Results 71 to 80 of about 448 (125)

Study on Transportation and Toxic Effects of Typical PAHs in Mangrove Wetland Simulation System [PDF]

open access: yes, 2008
红树林生态系统是热带、亚热带海岸重要的湿地生态系统。河口海岸带生态破坏性开发活动的日益频繁和大量的工农业废水和生活污水的长期直排入近岸海域使红树林湿地遭受极大的破坏。红树林湿地生态系统因生产力高、富含有机质以及强还原性环境条件等特性,使之成为吸收和积累多环芳烃(PolycyclicAromaticHydrocarbons,PAHs)的重要场所。因此,深入开展红树林湿地中PAHs污染物的环境行为及其对红树林生境的生态效应的研究,具有重要意义。 菲(Phenanthrene,PHE)和荧蒽 ...
洪有为
core  

砒砂岩地区3种主要树种边材液流动态特征

open access: yesShuitu Baochi Xuebao, 2017
为深入了解砒砂岩地区主要树种的水分利用特征,以内蒙古圪秋沟小流域砒砂岩区水土保持科技示范区为研究区域,运用茎热平衡法(SHB)对沙棘、柠条、油松3种主要树种蒸腾耗水进行研究,监测3种树种的边材液流日变化及不同天气条件下的液流速率。结果表明:(1)在生长期内,3种树种的液流速率均呈单峰曲线,其到达峰值时间大体相同。(2)在晴天时,沙棘的平均液流速率最高,可达到0.117 72 cm/s,而油松与柠条的液流速率相近,3种树种的日平均流速分别为0.029 01,0.018 15,0.022 03 cm/s ...
尉迟文思, 韩兆敏
doaj  

Effect of different light qualities on photosynthetic characteristics and fruit quality of Shine Muscat grapevines grown under rain-sheltered cultivation [PDF]

open access: yes
[Objective] Light serves as a pivotal environmental regulator in plant morphogenesis and physiological adaptation. Under grape facility cultivation, particularly with rain-shelter systems, insufficient light frequently constrains photosynthetic ...
CHEN Guangxia   +9 more
core   +1 more source

[Effects of interleukin-4-modified gold nanozymes on the full-thickness skin defects in diabetic mice]. [PDF]

open access: yesZhonghua Shao Shang Yu Chuang Mian Xiu Fu Za Zhi, 2023
Yao MY   +7 more
europepmc   +1 more source

4种苔藓植物在喀斯特石漠化地区的生态修复意义

open access: yesShuitu Baochi Xuebao, 2018
为探求苔藓植物在石漠化地区的生态修复意义,筛选出4种石漠化地区常见的苔藓,即美灰藓(Eurohypnum leptothallum)、小青藓(Brachythecium perminusculum)、双色真藓(Bryum dichotomum)和多疣细羽藓(Cyrto-hypnum pygmaeum),测定其生物量、饱和吸水率、根系密度、蒸腾速率和抗冲刷能力,并初次将该4种苔藓应用于石漠化修复的实践中,对其土壤酶活性进行了1年的跟踪监测。结果表明:(1)4种苔藓持水保水能力差异显著 ...
刘润, 申家琛, 张朝晖
doaj  

Effects of Salinity and Sediments to Growth and Total Flavonoids Content of Acanthus ilicifolius [PDF]

open access: yes, 2008
通过设置不同盐度、基质的室外培养实验,研究了老鼠簕(AcanthusilicifoliusL.)在不同盐度和基质生境条件下的生长、生理特性及体内总黄酮含量的变化。设计6个盐度水平:0、5、10、15、25和35;5个基质水平:100%海泥+0%砂、70%海泥+30%砂、50%海泥+50%砂、30%海泥+70%砂(V/V)、红壤土,均以盐度5的人工海水进行培养,分别用0%、30%、50%、70%、RS表示。培养365d。分析探讨了盐度、基质对老鼠簕幼苗的生长、生物量分配、光合作用、丙二醛含量(MDA ...
诸姮
core  

Soil Hydrothermal Characteristics of Orchard Based on Leaf Area Index Coupled with STEMMUS Model [PDF]

open access: yes
[Objective] As a key parameter in the simulation study of ecosystem water cycle process, rapid dynamic simulation of leaf area index (LAI) can solve the limitation that the coupled soil water-vapor-heat-air model STEMMUS (simultaneous transfer of energy,
GAO Xiaodong   +3 more
core   +1 more source

Impairment of endometrial decidual reaction in early pregnant mice fed with high fat diet. [PDF]

open access: yesZhejiang Da Xue Xue Bao Yi Xue Ban, 2022
Chen Z   +8 more
europepmc   +1 more source

Responses of mangrove associate plant Derris trifoliata to tidal inundation [PDF]

open access: yes, 2011
鱼藤是红树林常见攀援类伴生植物,是红树林生态系统的组成部分。抗淹水能力和独特的生长方式影响着它在潮间带的分布规律,并使得鱼藤与红树植物有着密切的联系。本研究根据红树林分布的潮位特征和在潮间带对应的淹水时间,采用室内模拟潮汐淹水控制实验,将正规半日潮条件下的潮间带平均分成7个等级,每个等级的淹水时间间隔2h,在每个潮汐循环的淹水时间分别为:0h(不淹水)、2h、4h、6h、8h、10h和12h,每天完成两个循环。在上述条件下,对鱼藤幼苗进行没顶淹水胁迫处理,同时在每个淹水处理中设置支持物 ...
童康
core  

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