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Biocrust-induced partitioning of soil water between grass and shrub in a desert steppe of Northwest China

Journal of Arid Land 2023年第1期15卷 63-76页

作者： YANG Xinguo WANG Entian qu wenjie WANG Lei Northwest National Key Laboratory Breeding Base for Land Degradation and Ecological Restoration Ningxia UniversityYinchuan 750021China Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems Ministry of EducationNingxia UniversityYinchuan 750021China Ecology and Environment College Ningxia UniversityYinchuan 750021China

Maintaining the stability of exotic sand-binding shrub has become a large challenge in arid and semi-arid grassland ecosystems in northern *** investigated two kinds of shrublands with different BSCs(biological soil crusts)cover in desert steppe in Northwest China to characterize the water sources of shrub(Caragana intermedia Kuang et ***)and grass(Artemisia scoparia *** Kit.)by stable 18O *** results showed that both shrublands were subject to persistent soil water deficiency from 2012 to 2017,the minimum soil depth with CV(coefficient of variation)<15% and SWC(soil water content)<6% was 1.4 m in shrubland with open areas lacking obvious BSC cover,and 0.8 m in shrubland covered by mature *** ***,a considerable proportion of water sources pointed to the surface *** from BSCs contributed to averages 22.9%and 17.6%of the total for *** and ***,*** might use more water from BSCs in rainy season than dry season,in contrast to *** relationship between shrub(or grass)and soil water by δ^(18)O shown significant differences in months,which partly verified the potential trends and relations covered by the high variability of the water source at seasonal *** fine roots at 0-5 cm soil layer could be found in the surface soil layer covered by BSCs(8000 cm/m^(3))than without BSCs(3200 cm/m^(3)),which ensured the possibility of using the surface soil water by *** result implies that even under serious soil water deficiency,*** can use the surface soil water,leading to the coexistence between *** and *** with the result from BSCs in desert areas,the natural withdrawal of artificial *** from desert steppe will be a long-term process,and the highly competitive relationship between shrubs and grasses also determines that its habitat will be maintained in serious drought state for a long time.

关键词： desert steppe biological soil crusts water resource Caragana intermedia Artemisia scoparia

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Effects of wind speed,underlying surface,and seed morphological traits on the secondary seed dispersal in the Tengger Desert,China

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Journal of Arid Land 2024年第4期16卷 531-549页

作者： qu wenjie ZHAO Wenzhi YANG Xinguo WANG Lei ZHANG Xue qu Jianjun Northwest Institute of Eco-Environment and Resources Chinese Academy of SciencesLanzhou 730000China Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems in Northwestern China of Ministry of Education Ningxia UniversityYinchuan 750021China University of Chinese Academy of Sciences Beijing 100049China School of Ecology and Environment Ningxia UniversityYinchuan 750021China

The maintenance of sand-fixing vegetation is important for the stability of artificial sand-fixing systems in which seed dispersal plays a key *** on field wind tunnel experiments using 11 common plant species on the southeastern edge of the Tengger Desert,China,we studied the secondary seed dispersal in the fixed and semi-fixed sand dunes as well as in the mobile dunes in order to understand the limitations of vegetation regeneration and the maintenance of its *** results indicated that there were significant variations among the selected 11 plant species in the threshold of wind speed(TWS).The TWS of Caragana korshinskii was the highest among the 11 plant species,whereas that of Echinops gmelinii was the *** morphological traits and underlying surface could generally explain the *** the secondary seed dispersal processes,the proportions of seeds that did not disperse(no dispersal)and only dispersed over short distance(short-distance dispersal within the wind tunnel test section)were significantly higher than those of seeds that were buried(including lost seeds)and dispersed over long distance(long-distance dispersal beyond the wind tunnel test section).Compared with other habitats,the mobile dunes were the most difficult places for secondary seed *** seeds were the easiest to be found in the semi-fixed sand dunes,whereas fixed sand dunes were the best sites for seeds that dispersed over long *** results of linear mixed models showed that after controlling the dispersal distance,smaller and rounder seeds dispersed *** index and wind speed were the two significant influencing factors on the burial of *** explanatory power of wind speed,underlying surface,and seed morphological traits on the seeds that did not disperse and dispersed over short distance was far greater than that on the seeds that were buried and dispersed over long distance,implying that the processes and mechanisms of burial and lo

关键词： seed dispersal seed morphological traits wind speed vegetation regeneration wind tunnel Tengger Desert

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Organosilicon-group-derived silica-ionogel electrolyte for lithium ion batteries

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Rare Metals 2018年第6期37卷 504-509页

作者： YueJiao Li Cui Guo LuShan Yue wenjie qu Nan Chen YuJuan Dai RenJie Chen Feng Wu School of Material Science and Engineering Beijjing Institute of Technology Beijing 100081 China Collaborative Innovation Center of Electric Vehicles in Beijing Beijing 100081 China Beijing Jinghua Eduction School Beijing 100081 China

In order to avoid leakage problem caused by liquid electrolyte, a new ionogel electrolyte was developed by in situ immobilizing organosilicon-functionalized ionic liquid within a nanoporous silica matrix. The ionic liquid evenly coats on the surface of porous silica and fills in the silica framework pores with no strong chemical interaction. The ionogel electrolyte has the dual advantages of a silica solid support and a wide electrochemical stability window of ionic liquid （4.87 V vs. Li^＋/Li）. The half-cells assembled with this electrolyte and LiFePO4 electrode have excellent performance at room temperature and 60 ℃. The Li/SiO2-IGE/LiFePO4 cell displays a discharge capacity of 129.1 mAh·g^-1 after 200 charge/discharge cycles at room temperature.

关键词： Ionogel electrolyte SiO2 Organosilicon group Ionic liquid

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Enhancing the peroxidase-like activity of MoS_(2)-based nanozymes by introducing attapulgite for antibacterial application and sensitive detection of glutathione

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Nano Research 2024年第8期17卷 7415-7426页

作者： Feng Feng Yihe Zhang Xiao Zhang Bin Mu Jiahe Zhang wenjie qu Wangshu Tong Minmin Liang Qi An Zhanjun Guo Lu Zhao Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources Beijing Key Laboratory of Materials Utilization of Nonmetallic Minerals and Solid WastesNational Laboratory of Mineral MaterialsSchool of Materials Science and TechnologyChina University of Geosciences(Beijing)Beijing 100083China Key Laboratory of Clay Mineral Applied Research of Gansu Province Lanzhou Institute of Chemical PhysicsChinese Academy of SciencesLanzhou 730000China Experimental Center of Advanced Materials School of Materials Science and Engineering School of Materials Science and EngineeringBeijing Institute of TechnologyBeijing 100081China

Nanozymes are next-generation of nanomaterials with enzyme-like *** particular,nanozymes with peroxidase(POD)-like activity have been utilized in various fields,including antibacterial,detection,degradation,***,their extensive applications were limited by their low catalytic activity ***,we have presented a composite nanozyme based on attapulgite(ATP)(Fe-ATP-MoS_(2)(FAM)),which exhibited enhanced POD-like activity(185.33 U·mg^(−1)),4.25 times higher than that of Fe-MoS_(2)(FM)(43.63 U·mg^(−1)).The density functional theory(DFT)calculations indicated that the addition of ATP increased the electron density of metal centers(Mo and Fe).More importantly,Michaelis–Menten kinetics revealed that the introduction of ATP significantly enhanced the binding affinities of substrates through the pores of ATP,forming a highly concentrated substrate microenvironment and thus promoting its POD-like ***,from molecular size and kinetic analysis,we proposed that the changes in substrate size before and after oxidation also significantly affected its Michaelis-constant(Km)***,we utilized FAM in the applications of highly effective antibacterial application and sensitive detection of glutathione(GSH).In conclusion,this work provides a novel approach for designing a highly efficient nanozyme based on natural mineral composites.

关键词： attapulgite peroxidase electron density affinity antibacterial

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Spatiotemporal characteristics of seed rain and soil seed bank of artificial Caragana korshinskii Kom. forest in the Tengger Desert, China

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Journal of Arid Land 2024年第4期16卷 550-566页

作者： SHEN Jianxiang WANG Xin WANG Lei WANG Jiahui qu wenjie ZHANG Xue CHANG Xuanxuan YANG Xinguo CHEN Lin QIN Weichun ZHANG Bo NIU Jinshuai College of Ecological Environment Ningxia UniversityYinchuan 750021China Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems in Northwest China Ministry of EducationNingxia UniversityYinchuan 750021China College of Agriculture Ningxia UniversityYinchuan 750021China

Vegetation restoration and reconstruction are effective approaches to desertification control and achieving social and economic sustainability in desert ***,the self-succession ability of native plants during the later periods of vegetation restoration remains ***,this study was conducted to bridge the knowledge gap by investigating the regeneration dynamics of artificial forest under natural *** information of seed rain and soil seed bank was collected and quantified from an artificial Caragana korshinskii *** in the Tengger Desert,*** germination tests were conducted in a laboratory *** analysis of species quantity and diversity in seed rain and soil seed bank was conducted to assess the impact of different durations of sand fixation(60,40,and 20 a)on the progress of vegetation restoration and ecological conditions in artificial *** *** results showed that the top three dominant plant species in seed rain were Echinops gmelinii Turcz.,Eragrostis minor Host.,and Agropyron mongolicum Keng.,and the top three dominant plant species in soil seed bank were ***,Chloris virgata Sw.,and *** restoration period increased,the density of seed rain and soil seed bank increased first and then *** for species richness,as restoration period increased,it gradually increased in seed rain but decreased in soil seed *** was a positive correlation between seed rain density and soil seed bank density among all the three restoration *** species similarity between seed rain or soil seed bank and aboveground vegetation decreased with the extension of restoration *** shape of the seeds,specifically those with external appendages such as spines and crown hair,clearly had an effect on their dispersal,then resulting in lower seed density in soil seed *** addition,precipitation was a crucial factor in promoting rapid germination,also resulting in lower seed density in soi

关键词： ecological restoration soil seed bank seed rain artificial forest vegetation desertification Caragana korshinskii Tengger Desert

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Current understanding,challenges and promise facing novel solid-state electrolytes

Current understanding,challenges and promise facing novel so...

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中国化学会第三届中国能源材料化学研讨会

作者： wenjie qu Nan Chen Feng Wu Renjie Chen School of Material Science & Engineering Beijing Institute of Technology Collaborative Innovation Center of Electric Vehicles in Beijing

＜正＞Introduction Solid-state electrolytes could eliminate most of the safety concerns encountered with liquid electrolytes because of their intrinsic solid *** main advantages of solid-state electrolytes are that th...

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3 - 48 Study of M1 Mutagenic Effects of Carbon Ion Irradiation on Lavender Seeds

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IMP & HIRFL Annual Report 2012年第1期 142-143页

作者： Liu Ruiyuan Dong Xicun Li Wenjian Du Yan qu Ying Jin wenjie

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TRH评估优化分析

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中国新通信 2010年第15期12卷 64-66页

作者：屈文杰中国移动通信集团河北有限公司廊坊分公司

本文从爱立信BSC网络设备维护工作中的实际情况出发,重点阐述了日常维护中使用RAHII对爱立信BSC TRH设备进行TRH负荷重分配的原理和方法。

关键词： TRH 负荷优化

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优化课堂教学模式,提高学生自主学习能力——一次高级英语课堂教学改革的实验

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西安外国语学院学报 2005年第3期13卷 63-65页

作者：曲文婕西安外国语学院继续教育学院陕西西安710061

教育部根据我国改革开放和现代化建设的需要,对我国高校外语专业的教育改革提出了复合型培养模式的发展战略和方向。高校的教改实践在教材上实现了很大的突破,而占主导地位的课堂教学所存在的缺陷却日益凸现。笔者以英语专业高级英语课... 详细信息

教育部根据我国改革开放和现代化建设的需要,对我国高校外语专业的教育改革提出了复合型培养模式的发展战略和方向。高校的教改实践在教材上实现了很大的突破,而占主导地位的课堂教学所存在的缺陷却日益凸现。笔者以英语专业高级英语课程课堂教学改革为突破口,通过优化课堂教学模式,探讨课堂教学为自主学习服务的现实方法。实验结果表明:新的教学模式能够调动学生积极情感因素,培养学习策略,促进学生自主学习能力。

关键词：高级英语教学改革实验课堂教学模式学生自主学习能力培养

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浅谈碳计量对于实现“双碳”目标的重要作用

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计量与测试技术 2023年第8期50卷 48-50页

作者：谢杰曲雯洁威凯检测技术有限公司

根据我国对低碳经济发展的要求,分析了我国为实现碳达峰与碳中和(简称“双碳”)目标的现状和存在的主要问题,从碳排放权交易(简称“碳交易”)、实现“双碳”目标和企业绿色发展的角度,总结了碳计量对于实现该任务的重要作用,并对如何推... 详细信息

根据我国对低碳经济发展的要求,分析了我国为实现碳达峰与碳中和(简称“双碳”)目标的现状和存在的主要问题,从碳排放权交易(简称“碳交易”)、实现“双碳”目标和企业绿色发展的角度,总结了碳计量对于实现该任务的重要作用,并对如何推进“双碳”标准计量体系的建设提出建议。

关键词：碳计量碳排放碳达峰碳中和低碳经济

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