Results 31 to 40 of about 19,361 (106)

黄淮海地区林地最小生态需水量研究

open access: yesShuitu Baochi Xuebao, 2002
以黄淮海地区为例 ,对林地最小生态需水量的理论和方法进行探讨 ,研究内容主要包括 :(1 )从林地生态系统水量平衡关系出发 ,分析林地生态需水的各种表现形式 ,并对林地生态需水量概念进行界定 ;(2 )提出林地最小生态需水量的计算方法 ,对其中的土壤最小含水定额和最小蒸散定额进行理论探讨 ;(3)按照区域生态环境保护目标的要求 ,对黄淮海地区的林地合理面积进行规划 ;(4 )根据规划结果 ,在 GIS支持下计算研究区的林地最小生态需水量。研究表明 ,黄淮海地区的林地合理面积为 7.80万 km2 ...
张远 杨志峰
doaj   +2 more sources

Hierarchical Structured TiO2/Boron‐Doped Diamond for Efficient Photo‐Electrocatalytic Degradation

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT The discharge of refractory organic dye wastewater poses a significant threat to the ecological environment, necessitating the development of efficient treatment technologies. Herein, a uniform TiO2 array (TiO2‐AR) electrode is fabricated using a combination of magnetron sputtering and a mask plate process with a boron‐doped diamond (BDD ...
Haiming Sun   +10 more
wiley   +1 more source

Advancements and Applications of 3D Printing Techniques and Novel Materials in Soft Robotics for Medical Devices

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Additive manufacturing, commonly referred to as three‐dimensional (3D) printing, provides the geometric freedom and multi‐material integration needed to build soft medical robots for minimally invasive interventions, prosthetics, and rehabilitation.
Yao Wang   +5 more
wiley   +1 more source

森林植被生态需水量的确定和计算--以泾河流域为例

open access: yesShuitu Baochi Xuebao, 2004
森林植被的生态需水可以理解为林地的蒸散耗水量,与土壤含水量关系密切.根据土壤水分有效性的划分,林木暂时凋萎含水量和生长阻滞含水量分别是能保证林木基本生存和正常生长时土壤含水量的下限,因此,相应的林地耗水量分别为林地的最小生态需水定额和适宜生态需水定额,其数值通过计算林地的潜在蒸散并利用土壤水分修正系数和林木系数进行订正获得.根据最新遥感图像资料,在GIS支持下,计算了泾河流域现有林地生长季的最小生态需水量和适宜生态需水量,分别为203 960×104 m3和340 330×104 m3.
何永涛 闵庆文 李文华 李贵才
doaj  

Efficient Double Perovskite Cs2NaGdCl6: Sb3+/Pr3+ for Plant‐Cultivation Lighting, Advanced Optical Anti‐Counterfeiting, and WLED Applications

open access: yesRare Metals, Volume 45, Issue 5, May 2026.
ABSTRACT Developing multifunctional luminescent materials with tunable spectra is crucial for plant lighting and information–security applications. To address the critical requirement of plant photosynthesis for blue and red spectral components, a novel lead‐free double perovskite Cs2NaGdCl6: Sb3+, Pr3+ phosphor was designed and synthesized via a ...
Huangyao Chen   +7 more
wiley   +1 more source

东辽河流域河流系统生态需水研究

open access: yesShuitu Baochi Xuebao, 2001
河流系统的生态需水是指维持河流正常的生态结构和功能所需要的一定水质最小水量 ,具有明显的时空变化特征。河流系统的生态用水包括河道系统 (包括排沙生态用水和水面蒸发生态用水 )和洪泛地系统两大系统的生态用水。东辽河流域河道系统生态需水量占年均径流量的 44 .43%。洪泛地生态用水量为 16 .87亿 m3,占全流域年均降水量的 2 8.0 2 %。必需采取有效措施进行河流水资源开发的有效调控。
严登华 何岩 等
doaj   +2 more sources

Trends and Challenges in Water Governance Systematic Review and Bibliographic Study of Scientific Publications (2018–2025)

open access: yesWorld Water Policy, Volume 12, Issue 2, May 2026.
ABSTRACT Water governance has emerged as a critical analytical framework for addressing the complexity of socioecological water systems in contexts of increasing climate vulnerability and anthropogenic pressure. This study presents a systematic review and bibliometric analysis of 50 scientific articles indexed on water governance published between 2018
Roger Pichis‐García   +1 more
wiley   +1 more source

内陆河下游民勤绿洲主要防风固沙植被生态需水量研究

open access: yesShuitu Baochi Xuebao, 2007
通过大型蒸渗仪和植物径流测定系统对民勤绿洲5种主要防风固沙植物单株生态需水进行了测定,并结合G IS和野外调查,确定不同植被类型的面积、生态需水定额和生态需水量;通过天然降水与生态需水的耦合,分析了不同植被类型生态需水的时空变化规律。研究表明,5种植物年平均单株最大生态需水定额分别为:沙枣1597.4 mm、新疆杨806.77 mm、梭梭534.05 mm、柽柳426.76 mm、白刺318.83 mm;5种植被年最大生态需水总量为2.29×108m3;实际生态需水量分别为:新疆杨0.29×108m3 ...
徐先英   +4 more
doaj  

Internal physiological drivers of leaf development in trees: Understanding the relationship between non‐structural carbohydrates and leaf phenology

open access: yesFunctional Ecology, Volume 40, Issue 5, Page 1151-1164, May 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Plant phenology is crucial for understanding plant growth and climate feedback. It affects canopy structure, surface albedo, and carbon and water fluxes. While the influence of environmental factors on phenology is well‐documented, the role of plant intrinsic factors ...
Yunpeng Luo   +8 more
wiley   +1 more source

Jellyfish blooms restructure plankton dynamics and trophic linkages in coastal waters

open access: yesFunctional Ecology, Volume 40, Issue 5, Page 1443-1460, May 2026.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Jellyfish blooms are increasing globally in frequency and intensity, introducing complex ecological interactions, yet the mechanisms by which they alter ecosystem structure remain poorly characterized due to a lack of sustained field observations.
Pengpeng Wang   +4 more
wiley   +1 more source

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