中丘陵区5种土地利用方式（水田、旱地、菜地、林地和荒草地）的土壤养分状况进行对比分析，结果表明．土地利用方式对土壤有机质、全氮、全钾、全磷、碱解氮、速效钾和速效磷含量的影响达极显著（或显著）水平；在5种土地利用方式中．土壤有机质和全氮含量由高到低的顺序为：水田〉林地〉菜地〉旱地〉荒草地；土壤全钾和速效钾含量由高到低的顺序为：水田〉菜地〉旱地〉林地〉荒草地；土壤全磷含量由高到低的顺序为：菜地〉旱地〉林地〉水田〉荒草地。
胡玉福 +4 more
doaj +2 more sources