Results 21 to 30 of about 13,078 (148)
Shuitu Baochi Xuebao, 2003 在分析土壤水分特征曲线经验模型中特征参数的基础上，选取5种不同质地土壤，利用张力计测定了土壤水分特征曲线，根据实验资料确定了土壤水分特征曲线经验模型中参数，采用回归分析方法建立了参数与土壤物理特性间的函数关系，为采用土壤颗粒组成等土壤物理特性确定土壤水分特征曲线提供了指导。
来剑斌 王全九
doaj +2 more sources
Shuitu Baochi Xuebao, 2008 植物的固土抗蚀作用大小与其根系密切相关,而根系特征决定了根的固土抗蚀作用的发挥,本文以相同基质下构树和顶坛花椒不同特征的根系为研究对象.通过研究根系特征与土壤抗冲性、抗蚀性、抗拉性、紧实度的关系,结果表明,苗期根系能强化土壤抗冲性,构树苗、顶坛花椒苗根系强化值大小分别为78.01>77.71;根系可提高土壤抗蚀性,其抗蚀性强弱为.构树苗>顶坛花椒苗>对照,构树、顶坛花椒、对照试验的土壤水稳性指数分别为4.36,3.16,1.67;不同树种根系对土壤的固结能力不同,构树苗生长下的土壤抗拉能力为214.92
付兴涛 +3 more
doaj
Mechanical mechanism and parameters sensitivity analysis of the steel frame-geotextile system for the pre-reinforcement of flow plastic soil [PDF]
In reclamation projects for port construction, the pre-reinforcement of flow plastic fill soils is critical for promoting deep drainage consolidation and enhancing subgrade bearing capacity.
Jianing HUANG +5 more
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Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 6, Page 747-753, December 2025.ABSTRACT Objective Ultrasound‐based fetal growth assessment is an essential part of clinical decision‐making in modern obstetric care. This study aimed to evaluate the impact of maternal and fetal characteristics on the accuracy and precision of sonographic fetal weight estimation.
M. Granfors +4 more
wiley +1 more source
Shuitu Baochi Xuebao, 2002 采用土钻法和盆栽试验研究了渭北地区主要造林树种的垂直根系分布特征及其抗旱性。结果表明立地条件对刺槐根系分布特征有明显的影响 ,林地土壤水分状况的差异是造成这种影响的关键所在 ;土壤种类、结构等对刺槐根系的分布特征也有很大的影响 ;不同树种在根系垂直分布特征方面存在着很大的差异 ,其中刺槐的根系分布最深 ;在一定的土壤干旱范围内 ,苗木可以通过提高根系活力来适应逆境 ,当土壤干旱超过一定的阈值后 ,树木根系将逐步丧失其活力和功能 ,最终导致地上部分的枯死 ;在供试的 4个树种中 ,山杏根系的抗旱性最强 ...
赵忠 李鹏
doaj
Effects of Different Vegetation Restoration Measures on the Disintegration Characteristics of Eroded Degraded Land of Pinus massoniana in Red Soil Region [PDF]
[Objective] To investigate the characteristics of soil disintegration under different vegetation restoration measures in degraded land of Pinus massoniana, compare the improvement of soil disintegration in severely degraded P.
LIN Qiang +8 more
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Functional Ecology, Volume 39, Issue 12, Page 3504-3516, December 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract Nitrogen (N) deposition strongly affects litter decomposition and nutrient release, thereby reshaping carbon cycling in terrestrial ecosystems. Although most studies have focused on above‐ground litter, the effects of N addition on fine root decomposition and their ...
Yuneng Wang +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2019 土壤大孔隙是土壤水分、空气、化学物质及污染物优先运移的主要通道，对其形成机制的研究至关重要。以往对大孔隙的量化局限于传统方法，大孔隙三维形态特征的量化分析及其影响因素是目前大孔隙的研究重点。利用CT扫描及图像处理分析技术量化大孔隙三维形态特征参数，同时测定土壤基本理化性质及根长密度，分析土壤大孔隙三维特征对土壤理化性质及根系的响应。结果表明：土壤密度及土壤砂粒含量与大孔隙特征参数不存在相关关系）土壤有机质含量、土壤根长密度与大孔隙体积密度、大孔隙表面积密度、大孔隙数量密度呈现显著正相关关系 ...
孟晨, 牛健植, 骆紫藤, 尹正聪
doaj
The roles of macrophytes in maintenance of aqua-ecosystem health [PDF]
, 2014 大型水生植物对维持水生态系统的健康非常重要。水生植物通过为水生动物和微生物提供食物和栖息地、对进入水体的径流进行拦截、过滤和吸附、从水体和沉积物中吸收氮、磷和重金属元素等污染物、进行光合作用为水生态系统提供氧气、化感作用抑制藻类生长等途径维持水体生态系统的健康发展。认识到水生植物是水生态系统的重要组成部分,又是水生态系统健康的一项重要指标,对水生态健康的维持、水资源的保护和永续利用具有重要的意义。Macrophytes play multiple roles in maintaining the ...
叶碎高, 汪秀芳, 薛淋淋
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Global Change Biology, Volume 31, Issue 11, November 2025.This study assessed the potential impacts of climate and land‐use change on soil fungal diversity across four North American biomes. We found that climate change typically caused both diversity losses and gains, particularly in coniferous forests and among arbuscular mycorrhizal fungi, whereas land‐use change mainly reduced diversity, especially in ...
Wenqi Luo +5 more
wiley +1 more source