Shuitu Baochi Xuebao, 2019 土壤结构是土壤功能的基础，不仅影响土壤养分的供应、水分的保持及渗透、气体的交换等过程，还为土壤微生物提供了物理生境，并调控土壤有机碳的周转这一关键过程。土壤的孔隙特征能够直接、真实地反映土壤结构的好坏；用土壤的孔隙特征作为试验指标能更好地反映土壤结构对这些过程的调节作用。在此基础上，将高度异质性的土壤孔隙结构同土壤微环境的变化和土壤有机碳的周转过程进行定量分析，对深入了解土壤结构在土壤生态系统中的功能至关重要。因此，着重从土壤孔隙结构对土壤微环境的影响及其与有机碳的关系两方面展开 ...
张维俊 +7 more
doaj
Soil Particle Settlement Sorting and Distribution Characteristics of Carbon, Nitrogen and Salt During Gradual Thawing [PDF]
, 2023 [Objective] The classification of sediment particles and the accompanying distribution characteristics of carbon, nitrogen and salt in the process of soil thawing layer by layer under snowmelt runoff scenario were analyzed in order to identify the ...
Hu Yaxian +5 more
core +1 more source
Shuitu Baochi Xuebao, 2022 冻融循环作用下的土壤结构变化被认为是融雪期黑土坡面土壤侵蚀加剧的主要原因之一, 土壤团聚体稳定性与团聚体微结构是影响土壤可蚀性的关键因子。基于控制条件土壤冻融模拟试验, 采用湿筛法、扫描电子显微技术(SEM)和Image-Pro Plus(IPP)图像分析处理相结合的方法, 分析了冻融循环过程中黑土团聚体微结构的动态变化特征, 阐明了土壤团聚体水稳定性与团聚体微结构特征的内在联系。结果表明: (1)冻融循环对黑土团聚体水稳定性整体呈破坏作用。该作用在微观层面上表现为冻融循环驱动土壤孔隙趋于长条状发育 ...
王文刚 +4 more
doaj
Effects of different types of organic fertilizers on soil, growth and fruiting characteristics, and nut quality in walnut orchards [PDF]
[Objective] The study aimed to explore the effects of different organic fertilizers on the physical and chemical properties of the soil, tree growth, fruiting characteristics, and nut quality in a walnut orchard. [Methods] A randomized block experimental
JIANG Dezhi +6 more
core +1 more source
塔里木沙漠公路防护林土壤微生物生物量与土壤环境因子的关系 [PDF]
, 2009 为探讨极端干旱区风沙土土壤微生物与土壤环境因子的作用规律,采用相关分析法研究了塔里木沙漠公路防护林地土壤微生物生物量与理化因子和酶活性的关系.结果表明:土壤容重和粒径减小(R0.85)时,防护林地中土壤微生物数量和生物量有增大趋势,由容重与微生物量的相关性主导;土壤养分含量与土壤微生物数量和生物量呈正相关,主要由速效养分和放线菌、微生物生物量C、P的相关性所致;土壤酶活性与土壤微生物数量和生物量的相关性差异较大,R在0.51～0.91,主要取决于蔗糖酶、磷酸酶与放线菌、微生物量C的相关 ...
周宏伟 +7 more
core
Regression Analysis on Heat Transfer of U-tube BHE in Ground Coupled Heat Pump [PDF]
, 2010 In this paper,the numerical simulation is performed on the basis of the model describing heat transfer for single U-tube BHE(Borehole Heat Exchanger),and a single regression analysis and a multiple regression analysis on the heat exchange rate are ...
Chen Xu Fan Rui Long Weiding Ma Hongquan
core +1 more source
Shuitu Baochi Xuebao, 2005 运用土壤粒径质量分布原理与分形理论,对淄川峨庄流域内7种林分和对照荒草地的土壤结构特征进行研究。结果表明:①各种林分的土壤结构明显好于荒草地,不同林分类型中混交林分明显优于单纯林。良好的林分结构能明显提高土壤粒径的分布均匀程度与范围,改善土壤孔隙状况;②分形维数和重量平均直径能比较客观地表征土壤结构特征,是较为理想的土壤结构测定指标。混交林分分形维数均低于单纯林与荒草地,土壤重量平均直径均高于单纯林与荒草坡,说明混交林土壤结构稳定性最好,土壤通透性较好,具有较高的水土保持功能;③不同林分类型之间 ...
刘霞 王丽 张光灿 刘信儒 梁华
doaj +2 more sources
Method for scenario construction and decoupling of concentration field in buried natural gas pipeline leakage [PDF]
ObjectiveAs a crucial component of the global energy supply system, natural gas has seen its application scale continuously expand amid the ongoing transition to clean energy.
Junyao WU +5 more
core +1 more source
Water use characteristics of two Sonneratia mangrove species [PDF]
, 2017 红树林生长在热带、亚热带海岸潮间带。虽然海水充沛，但高盐度的海水使得土壤孔隙水水势极低，这在很大程度上限制了红树植物对水分的吸收，造成红树植物生理干旱的现象。红树植物大都采取了相同的水分利用策略，就是在节约用水的同时，最大程度地吸收水分。对红树植物的水分利用特征的研究是认识红树植物适应潮间带高盐及淹水胁迫的关键。本研究利用热扩散式茎流仪和微型气象站，在2015–2016年期间对深圳福田红树林自然保护区(22°31'N，114°0'E)内的两种同龄的海桑属红树植物，无瓣海桑 ...
赵何伟
core
Influence of mining-induced ground fissures on soil infiltration characteristics and its erosion effect in coal mining area of northern Shaanxi in the middle reaches of the Yellow River [PDF]
Cracking the soil and water loss effects of mining-induced surface fissures in the coal mining area of the middle reaches of the Yellow River is of great significance for ecological environment protection and high-quality development in the coal mining ...
Baodeng CHEN +6 more
core +1 more source