Results 51 to 60 of about 3,826 (163)
Distribution Pattern of Cadmium in the Profile of Shallow Fissure Soil and Its Influencing Factors in Karst Areas with High Geological Background [PDF]
[Objective] To study the vertical distribution pattern of cadmium (Cd) in shallow karst fissure soil, analyze the impacts of various factors on the distribution of Cd in fissures, and provide a scientific basis for future research on the distribution ...
CAI Huayin +6 more
core +1 more source
European Policy Analysis, Volume 10, Issue 3, Page 311-333, Summer 2024.Abstract Policy networks can propose solutions (policy communities, and epistemic communities), defend specific instruments (instrument constituencies), and programmatically prioritize change or stability (programmatic groups). This paper focuses on two specific networks that have been present in 30 years of administrative reform in Italy, and it ...
Giliberto Capano +3 more
wiley +1 more source
European Policy Analysis, Volume 10, Issue 3, Page 356-379, Summer 2024.Abstract While scholars have investigated how media frame human mobility and securitize irregular border crossings, little research has been dedicated to how European Union (EU) actors are portrayed in media coverage of migration across the Mediterranean. By integrating framing into narrative analysis through the Narrative Policy Framework, our article
Martina Abisso +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2006 通过田间小区试验，研究了不同油菜种植密度与施氮肥对麦茬复种饲料油菜耕层（0～20cm）土壤颗粒组成、水稳性团聚体、微团聚体、粘粒分散率和团聚度的影响。试验结果表明，麦茬复种油菜能提高耕层土壤水稳性团聚体，改善土壤颗粒组成状况；与对照（CK）相比，耕层土壤粘粒分散率呈显著或极显著性降低，〈0．001mm的土壤团聚体破坏率和特征微团聚体比例（〈0．01mm／〉0．01mm）显著降低，而土壤团聚度在油菜苗期为降低趋势，收获期呈显著或极显著性增加，〉0 ...
杨瑞吉 +3 more
doaj +2 more sources
Effects of Organic Fertilizer Substitution and Aggregation on Microfauna Communities in a Red Soil [PDF]
[Objective] Red soil is a typical soil in Southern China, and organic substitution is an important way to improve the physicochemical properties of red soil.
DING Weixin +6 more
core +1 more source
, 2017 海洋是地球上最大的碳库,发挥着全球气候变化缓冲器的作用.蓝色碳汇,简称蓝碳,即由海洋生态系统捕获的碳(主要是有机碳),是海洋储碳的重要机制之一.; 蓝碳最初认识的形式是可见的海岸带植物固碳.其实之前没有得到足够重视的、看不见的微型生物(浮游植物、细菌、古菌、病毒、原生动物)占海洋生物量90%; 以上,是蓝碳的主要贡献者.中国陆架边缘海占国土总面积的1/3,碳汇潜力巨大,亟待研发.本文以近海生态系统碳汇过程、调控机制及增汇模式为主线,论述; 了近海生态系统结构与碳循环功能特征、碳汇形成过程与机理 ...
严重玲 +16 more
core +1 more source
Advocacy strategies in state preemption: The case of energy fuel bans
Policy Studies Journal, Volume 52, Issue 2, Page 257-282, May 2024.Abstract Interest group literature suggests reformer advocacy groups, seeking policy change and innovation, are more likely to secure policy victory in local government. Entrenched advocacy groups, favoring current policies, are better suited to win policy battles at the state level.
Cory L. Struthers, Cary Ritzler
wiley +1 more source
Shuitu Baochi Xuebao, 2016 为分析南水北调(中线)丹江口库区不同土地利用方式土壤团聚体稳定性及其分形特征，揭示人类活动对土壤结构的影响，以库区内不同土地利用方式（水田、旱地、果园、人工林地、自然林地）土壤为研究对象，经干筛和湿筛法测定团聚体组成，以土壤团聚体稳定性指标（大团聚体含量（R＞0.25）和团聚体破坏率（PAD））、土壤团聚体直径指标（平均质量直径（MWD）和几何均重直径（GMD））以及分形维数（D）作为评价指标，对比分析丹江口库区不同土地利用方式下土壤团聚体组成及其稳定性。结果表明，对土壤团聚体组成的测定 ...
姜, 刘, 刘
doaj
Manifesting symbolic representation through collaborative policymaking
Policy Studies Journal, Volume 52, Issue 2, Page 283-318, May 2024.Abstract Collaboration is a widely employed strategy for addressing “wicked” policy problems. While scholars have long recognized that the organizational composition of collaborative forums can have a dramatic impact on the efficacy and equity of associated forum outputs, little is known about whether such composition impacts the manner in which ...
Jack Mewhirter +2 more
wiley +1 more source
United in disagreement: Analyzing policy networks in EU policy making
Review of Policy Research, Volume 41, Issue 1, Page 59-82, January 2024.Abstract Shared belief systems are generally assumed to forge policy networks. Empirical evidence whether and to what extend shared policy core beliefs create ally networks and under which circumstances shared policy core beliefs are not necessary to form these networks, however, is limited.
Dennis Abel, Armin Mertens
wiley +1 more source