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Species-dependent responses of soil microbial properties to fresh leaf inputs in a subtropical forest soil in South China

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Journal of Plant Ecology 2014年第1期7卷 86-96页

作者： Faming Wang Jin liu Bi Zou Deborah A.Neher Weixing Zhu zhian li Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems South China Botanical GardenChinese Academy of SciencesGuangzhou 510160China University of Chinese Academy of Science Beijing 100049China Department of Plant and Soil Science University of VermontBurlington VT 05405USA Department of Biological Sciences State University of New York-BinghamtonBinghamtonNY 13902USA

Aims Forest disturbance from extreme weather events due to climate change could increase the contribution of fresh green leaves to the litter layer of soil and subsequently alter the composition and activity of the soil microbial properties and soil carbon cycling.The objective of this study was to compare the effect of naturally fallen litter and fresh leaves on the soil microbial community composition and their activities.Methods Fresh leaves and normal fallen litter were collected from four tree species(Pinus elliottii,Schima superba,Acacia mangium,A.auriculaeformis)in subtropical China and mixed with soil.Soil microbial community composition was determined using PLFAs,and its activity was quantified by soil respiration.During a 12-month period,the decomposition rate of litter was measured bimonthly using a litterbag method.Soil microbial samples were collected after 6 and 12 months.Soil respiration was measured monthly.Important Findings We found that fresh leaves decomposed faster than their conspecific fallen litter.Although total microbial biomass and bacterial biomass were similar among treatments,soil fungal biomass was higher in fresh leaf than fallen litter treatments,resulting in greater values of the Fungal phospholipid fatty acids(PLFAs)/Bacterial PLFAs ratio.Fungal PLFA values were greater for Schima superba than the other species.The effect of litter type on soil respiration was species-dependent.Specifically,fallen litter released 35%more CO_(2) than fresh leaves of the conifer P.elliottii.The opposite pattern was observed in the broadleaf species whose fresh leaf treatments emitted 17%–32%more CO_(2) than fallen litter.Given future predictions that global climate change will cause more disturbances to forests,these results indicate that conifer and broadleaf forests in subtropical China may respond differently to increased fresh litter inputs,with net soil microbial respiration decreasing in conifer forests and increasing in broadleaf forests.

关键词： fresh leaf input forest disturbance soil microbial community soil respiration southern China

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Global blue carbon accumulation in tidal wetlands increases with climate change

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National Science Review 2021年第9期8卷 145-155页

作者： Faming Wang Christian J.Sanders Isaac R.Santos Jianwu Tang Mark Schuerch Matthew L.Kirwan Robert E.Kopp Kai Zhu Xiuzhen li Jiacan Yuan Wenzhi liu zhian li Department of Environmental Studies University of California Department of Atmospheric and Oceanic Sciences Fudan University CAS Key Laboratory of Aquatic Botany and Watershed Ecology Wuhan Botanical GardenChinese Academy of Sciences Xiaoliang Research Station for Tropical Coastal Ecosystems Key Laboratory of Vegetation Restoration and Management of Degraded Ecosystems and the CAS Engineering Laboratory for Ecological Restoration of Island and Coastal Ecosystems South China Botanical Garden Chinese Academy of Sciences Center of Plant Ecology Core Botanical Gardens Chinese Academy of Sciences Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) State Key Laboratory of Estuarine and Coastal Research and Institute of Eco-Chongming East China Normal University National Marine Science Centre School of Environment Science and Engineering Southern Cross University Department of Marine Sciences University of Gothenburg lincoln Centre for Water and Planetary Health School of Geography University of Lincoln Virginia Institute of Marine Science College of William and Mary Department of Earth and Planetary Sciences and Rutgers Institute of Earth Ocean and Atmospheric Sciences Rutgers University

Coastal tidal wetlands produce and accumulate significant amounts of organic carbon(C) that help to mitigate climate change. However, previous data limitations have prevented a robust evaluation of the global rates and mechanisms driving C accumulation. Here, we go beyond recent soil C stock estimates to reveal global tidal wetland C accumulation and predict changes under relative sea level rise, temperature and precipitation. We use data from literature study sites and our new observations spanning wide latitudinal gradients and 20 countries. Globally, tidal wetlands accumulate 53.65(95%CI: 48.52–59.01)Tg C yr-1, which is ～30% of the organic C buried on the ocean floor. Modeling based on current climatic drivers and under projected emissions scenarios revealed a net increase in the global C accumulation by2100. This rapid increase is driven by sea level rise in tidal marshes, and higher temperature and precipitation in mangroves. Countries with large areas of coastal wetlands, like Indonesia and Mexico, are more susceptible to tidal wetland C losses under climate change, while regions such as Australia, Brazil, the USA and China will experience a significant C accumulation increase under all projected scenarios.

关键词： coastal wetlands blue C C burial rate global change

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不同改良剂对珊瑚砂理化性质和氮素固持的影响

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热带亚热带植物学报 2024年第1期32卷 10-16页

作者：陈涵邹碧李应文李泳兴李志安陈慧娟王法明中国科学院华南植物园广州510650 广东省科学院生态环境与土壤研究所广州510650

高碱环境和土壤养分的匮乏严重限制了我国热带珊瑚岛土壤环境下植物的生长适应能力,因此,珊瑚砂改良对促进珊瑚岛植被恢复,维持珊瑚岛生态环境可持续健康发展具有重要意义。该研究通过室内土柱模拟试验,对比了同一梯度下4种常用土壤改... 详细信息

高碱环境和土壤养分的匮乏严重限制了我国热带珊瑚岛土壤环境下植物的生长适应能力,因此,珊瑚砂改良对促进珊瑚岛植被恢复,维持珊瑚岛生态环境可持续健康发展具有重要意义。该研究通过室内土柱模拟试验,对比了同一梯度下4种常用土壤改良材料(蛭石、珍珠岩、生物炭和钙基膨润土)对珊瑚砂理化性质、氮素淋溶以及总氮含量的影响。结果表明,与对照(CK)相比,施用生物炭使珊瑚砂pH显著降低1.4%,钙基膨润土、生物炭和蛭石能够显著提高珊瑚砂的阳离子交换量至CK的24.21、10.43和9.43倍。同时,施用生物炭、钙基膨润土和蛭石并不能降低以硝态氮形式为主的氮素淋失,但是能显著减少其他途径的氮素损失,从而达到促进珊瑚砂氮素固持的效果,3种改良剂施用下的珊瑚砂总氮损失相较于CK分别降低了40.92%、27.32%和25.09%。因此,施用生物炭、钙基膨润土和蛭石均能有效提高珊瑚砂土壤质量,对改良珊瑚砂和热带珊瑚岛植被恢复具有重要意义,其中生物炭的改良效果最为显著,是改良珊瑚砂的理想材料。

关键词：珊瑚砂土壤改良氮肥淋失氮素固持

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白冠长尾雉野外放归初期活动范围及变化规律

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湖南林业科技 2024年第3期51卷 100-104页

作者：姚艳逯金瑶宋林吴耀祥李芝兰李立李邵平湖南省生物多样性保护中心湖南长沙410004

为了加强珍稀濒危雉类物种保护,推进珍稀濒危雉类种群复壮进程,2021年9月在湖南壶瓶山国家级自然保护区放归了40只人工繁育的白冠长尾雉成体,利用红外自动数码照相机和GPS卫星定位信号发射器对放归的白冠长尾雉进行监测研究。结果显示:... 详细信息

为了加强珍稀濒危雉类物种保护,推进珍稀濒危雉类种群复壮进程,2021年9月在湖南壶瓶山国家级自然保护区放归了40只人工繁育的白冠长尾雉成体,利用红外自动数码照相机和GPS卫星定位信号发射器对放归的白冠长尾雉进行监测研究。结果显示:红外相机监测获得28张白冠长尾雉独立有效照片;给10只白冠长尾雉安装PTT,10只个体放归后每10d的移动距离为(448.34±309.80)m,活动范围(68753.99±59706.90)m^(2);白冠长尾雉在放归后的前20d移动距离和活动范围较小且比较稳定,在21~50d移动距离和活动范围逐渐增大,在51~70d移动距离和活动范围稍微减小,在71~80d移动距离和活动范围又逐渐增大达到最大值,在81~90d移动距离和活动范围减小;10只白冠长尾雉个体平均分布海拔为(1018.71±70.48)m,与其物种生态特性一致。本研究建议,后续进行雉类野外放归时应加强雉类野化训练,扩大野外放归范围,提高野外放归成功率。

关键词：白冠长尾雉野外放归卫星定位发射器活动范围

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大剂量阿托伐他汀联合双联抗血小板对急性脑梗死患者C3aR1的影响及颈动脉斑块的超声研究

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中国实用神经疾病杂志 2024年第7期27卷 843-848页

作者：康丽娟李盼耿丽颖孟琦李志安段雪娇郭艳敏保定市第一中心医院河北保定071000

目的探讨大剂量阿托伐他汀联合双联抗血小板对急性脑梗死患者补体激活3a受体1(C3aR1)及颈动脉斑块的影响。方法回顾性分析保定市第一中心医院诊治的129例急性脑梗死患者的一般资料,分为大剂量组65例,常规剂量组64例。常规剂量组接受常... 详细信息

目的探讨大剂量阿托伐他汀联合双联抗血小板对急性脑梗死患者补体激活3a受体1(C3aR1)及颈动脉斑块的影响。方法回顾性分析保定市第一中心医院诊治的129例急性脑梗死患者的一般资料,分为大剂量组65例,常规剂量组64例。常规剂量组接受常规剂量阿托伐他汀联合双联抗血小板治疗,大剂量组接受大剂量阿托伐他汀联合双联抗血小板治疗,比较2组患者颈动脉斑块面积、颈动脉内膜中层厚度(IMT)、NIHSS评分、生活自理量表(ADL)评分、超敏C反应蛋白(hs-CRP)、血脂、C3aR1及不良反应发生率。结果治疗后大剂量组甘油三酯(TG)、低密度脂蛋白胆固醇(LDL-C)、总胆固醇(TC)水平较常规剂量组低,高密度脂蛋白胆固醇(HDL-C)水平较常规剂量组高(P<0.05)。治疗后,大剂量组hs-CRP、C3aR1水平较常规剂量组低(P<0.05),颈动脉斑块面积较常规剂量组小,IMT较常规剂量组薄(P<0.05)。治疗后,大剂量组NIHSS评分较常规剂量组低,ADL评分较常规剂量组高(P<0.05)。2组治疗期间不良反应发生率比较(13.85%比9.38%)差异无统计学意义(χ^(2)=0.627,P=0.428)。结论大剂量阿托伐他汀联合双联抗血小板治疗可改善急性脑梗死患者的血脂水平,减轻炎症反应和神经损伤,降低C3aR1水平,减小颈动脉斑块面积,疗效确切,安全性高。

关键词：急性脑梗死大剂量阿托伐他汀氯吡格雷阿司匹林补体激活3a受体1 颈动脉斑块

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Removal of metals by sorghum plants from contaminated land

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Journal of Environmental Sciences 2009年第10期21卷 1432-1437页

作者： ZHUANG Ping SHU Wensheng li zhian liAO Bin li Jintian SHAO Jingsong Institute of Ecology South China Botanic Garden Chinese Academy of Sciences Guangzhou 510560 China. School of life Sciences and State Key Laboratory of Biocontrol Sun Yat-sen University Guangzhou 510275 China

The growth of high biomass crops facilitated by optimal of agronomic practices has been considered as an alternative to phytoremediation of soils contaminated by heavy metals. A field trial was carded out to evaluate the phytoextraction efficiency of heavy metals by three varieties of sweet sorghum （Sorghum biocolor L.）, a high biomass energy plant. Ethylene diamine tetraacetate （EDTA）, ammonium nitrate （NH4NO3） and ammonium sulphate （（NH4）2SO4） were tested for their abilities to enhance the removal of heavy metals Pb, Cd, Zn, and Cu by sweet sorghum from a contaminated agricultural soil. Sorghum plants always achieved the greatest removal of Pb by leaves and the greatest removal of Cd, Zn and Cu by stems. There was no significant difference among the Keller, Rio and Mray varieties of sweet sorghums in accumulating heavy metals. EDTA treatment was more efficient than ammonium nitrate and ammonium sulphate in promoting Pb accumulation in sweet sorghum from the contaminated agricultural soil. The application of ammonium nitrate and ammonium sulphate increased the accumulation of both Zn and Cd in roots of sorghum plants. Results from this study suggest that cropping of sorghum plants facilitated by agronomic practices may be a sustainable technique for partial decontamination of heavy metal contaminated soils.

关键词： Sorghum biocolor field trial phytoextraction

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In-situ coating and surface partial protonation co-promoting performance of single-crystal nickel-rich cathode in all-solid-state batteries

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Journal of Energy Chemistry 2024年第2期89卷 137-143,I0005页

作者： Maoyi Yi Jie li Mengran Wang Xinming Fan Bo Hong zhian Zhang Aonan Wang Yanqing Lai School of Metallurgy and Environment Central South UniversityChangsha 410083HunanChina Engineering Research Centre of Advanced Battery Materials The Ministry of EducationChangsha 410083HunanChina Hunan Province Key Laboratory of Nonferrous Value-Added Metallurgy Central South UniversityChangsha 410083HunanChina

The poor electrochemical performance of all-solid-state batteries(ASSBs),which is assemblied by Ni-rich cathode and poly(ethylene oxide)(PEO)-based electrolytes,can be attributed to unstable cathodic interface and poor crystal structure stability of Ni-rich cathode.Several coating strategies are previously employed to enhance the stability of the cathodic interface and crystal structure for Ni-rich cathode.However,these methods can hardly achieve simplicity and high efficiency simultaneously.In this work,polyacrylic acid(PAA)replaced traditional PVDF as a binder for cathode,which can achieve a uniform PAA-li(lixPAA(0liNi_(0.83)Co_(0.12)Mn_(0.05)O_(2)(SC-NCM83)due to H^(+)/li^(+)exchange reaction during the initial charging-discharging process.The formation of PAA-li coating layer on cathode can promote interfacial li^(+)transport and enhance the stability of the cathodic interface.Furthermore,the partially-protonated surface of SC-NCM83 casued by H^(+)/li^(+)exchange reaction can restrict Ni ions transport to enhance the crystal structure stability.The proposed SC-NCM83-PAA exhibits superior cycling performance with a retention of 92%compared with that(57.3%)of SC-NCM83-polyvinylidene difluoride(PVDF)after 200 cycles.This work provides a practical strategy to construct high-performance cathodes for ASSBs.

关键词： Single-crystal liNi_(0.83)Co_(0.12)Mn_(0.05)O_(2) In-situ coating PAA-li Partial protonation

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Inter-annual variation of the earth rotation and El Nio

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Chinese Science Bulletin 2002年第2期47卷 105-107页

作者： HAN Yanben ZHAO Juan li zhian National Astronomical Observatory Chinese Academy of SciencesBeijing 100012China Department of Astronomy Beijing Normal UniversityBeijing 100875China

The relationship between the inter-annual variations of the earth rotation, atmospheric angular momentum (AAM), sunspot number and El Ni(?)o is analyzed. The result shows that the inter-annual variation of the earth rotation responds to the variation of AAM and the preg-nancy of El Ni(?)o timely. Generally, the inter-annual compo-nent of the earth rotation will reach zero in a changing proc-ess that increases from the negative to the positive extreme before El Ni(?)o occurs about half year or more. And the solar activity may have certain influence on the appearance of El Ni(?)o. We consider that El Ni(?)o will possibly appear around the end of 2001.

关键词： El Nino inter-annual variation of earth rotation atmospheric angular moment solar activity.

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元太宗朝汉军万户整编新探

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历史研究 2022年第4期 44-65,220-221页

作者：李治安南开大学历史学院天津300350

元太宗朝汉军万户设置由丛杂走向正规,还增设西路分支。刘黑马居“三万户”、“七万户”及西路万户之首,考察其名称、内部建构及“宣命”,可窥汉军万户正规化之滥觞。1240年后,西路增设郝和尚、梁瑛、李彀、奥屯世英、张扎古带等多名万... 详细信息

元太宗朝汉军万户设置由丛杂走向正规,还增设西路分支。刘黑马居“三万户”、“七万户”及西路万户之首,考察其名称、内部建构及“宣命”,可窥汉军万户正规化之滥觞。1240年后,西路增设郝和尚、梁瑛、李彀、奥屯世英、张扎古带等多名万户且征行、奥鲁皆备,“宣命”亦有推广。无论是东部主体,还是西路分支,朝觐“宣命”等乃整编关键。凡获“宣命”者即为朝廷正规万户,以往将帅“承旨”、诸王令旨等滥用者或黜退、或搁置。紧扣“宣命”,不仅能廓清太宗朝汉军万户走向正规的真相,还可探知蒙古汗廷集权与“汉法”两种因素的早期混合。

关键词：元太宗汉军万户西路增设宣命

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The pathogenesis and prognosis of left-sided cardiac small by fetal echocardiography

The pathogenesis and prognosis of left-sided cardiac small b...

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中华医学会第十三次全国超声医学学术会议

作者： lin liu Yihua He zhian li lianzhong Zhang Yanan li Cunying Cui Yuanyuan liu Department of Ultrasound Henan Provincial Hospital Henan Cardiovascular Hospital Department of Ultrasound Beijing Anzhen HospitalCapital Medical University

Objective The major causes of fetal left-sided cardiac small is hypoplastic left heart syndrome,however, other causes lead to fetal left-sided cardiac small,different pathogenesis results in different prognosis.The aim of study was to explore the pathogenesis and prognosis of left-sided cardiac small by fetal echocardiography,provide left-sided cardiac small with comprehensive and accurate diagnose.Methods 2590 fetus were performed by fe-

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