Results 31 to 40 of about 12,205 (202)
Rhizosphere Soil Nutrient and Enzyme Activity in Different Stand Age of Casurina equisetifolia Protection Forest [PDF]
, 2006 在福建省东山县滨海沙地,开展了不同年龄木麻黄林地根际和非根际土壤养分和酶活性的测定,研究结果表明:(1)不同年龄木麻黄林地根际pH小于非根际土壤,随林龄增长根际土壤和非根际土壤pH值均表现为下降趋势;根际土壤有机质、全氮和水解氮含量高于非根际土壤,各土层有机质含量在中龄林时最大;从中龄林阶段至过熟林,水解氮含量下降;全磷和速效磷含量从幼林发育至中龄林、近熟林逐渐减少,至过熟林略有恢复;根际土壤全钾、速效钾含量呈增加趋势。(2)不同年龄木麻黄林地根际CEC值、水解性总酸度、交换性盐基总量、交换性M g2 ...
侯杰 +5 more
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The Impact of Conflict in the Democratic Republic of Congo on the African Union's Agenda 2063
Sexuality, Gender &Policy, Volume 8, Issue 4, November 2025.ABSTRACT The Democratic Republic of Congo (DRC) remains a crucible of persistent conflict, particularly in its volatile eastern provinces. This article contends that the entrenched violence, exemplified by the recent resurgence of the M23 rebellion, constitutes a profound betrayal of the African Union's (AU) Agenda 2063 and its cornerstone initiative, “
Majani Edward
wiley +1 more source
Ultrasound in Obstetrics &Gynecology, Volume 66, Issue 5, Page 621-630, November 2025.ABSTRACT Objectives To compare the maternal hemodynamics of Chinese women at low and at high risk for preterm pre‐eclampsia (PE) and assess the differences in hemodynamic parameters between high‐risk women with or without prophylactic aspirin. Methods This was a prospective longitudinal case–control study of 857 Chinese women with a singleton pregnancy
X. Wang +11 more
wiley +1 more source
Shuitu Baochi Xuebao, 2000 测定了贵州喀斯特峡谷水保经济植物花椒根际和非根际土壤的理化性质；探讨了适宜花椒生长的土壤特性；提出了发展花椒生产的主要技术措施。
何腾兵 刘元生
doaj +2 more sources
Shuitu Baochi Xuebao, 2008 采用盆栽试验研究了酸性黄壤铅污染下4种草本植物根际土壤微生物数量和酶活性的变化。结果表明:植物根际土壤中细菌、真菌和放线菌对铅污染的响应因植物根系环境的不同而有所区别:4种植物根际土壤中细菌和真菌数量增加,但增幅不一致。黑麦草和早熟禾根际土壤放线菌数量降低,翦股颖根际土壤放线菌数量呈现波动起伏。4种植物根际土壤中过氧化氢酶活性、淀粉酶活性和中性磷酸酶活性与土壤铅含量都表现出负相关性,与淀粉酶活性负相关达到极显著,铅对黑麦草和狗牙根根际土壤脲酶活性表现出低浓度下激活高浓度下抑制 ...
石汝杰, 陆引罡
doaj
Rhizoremediation of Phenanthrene-Contaminated Sediment with Kandelia Obovata and Its Microbial and Zymologic Mechanisms [PDF]
, 2011 植物在修复多环芳烃（PolycyclicAromaticHydrocarbons，PAHs）等有机物污染的土壤中有较大的应用潜力。植物修复污染土壤的纵深研究产生了根际修复新技术。根际环境与根际微生物是植物降解、转化有毒有害有机污染物的基础。本论文在评价红树植物秋茄（Kandeliaobovata）修复菲（Phenanthrene，PHE）污染沉积物的潜能基础上，探讨了根际和非根际沉积物微生物和酶活性对不同浓度（5、10、20、40mg•kg-1）菲的响应 ...
方宇
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Functional Ecology, Volume 39, Issue 10, Page 2889-2904, October 2025.Read the free Plain Language Summary for this article on the Journal blog. Abstract In the Southwest Australian Biodiversity Hotspot, the greatest plant species diversity tends to occur on the most phosphorus (P)‐impoverished soils. Many plant species in this P‐impoverished environment release root carboxylates that mobilise soil P which is a more ...
Xue Meng Zhou +5 more
wiley +1 more source
Shuitu Baochi Xuebao, 2007 通过野外调查和盆栽试验研究了超积累植物东南景天根际土壤酶活性变化及其与重金属有效态的关系。研究结果表明,在矿山土壤、重度污染土壤和轻度污染土壤上,种植超积累生态型东南景天后,根际土壤有效态Zn分别比非根际减少了14.3%,7.9%和47.4%,有效态Cd分别比非根际减少25.1%,21.9%和20%。在铅锌矿区,东南景天生长地段土壤蔗糖酶、酸性磷酸酶、脱氢酶活性高于其它植物生长地段。在矿山土壤和重度污染土壤中,超积累生态型东南景天根际土壤酶活性明显高于非根际土壤,同时也高于非超积累生态型根际土壤。Pb ...
李廷强, 朱恩, 杨肖娥, 张玲
doaj
土壤呼吸作用时空动态变化及其影响机制研究与展望. [PDF]
, 2009 测定不同陆地生态系统土壤呼吸速率及其时空波动,阐明其影响因子,对于全球碳素平衡预算和全球变化潜在效应估计是最为基本的数据。然而,有关土壤呼吸作用变异性及其影响因素的知识仍存在局限性,一些关键的过程和机制还有待阐明。该文综述了近年来土壤呼吸作用时空动态规律、影响机制和模拟方面的研究进展,指出环境因子和生物因子共同驱动着土壤呼吸作用的时间动态变化;土壤呼吸作用在不同时间尺度上还具有明显的空间异质性,这主要是植被覆盖、根系分布、主要的环境因素和土壤特性空间分布的异质性造成的 ...
周广胜., 韩广轩
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Integrative Conservation, Volume 4, Issue 3, Page 442-463, September 2025.In this study, we analyze the conservation status of Ethiopia's amphibian and reptile diversity in terms of coverage with protected areas and global representation in conservation breeding facilities. We identify conservation gaps and suggest priorities for improvement.
Kolja Sperling +3 more
wiley +1 more source