检索结果-南通市图书馆

Key processes of carbon cycle and sink enhancement paths in natural wetland ecosystems in China

Science China Earth Sciences 2024年第8期67卷 2444-2459页

作者： Jinshuai LI tianxiang hao Meng YANG Guirui YU Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of Sciences College of Resources and Environment University of Chinese Academy of Sciences

Wetland ecosystems have become one of the long-term solutions for mitigating global climate change due to their strong carbon sequestration potential. However, the key carbon cycle processes in wetland ecosystems still lack a systematic summary. In the context of wetland protection and restoration, there is still a lack of consensus on the technical pathways to realize carbon sink multiplication in wetland ecosystems. In this paper, the key processes of carbon cycle, such as photosynthetic carbon uptake, microbial carbon decomposition and carbon deposition and burial, are sorted out and summarized in four major wetland types, namely, swamp and peat wetlands, river and riparian wetlands, lake and lakeshore wetlands, and estuarine and coastal wetlands. Based on the key processes of carbon cycle, three technological pathways for carbon sink multiplication are proposed, including, vegetation carbon sequestration and sink enhancement technology, soil carbon emission reduction technology and carbon deposition and burial technology. The key technologies under each pathway are further refined. And the carbon sink effects of the carbon sink technologies in different wetland types are qualitatively described. Also, wetland protection and restoration methods in corresponding regions are given in the light of the regional characteristics of wetlands in China. This will provide a scientific basis for the strategy of doubling the carbon sinks of China′s wetland ecosystems.

关键词： Wetlands Carbon cycle Carbon sinks Technology pathways Conservation and restoration

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Effects of nitrogen addition on carbonate-derived CO_(2) emission after biochar addition

引用

Soil Ecology Letters 2023年第4期5卷 39-49页

作者： Zhaoan Sun tianxiang hao Biao Zhu Key Laboratory of Biochemistry and Molecular Biology in University of Shandong College of Seed and Facility Agricultural EngineeringWeifang UniversityWeifang 261061China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China Institute of Ecology College of Urban and Environmental Sciencesand Key Laboratory for Earth Surface Processes of the Ministry of EducationPeking UniversityBeijing 100871China

●We studied the effect of nitrogen and biochar on CO_(2) emission from SOC and SIC.●Nitrogen increased SIC-derived CO_(2) by 41%but decreased SOC-derived CO_(2) by 20%.●Biochar reduced total soil-derived CO_(2) by neutralizing nitrogen-induced acidity.●We proposed a method for 3-or 4-source partitioning CO_(2) emission from calcareous soils.Biochar addition generally increases the alkalinity regeneration to resist soil acidification driven by nitrogen(N)fertilization.Calcareous soils contain soil organic carbon(SOC)and inorganic C(SIC).Owing to technical limitations in three-source partitioning CO_(2),how biochar addition affects SOC-and SIC-derived CO_(2) emission has not been clarified yet.Therefore,we conducted a 70-day incubation experiment of ammonium-N and maize-straw-derived biochar additions to investigate the N plus biochar impacts on SOC-and SIC-derived CO_(2) emission.Over the 70-day incubation,we found that the N-only addition increased the SIC-derived CO_(2) emission by approximately 41%compared with the control,but decreased the SOC-derived CO_(2) emission by approximately 20%.This suggests that the distinct responses of SIC-and SOC-derived CO_(2) emission to N-only addition come from N-induced acidification and preferential substrate(N)utilization of soil microorganisms,respectively.Compared with N-only addition,N plus biochar addition decreased the SIC-derived CO_(2) emission by 17%−20%during the first 20 days of incubation,but increased it by 54%during the next 50 days.This result suggested that biochar addition reduced the SIC-derived CO_(2) emission likely due to the alkalization capacity of biochar exceeding the acidification capacity of ammonium-N in the short term,but it may increase the SIC-derived CO_(2) emission induced by the weak acidity produced from biochar mineralization in the long term.This study is helpful to improve the quantification of CO_(2) emission from calcareous soils.

关键词： biochar soil organic carbon soil inorganic carbon three-source partitioning soil CO_(2)emission 13C isotope

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

RESEARCH PROGRESS ON THE IMPACT OF NITROGEN DEPOSITION ON GLOBAL GRASSLANDS

引用

Frontiers of Agricultural Science and Engineering 2022年第3期9卷 425-444页

作者： Carly J.STEVENS Sofía BASTO Michael DBELL tianxiang hao Kevin KIRKMAN Raul OCHOA-HUESO Lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK Unidad de Ecologia y Sistematica Departamento de BiologiaFacultad de CienciasPontificia Universidad JaverianaCarrera 7 No.43-82 Ed.Jesus Emilio Ramirez(53)BogotaColombia National Park Service Air Resources DivisionLakewoodCO 80235USA Synthesis Research Center of Chinese Ecosystem Research Network Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Resources and Environmental Sciences National Academy of Agriculture Green DevelopmentKey Laboratory of Plant-Soil Interactions of Ministry of EducationBeijing Key Laboratory of Farmland Soil Pollution Prevention and RemediationChina Agricultural UniversityBeijing 100193China School of Life Sciences University of KwaZulu-NatalDurban4041South Africa Departamento de Biologia-IVAGRO Universidad de CadizCampus Rio San Pedro11510 Puerto RealSpain Department of Terrestrial Ecology Netherlands Institute of Ecology(NIOO-KNAW)P.O.Box 506700 ABWageningenthe Netherlands

Grasslands are globally-important ecosystems providing critical ecosystem services.The species composition and characteristics of grasslands vary considerably across the planet with a wide variety of different grasslands found.However,in many regions grasslands have been impacted by atmospheric nitrogen deposition originating from anthropogenic activities with effects on productivity,species composition and diversity widely reported.Impacts vary across grassland habitats but many show declines in species richness and increases in biomass production related to soil eutrophication and acidification.At a continental level,there is considerable variation in the research effort that has been put into understanding the impacts of nitrogen deposition.In Europe,North America and parts of Asia,although there are unanswered research questions,there is a good understanding of N deposition impacts in most grassland habitats.This is not the case in other regions with large knowledge gaps in some parts of the world.This paper reviews the impacts of N deposition on grasslands around the world,highlighting recent advances and areas where research is still needed.

关键词： acidification biomass production critical load eutrophication species composition species richness

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

A NEW APPROACH TO HOLISTIC NITROGEN MANAGEMENT IN CHINA

引用

Frontiers of Agricultural Science and Engineering 2022年第3期9卷 490-510页

作者： Xuejun LIU Zhenling CUI tianxiang hao Lixing YUAN Ying ZHANG Baojing GU Wen XU hao YING Weifeng ZHANG Tingyu LI Xiaoyuan YAN Keith GOULDING David KANTER Robert HOWARTH Carly STEVENS Jagdish LADHA Qianqian LI Lei LIU Wim DE VRIES Fusuo ZHANG Key Laboratory of Plant-Soil Interactions of Ministry of Education National Academy of Agriculture Green DevelopmentCollege of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijing 100101China College of Environmental&Resource Sciences Zhejiang UniversityHangzhou 310058China College of Tropical Crops Hainan UniversityHaikou 570228China State Key Laboratory of Soil and Sustainable Agriculture Nanjing Institute of Soil ScienceChinese Academy of SciencesNanjing 210008China Department of Sustainable Agriculture Sciences Rothamsted ResearchHarpenden AL52JQUK Department of Environmental Studies New York UniversityNew YorkNY 10003USA Department of Ecology&Evolutionary Biology Cornell UniversityIthacaNY 14853USA Lancaster Environment Centre Lancaster UniversityLancasterLA14YQUK Department of Plant Sciences University of CaliforniaDavisDavisCA 95616USA School of Life Sciences Jiangsu Normal UniversityXuzhou 221116China College of Earth and Environmental Sciences Lanzhou UniversityLanzhou 730000China Environmental Systems Analysis Group Wageningen University&ResearchPO Box 476700 AA Wageningenthe Netherlands.

Since the 1980s,the widespread use of N fertilizer has not only resulted in a strong increase in agricultural productivity but also caused a number of environmental problems,induced by excess reactive N emissions.A range of approaches to improve N management for increased agricultural production together with reduced environmental impacts has been proposed.The 4R principles(right product,right amount,right time and right place)for N fertilizer application have been essential for improving crop productivity and N use efficiency while reducing N losses.For example,site-specific N management(as part of 4R practice)reduced N fertilizer use by 32%and increased yield by 5%in China.However,it has not been enough to overcome the challenge of producing more food with reduced impact on the environment and health.This paper proposes a new framework of food-chainnitrogen-management(FCNM).This involves good N management including the recycling of organic manures,optimized crop and animal production and improved human diets,with the aim of maximizing resource use efficiency and minimizing environmental emissions.FCNM could meet future challenges for food demand,resource sustainability and environmental safety,key issues for green agricultural transformation in China and other countries.

关键词： 4R technology food chain N management N use efficiency soil-crop system sustainable management

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国区域生态恢复和环境治理的生态系统原理及若干学术问题

引用

应用生态学报 2023年第2期34卷 289-304页

作者：于贵瑞郝天象杨萌中国生态系统研究网络综合研究中心中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室北京100101 中国科学院大学资源与环境学院北京100049

当代生态学是解决全球可持续发展面临的重大资源、环境和生态问题的分析手段和哲学理念。生态学在其长期发展过程中,不断汲取、融合相关学科营养,形成了与气候系统、生物系统和社会经济系统紧密联系的当代生态学及生态系统科学体系,提... 详细信息

当代生态学是解决全球可持续发展面临的重大资源、环境和生态问题的分析手段和哲学理念。生态学在其长期发展过程中,不断汲取、融合相关学科营养,形成了与气候系统、生物系统和社会经济系统紧密联系的当代生态学及生态系统科学体系,提出的诸多生态系统原理可直接服务于区域生态恢复和环境治理等社会实践。新阶段的国家需求赋予了生态学新使命,亟需总结凝练宏观生态系统原理,应用于区域生态恢复和环境治理,促进社会经济高质量发展。本文以全球可持续发展面临的多重严峻挑战为背景,系统阐述了生态系统科学的逻辑思维和科学使命,梳理了生态恢复和环境治理的生态系统科学原理体系,讨论了中国区域生态恢复和环境治理的若干学术问题。最后强调指出,中国区域拥有多个具有全球意义的区域性宏生态系统,开展宏生态系统理论和实践研究,不仅是我国生态文明建设的迫切需要,更是生态系统科学研究的前沿阵地,有望为生态学理论发展及全球生态环境治理做出新贡献。

关键词：区域生态恢复区域环境治理生态系统原理宏观生态系统

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Atmospheric deposition of inorganic nitrogen in a semi-arid grassland of Inner Mongolia, China

引用

Journal of Arid Land 2017年第6期9卷 810-822页

作者： ZHANG Yibo XU Wen WEN Zhang WANG Dandan hao tianxiang TANG Aohan LIU Xuejun College of Resources and Environmental Sciences China Agricultural University State Key Laboratory of Urban and Regional Ecology Research Center for Eco-Environmental Sciences Chinese Academy of Sciences

Due to increasing global demand for crop production and energy use, more and more reactive nitrogen（Nr） has been generated and emitted to the environment. As a result, global atmospheric nitrogen（N） deposition has tripled since the industrial revolution and the ecological environment and human health have been harmed. In this study, we measured dry and wet/bulk N deposition from July 2013 to December 2015 in a semi-arid grassland of Duolun County, Inner Mongolia, China. The samples of dry and wet/bulk N deposition were collected monthly with a DELTA（DEnuder for Long Term Atmospheric sampling） system and with Gradko passive samplers and a precipitation gauge. The measured results show that the annual mean concentrations of NH_3, NO_2, HNO_3, particulate NH_4~＋（pNH_4~＋） and particulate NO_3^-（pNO_3^-） in atmosphere were 2.33, 1.90, 0.18, 1.42 and 0.42 μg N/m3, respectively, and that the annual mean volume-weighted concentrations of NH_4~＋-N and NO_3^--N in precipitation were 2.71 and 1.99 mg N/L, respectively. The concentrations of Nr components（including NH_3, NO_2, HNO_3, p NH_4~＋, pNO_3^-, NH_4~＋-N and NO_3^--N） exhibited different seasonal variations. Specifically, NO_2 and HNO_3 exhibited higher concentrations in autumn than in summer, while the other Nr components（NH_3, pNH_4~＋, pNO_3^-, NH_4~＋-N and NO_3^--N） showed the highest values in summer. Based on measured concentrations of Nr components and their deposition velocities estimated using the GEOS-Chem global atmospheric chemical transport model, the calculated annual mean dry deposition fluxes were 3.17, 1.13, 0.63, 0.91 and 0.36 kg N/（hm^2·a） for NH_3, NO_2, HNO_3, p NH_4~＋ and pNO_3^-, respectively, and the calculated annual mean wet/bulk deposition fluxes were 5.37 and 3.15 kg N/（hm^2·a） for NH_4~＋-N and NO_3^--N, respectively. The estimated annual N deposition（including dry N deposition and wet/bulk N deposition） reached 14.7 kg N/（hm^2·a） in grassland of Duolun County, approaching to the upper limit of the N critical load（10–15 kg N/（hm^2·a））. Dry a

关键词： atmospheric reactive nitrogen dry deposition wet/bulk deposition reduced nitrogen grassland ecosystem Inner Mongolia

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

中国碳达峰、碳中和行动方略之探讨

引用

中国科学院院刊 2022年第4期37卷 423-434页

作者：于贵瑞郝天象朱剑兴中国科学院地理科学与资源研究所中国科学院生态系统网络观测与模拟重点实验室北京100101 中国科学院大学资源与环境学院北京100049

中国碳达峰、碳中和(以下简称“双碳”)行动是一项涵盖全域国土空间、国家主导全民参与、长期持续实施的巨大系统工程,需要有明确且兼具韧性和适应性的行动方略。文章在梳理“双碳”现状的基础上,探讨了中国实现“双碳”目标的行动方略... 详细信息

中国碳达峰、碳中和(以下简称“双碳”)行动是一项涵盖全域国土空间、国家主导全民参与、长期持续实施的巨大系统工程,需要有明确且兼具韧性和适应性的行动方略。文章在梳理“双碳”现状的基础上,探讨了中国实现“双碳”目标的行动方略、技术途径与科技支撑等问题,认为中国“双碳”行动的基本方略应该是坚持“一个基本理念”、实现“两个宏观目标”、贯彻“三路综合”与“四举并进”的技术路径、落实全域国土空间管控和产业协同发展的“五个统筹”宏观布局,强化气候变化、地球系统碳循环科学研究及脱碳、低碳产业技术变革。面向国家“双碳”行动的全球变化和生态经济学研究需要长期持续关注的核心科学问题,构建地球系统碳循环过程、碳储量及通量的多要素-多过程-多界面-多尺度协同监测体系,系统认知和精细评估中国区域生态系统碳汇功能及增汇潜力。当前的迫切任务是构建和完善科学基础、观测模拟、能源结构转型、产业结构调整、生态保碳增汇、国家战略与路径选择、协同治理与管理政策7个方面的科技支撑体系。

关键词：碳达峰碳中和行动方略气候治理减排增汇生态系统碳循环

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

统筹草地生态系统五库功能构建国家生态安全屏障

引用

中国科学基金 2023年第4期37卷 603-612页

作者：郝天象杨萌于贵瑞中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室北京100101 中国科学院大学资源与环境学院北京100049

草地生态系统是我国生态文明建设的重要载体,对国家生态安全具有基础性、战略性作用。如何落实草地生态系统的多功能近自然经营管理,是草地资源高质量发展亟待解决的问题。本文立足国家生态安全屏障建设,阐述了我国草地资源现状、保护... 详细信息

草地生态系统是我国生态文明建设的重要载体,对国家生态安全具有基础性、战略性作用。如何落实草地生态系统的多功能近自然经营管理,是草地资源高质量发展亟待解决的问题。本文立足国家生态安全屏障建设,阐述了我国草地资源现状、保护修复成效与关键科技问题,提出“统筹草地生态系统五库功能,筑牢国家生态安全屏障”的草地转型发展新战略、实现路径与研究建议,以期助力草地资源高质量发展和国家生态安全屏障构建。

关键词：草地生态系统五库统筹生态资产经营管理生态安全

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

基于荷包缝合腹腔镜NOSES在乙状结肠癌及上段直肠癌治疗中的应用价值

引用

中华消化外科杂志 2024年第6期23卷 853-858页

作者：魏哲威刘宝忆周皓雷天翔孙开宇宋武中山大学附属第一医院胃肠外科中心广州510080

目的探讨基于荷包缝合腹腔镜经自然腔道取标本手术(NOSES)在乙状结肠癌及上段直肠癌治疗中的应用价值.方法采用回顾性描述性研究方法.收集2022年10月至2023年6月中山大学附属第一医院收治的14例行基于荷包缝合腹腔镜NOSES乙状结肠癌及... 详细信息

目的探讨基于荷包缝合腹腔镜经自然腔道取标本手术(NOSES)在乙状结肠癌及上段直肠癌治疗中的应用价值.方法采用回顾性描述性研究方法.收集2022年10月至2023年6月中山大学附属第一医院收治的14例行基于荷包缝合腹腔镜NOSES乙状结肠癌及上段直肠癌根治术患者的临床病理资料;男8例,女6例;年龄为(56±10)岁.观察指标:(1)手术情况.(2)术后情况.(3)随访情况.正态分布的计量资料以(x)±s表示.计数资料以绝对数表示.结果(1)手术情况.所有患者顺利行基于荷包缝合腹腔镜NOSES乙状结肠癌及上段直肠癌根治术,无中转开放手术.14例患者手术时间为(162±32)min,术中出血量为(22±12)mL.(2)术后情况.14例患者术后首次下床活动时间为(1.6±0.7)d,术后首次肛门排气时间为(2.1±0.6)d,术后首次饮水时间为(2.4±0.6)d,术后首次进食流质食物时间为(3.8±1.0)d,术后住院时间为(6.0±0.9)d.所有患者术后未发生吻合口漏、出血等围手术期并发症.(3)随访情况.14例患者均获得随访,随访时间为(9.7±1.9)个月.14例患者术后无复发、转移和死亡.结论基于荷包缝合腹腔镜NOSES用于治疗乙状结肠癌及上段直肠癌安全、可行.

关键词：结直肠肿瘤乙状结肠上段直肠经自然腔道取标本荷包缝合疗效安全性腹腔镜检查

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

全面提升我国森林生态系统质量和稳定性的实践与思考

引用

陆地生态系统与保护学报 2022年第5期2卷 13-31页

作者：郝天象王兵牛香刘世荣于贵瑞中科院地理科学与资源研究所中国科学院生态系统网络观测与模拟重点实验室北京100101 中国林业科学研究院森林生态环境与自然保护研究所国家林业和草原局森林生态环境重点实验室北京100091

森林生态系统为人类生存发展提供必需基础物资,对社会经济系统蓬勃发展和地球系统永续发展具有重要支撑与调控作用。因地制宜、稳中求进地提升森林生态系统质量及其稳定性,充分发挥森林的“五库”(水库、粮库、钱库、碳库、种库)价值,... 详细信息

森林生态系统为人类生存发展提供必需基础物资,对社会经济系统蓬勃发展和地球系统永续发展具有重要支撑与调控作用。因地制宜、稳中求进地提升森林生态系统质量及其稳定性,充分发挥森林的“五库”(水库、粮库、钱库、碳库、种库)价值,是国家战略布局、社会经济高质量发展的迫切需求,也是统筹推进生态文明建设、促进人与自然和谐共生、落实生态恢复和环境治理、以及实现“双碳”战略目标的有力抓手。然而,在我国加强生态文明建设,建成“美丽中国”的宏伟目标下,如何全面提升中国森林生态系统质量和稳定性,仍缺乏系统、科学的理论依据和对策方案。基于中国生态系统研究网络(CERN)和中国森林生态系统定位研究网络(CFERN)的长期观测实验研究,开展了我国森林生态系统质量和稳定性的系统评估。基于这项研究,本文分析了我国森林生态系统质量面临的问题与政策建议,阐述了新时期我国森林生态系统质量提升的任务与宏观战略,并对重点林区存在的突出区域特色问题进行论述并提出经营建议,可为完善新时期森林生态系统经营体系、解决现存的一系列经营问题、提升森林生态系统质量和稳定性提供科技支撑。

关键词：生态文明建设森林生态系统质量林业发展

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：