检索结果-南通市图书馆

Early positive effects of tree species richness on soil organic carbon accumulation in a large-scale forest biodiversity experiment

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2019年第5期12卷 882-893页

作者： Yin Li Helge Bruelheide Thomas Scholten Bernhard Schmid Zhenkai Sun naili zhang Wensheng Bu Xiaojuan Liu Keping Ma State Key Laboratory of Vegetation and Environmental Change Institute of Botanythe Chinese Academy of SciencesBeijing 100093China University of Chinese Academy of Sciences Beijing 100049China Institute of Biology/Geobotany and Botanical Garden Martin Luther University Halle-WittenbergAm Kirchtor 106108 HalleGermany German Centre for Integrative Biodiversity Research(iDiv)Halle-Jena-Leipzig Deutscher Platz 5eD-04103 LeipzigGermany Department of Geosciences Soil Science and GeomorphologyEberhard Karls University TübingenRümelinstrasse 19-2372070 TübingenGermany Department of Geography University of ZürichWinterthurerstrasse 190CH-8057 ZürichSwitzerland Research Institute of Forestry Chinese Academy of ForestryBeijing 100091China College of Forestry Jiangxi Agricultural UniversityNanchang 330045China

Aims tree species richness has been reported to have positive effects on aboveground biomass and productivity,but little is known about its effects on soil organic carbon(SOC)*** to close this gap,we made use of a large biodiversity-ecosystem functioning experiment in subtropical china(BEF-china)and tested whether tree species richness enhanced SOC *** 2010 and 2015,vertically layered soil samples were taken to a depth of 30 cm from 57 plots ranging in tree species richness from one to eight *** squares-based linear models and analysis of variance were used to investigate tree diversity *** equation modeling was used to explore hypothesized indirect relationships between tree species richness,leaf-litter biomass,leaf-litter carbon content,fine-root biomass and SOC *** Findings Overall,SOC content decreased by 5.7 and 1.1 g C kg^(-1) in the top 0-5 and 5-10 cm soil depth,respectively,but increased by 1.0 and 1.5 g C kg^(-1) in the deeper 10-20 and 20-30 cm soil depth,*** SOC content to SOC stocks using measures of soil bulk density showed that tree species richness did enhance SOC accumulation in the different soil *** effects could only to some extent be explained by leaf-litter biomass and not by fine-root *** findings suggest that carbon storage in new forests in china could be increased by planting more diverse stands,with the potential to contribute to mitigation of climate warming.

关键词： BEF-china diversity fine-root biomass leaf-litter biomass soil carbon accumulation

The role of soil-borne fungi in driving the coexistence of Pinus massoniana and Lithocarpus glaber in a subtropical forest via plant-soil feedback

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2021年第6期14卷 1189-1203页

作者： Yumei Pan Zhongyuan Yao naili zhang G.F(Ciska)Veen College of Forestry Beijing Forestry UniversityBeijing 100083China Process Improvement Department ChanachunGeneScience Pharmaceutical Co.Ltd.Changchun 130012China Department of Terrestrial Ecology Netherlands Institute of Ecology(NIOO-KNAW)Droevendaalsesteeg 10Wageningen 6708 PBThe Netherlands

Aims Plant–soil feedback(PSF)is a key mechanism that can facilitate tree species coexistence and *** evidence suggests that species-specific soil-borne pathogens around adult trees limit the performance of home(conspecific)seedlings relative to foreign(heterospecific)***,the underlying mechanism remains largely *** Here,we conducted a reciprocal transplant pot experiment using seedlings and from two tree species,Pinus massoniana and Lithocarpus glaber that are dominant and coexist in a subtropical,evergreen,broad-leaf forest in Gutianshan,Zhejiang Province of eastern *** examined how seedlings from the two tree species responded to soils originating from underneath their own versus the other tree species,using a full-factorial ***,we added a fungicide(benomyl)to half of the pots to evaluate the role of soil-borne fungi on seedling *** Findings We found that the seedlings from *** grew better in soils that were collected from beneath the canopy of ***,while seedling growth of *** was not affected by soil *** addition of fungicide benomyl resulted in a shift towards more positive PSF effects for ***,indicating that *** seedlings performed better in their own soils than in soils from *** in the absence of *** findings highlight the importance of soil-borne pathogenic and ectomycorrhizal fungi in driving PSF,and indicate that PSF may promote the coexistence of two subtropical tree species by reducing the performance of *** in own soils.

关键词： benomyl fungicide addition plant pathogen saprotrophic fungi ectomycorrhizal fungi

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

日本的自由贸易战略转变与经验借鉴

学术前沿 2019年第22期 38-47页

作者：张乃丽山东大学经济学院

日本自由贸易战略受外部国际形势和国内经济动态的影响,经历了从"一维式"稳健参与WTO框架下多边贸易体制,到"多维式"积极快速推动跨区域、多边以及双边自由贸易协议的转变,并取得显著成果。同时,表现出阶段性突出、战略目标清晰、积极... 详细信息

日本自由贸易战略受外部国际形势和国内经济动态的影响,经历了从"一维式"稳健参与WTO框架下多边贸易体制,到"多维式"积极快速推动跨区域、多边以及双边自由贸易协议的转变,并取得显著成果。同时,表现出阶段性突出、战略目标清晰、积极主动、准确高效、高质量和高标准等特征。但在当今"单边主义"和贸易保护主义兴起的背景下,其自由贸易战略在各方博弈中也遭遇了各种挑战。因此,中国在全面开放格局下调整自由贸易战略,一方面可汲取日本自由贸易战略的精华;另一方面需选择符合本国经济发展水平的贸易协议,坚持"积极参与,避免冒进",坚持发挥智库和咨询机构的作用,做到"知己知彼,百战不殆"。

关键词：日本自由贸易战略日美同盟中日关系 WTO FTA

Arbuscular mycorrhizal fungi-mediated resistance to salt spray in Cinnamomum camphora seedlings enhanced by leaf functional traits

在线全文

学校读者我要写书评

暂无评论

Soil Ecology Letters 2024年第3期6卷 163-175页

作者： Xiao Li Duo Zheng naili zhang Lijia Dong Aiping Wu Qiqian Wu Hua Liu Mingshui Zhao Yan Li Xinping Wang Yanhong Wang State Key Laboratory of Subtropical Silviculture Zhejiang A&F UniversityHangzhou 311300China State Key Laboratory of Efficient Production of Forest Resources and the Key Laboratory of Silviculture and Conservation of Ministry of Education Beijing Forestry UniversityBeijing 100083China School of Life and Environmental Sciences Shaoxing UniversityShaoxing 312000China Ecology Department College of Environment and EcologyHunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake AreaHunan Agricultural UniversityChangsha 410128China Zhejiang Tianmu Mountain National Nature Reserve Administration Hangzhou 311311China

Salt spray is a natural disturbance in coastal *** mycorrhizal fungi(AMF)are recognized as bio-ameliorators of soil salinity in ***,the mechanism through which AMF protects Cinnamomum camphora against aerial salinity remains *** address this knowledge gap,plants were subjected to four fungal regimes,namely sterilized fungal inoculum,Glomus tortuosum,Funneliformis mosseae,or a combination of these two fungi,and exposed to three sprayed-salt regimes(0,7,or 14 mg NaCl cm−2 d−1)in a *** spray significantly decreased photosynthetic capabilities,total dry weight,and salinity tolerance of non-mycorrhizal *** inoculation,particularly a combination of *** and ***,evidently mitigated the detrimental effects induced by salt ***,mycorrhiza-mediated protection depended on the intensity of sprayed salt and the identity of fungal ***,the enhanced resistance of mycorrhizal *** seedlings to aerial salinity was mainly owing to increased leaf thickness and photosynthetic *** findings imply that inoculation with combined fungi could be an optimal strategy for cultivating *** plants in coastal *** results gained hold the potential to offer both theoretical and practical guidance for the managers of coastal ecosystems in soil restoration and conservation.

关键词： arbuscular mycorrhizal fungi leaf thickness photosynthetic capability salinity-tolerance salt spray

Arbuscular mycorrhizal fungi protect a subtropical tree species exposed to simulated acid rain by accelerating photosynthetic ability,antioxidant enzymes and osmolyte accumulation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Plant Ecology 2022年第5期15卷 1036-1048页

作者： Yanhong Wang Changliang Shao Yajing Qiu Shuquan Yu Lina Xia Xiaobin He Aiping Wu naili zhang State Key Laboratory of Subtropical Silviculture Zhejiang A F UniversityHangzhou 311300China National Hulunber Grassland Ecosystem Observation and Research Station&Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural SciencesBeijing 100081China Ecology Department College of Resources and EnvironmentHunan Provincial Key Laboratory of Rural Ecosystem Health in Dongting Lake AreaHunan Agricultural UniversityChangsha 410128China The Key Laboratory for Silviculture and Conservation of Ministry of Education Beijing Forestry UniversityBeijing 100083China

Acid rain(AR),which occurs frequently in southern China,negatively affects the growth of subtropical tree *** mycorrhizal fungi(AMF)mitigate the detrimental effects induced by ***,the mechanisms by which AMF protect Zelkova serrata,an economically important tree species in southern China,from AR stress remain *** conducted a greenhouse experiment in which *** plants were inoculated with AMF species Rhizophagus intraradices and Diversispora versiformis,either alone or as a mixed culture,or with a sterilized inoculum(negative control).The plants were subjected to three levels of simulated sulfuric AR and nitric AR(pH 2.5,4.0 and 5.6)to examine any interactive effects on growth,photosynthetic capabilities,antioxidant enzymes,osmotic adjustment and soil *** significantly decreased dry weight,chlorophyll content,net photosynthetic rate and soluble protein(SP)of non-mycorrhizal *** inoculation,especially a combination of *** and ***,notably improved dry weight,photosynthetic capabilities,catalase,peroxidase,superoxide dismutase,SP and root acid phosphatase activity of *** under harsh AR ***,the benefits from AMF symbionts depended on the identity of AM fungal species and the gradient of AR *** results indicate that AM fungi protect *** against AR stress by synchronously activating photosynthetic ability,antioxidant enzymes and osmolyte *** findings suggest that a combination of *** and *** may be a preferable choice for culturing *** southern China.

关键词： sulfuric and nitric acid rain mycorrhizal efficiency Zelkova serrata antioxidant enzymes photosynthetic capability solubleprotein

亚热带森林树种多样性对凋落叶分解胞外酶活性的影响

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

生物多样性 2021年第11期29卷 1447-1460页

作者：潘玉梅张乃莉北京林业大学林学院森林培育与保护教育部重点实验室北京100083

森林生物多样性与生态系统功能关系是当前群落生态学的热点研究领域。然而,以往研究更多聚焦在森林植物多样性丧失对群落生产力的影响,而对森林凋落物分解的相关研究稍显不足。森林凋落叶分解的快慢直接受控于凋落物分解者分泌的胞外酶... 详细信息

森林生物多样性与生态系统功能关系是当前群落生态学的热点研究领域。然而,以往研究更多聚焦在森林植物多样性丧失对群落生产力的影响,而对森林凋落物分解的相关研究稍显不足。森林凋落叶分解的快慢直接受控于凋落物分解者分泌的胞外酶的活性,后者更是指示森林生态系统养分循环的重要指标之一。本研究依托我国江西亚热带森林生物多样性与生态系统功能控制实验,通过对不同植物多样性梯度样方内目标树种凋落叶胞外酶活性、理化性质以及腐生真菌的分析,探索树种多样性丧失对胞外酶活性的影响及其调控机制,以探讨森林树种多样性对地表、地下生态过程和功能的影响。结果表明,样方水平树种多样性丧失显著影响胞外酶的活性,除单种样方外,随着样方水平树种丰富度的增加,胞外酶活性呈现出增长趋势;与碳周转相关的α-葡萄糖苷酶(AG)、β-葡萄糖苷酶(BG)、纤维二糖水解酶(CB)在树种多样性最大时活性达到最高;而木糖苷酶(XS)以及与氮、磷和顽拗有机养分分解相关的N-乙酰-β-氨基葡萄糖苷酶(NAG)、酸性磷酸酶(AP)和多酚氧化酶(PPO)在树种多样性较低时活性较高。针对目标树种周围的邻居树种多样性进一步分析发现,各胞外酶活性随着邻居树种多样性的变化呈"单峰"响应趋势,酶活性大多在邻居树种丰富度为6时呈现峰值。研究发现真菌分解者在胞外酶活性对植物多样性的响应上可能存在重要的调控作用,可以推测树种多样性通过改变腐生真菌分解者的群落结构和多度,从而影响胞外酶活性。

关键词：酶促降解凋落叶分解树种多样性邻居树种多样性腐生真菌亚热带森林

在线全文

学校读者我要写书评

暂无评论

松嫩草甸不同退化程度生境土壤磷素动态研究

应用与环境生物学报 2006年第6期12卷 777-782页

作者：张乃莉郭继勋中国科学院植物研究所北京100093 东北师范大学草地研究所长春130024

对松嫩草甸不同退化程度生境的几种代表植物群落土壤磷索状况的研究表明，各群落相同土层的全磷含量没有显著的差异，说明土壤磷库具有较强的弹性，土壤退化落后于地上植物群落的退化．各群落土壤全磷的季节变化相似，均经历迅速累积，... 详细信息

对松嫩草甸不同退化程度生境的几种代表植物群落土壤磷索状况的研究表明，各群落相同土层的全磷含量没有显著的差异，说明土壤磷库具有较强的弹性，土壤退化落后于地上植物群落的退化．各群落土壤全磷的季节变化相似，均经历迅速累积，达到峰值后下降，之后又有一个缓慢积累的过程．羊草、寸草苔和碱茅群落全磷含量随土层的加深而减少，虎尾草群落土壤全磷聚集于10—20cm土层．随退化程度的加重，土壤速效磷含量增加，虎尾草群落土壤速效磷占全磷的比重最高（2．8％），表明退化生境植物群落对速效磷素的利用并不充分．各群落土壤微生物量磷含量均高于速效磷含量，其季节动态均为单峰曲线，峰值出现在8月．虎尾草群落土壤微生物量磷在10-20cm的土层最多，其他群落土壤微生物量磷在0—10cm土层的含量最多．灰色分析的结果表明，土壤速效磷的形成主要受到土壤养分，尤其是碳、氮养分的影响；而土壤温度、水分状况、酸碱状况和盐化程度等因素对土壤微生物量磷的影响较强．

关键词：速效磷微生物量磷土壤因子灰色关联分析

数字政府建设与企业对外直接投资——来自国脉电子政务网的经验证据

在线全文

学校读者我要写书评

暂无评论

国际经贸探索 2024年第3期40卷 56-74页

作者：李明洋张乃丽山东大学经济学院

文章研究了数字政府建设对企业OFDI的影响,并探讨了这种影响的真实性、具体表现和经济后果。文章利用国脉网提供的电子政务数据衡量政府的数字化水平,并使用该指数进行实证检验,结果表明数字政府建设能够显著促进企业OFDI。作用渠道检... 详细信息

文章研究了数字政府建设对企业OFDI的影响,并探讨了这种影响的真实性、具体表现和经济后果。文章利用国脉网提供的电子政务数据衡量政府的数字化水平,并使用该指数进行实证检验,结果表明数字政府建设能够显著促进企业OFDI。作用渠道检验发现,数字政府建设能够通过优化营商环境、缓解融资约束、提升创新能力、改善政企关系影响企业OFDI。异质性分析表明,这种影响存在企业、行业和区域异质性。进一步研究发现,数字政府建设能够真实促进企业OFDI,提高OFDI深度;经济后果分析发现,数字政府建设促进企业OFDI能够提高企业的利润和生产率,提高企业所在城市的全要素生产率和创新能力。文章为真实促进企业OFDI提供了理论依据,对于如何实现高质量“走出去”具有启示和借鉴意义。

关键词：数字政府对外直接投资(OFDI) 上市企业真伪投资投资深度投资动机

产业结构、生产率与经济增长“减速”:基于日本都道府县面板数据的实证分析

在线全文

学校读者我要写书评

暂无评论

山东大学学报（哲学社会科学版） 2018年第1期 102-110页

作者：张乃丽欧家瑜山东大学经济学院

在测度产业结构合理化、产业结构高级化以及全要素生产率指标的基础上,根据二元经济理论的两部门经济增长模型,利用2002 2013年日本都道府县宏观面板数据,实证考察日本产业结构、全要素生产率与经济增长的内在关系。研究发现,日本产业... 详细信息

在测度产业结构合理化、产业结构高级化以及全要素生产率指标的基础上,根据二元经济理论的两部门经济增长模型,利用2002 2013年日本都道府县宏观面板数据,实证考察日本产业结构、全要素生产率与经济增长的内在关系。研究发现,日本产业结构不合理显著不利于经济增长;产业结构高级化以及全要素生产率提升是经济增长的重要推动力;扭转产业结构不合理给经济增长带来的负向效应,主要是得益于产业政策驱动生产要素,完成产业集群形成的产业链下生产要素在生产率不同部门之间的流动和再配置;但由于全要素生产率的低下,严重束缚产业结构高级化对经济增长的正向效应释放;此外,劳动生产率、劳动力利用效率、政府消费性支出以及社会固定资产投资均对日本经济增长有显著的促进作用。

关键词：产业结构生产率经济增长“减速” 动态面板模型日本