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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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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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思想政治教育视角下高校校园公益广告的价值与应用路径探究

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高教论坛 2024年第1期 76-79页

作者：曲文杰董振娟中国海洋大学山东青岛266100

在学科高度整合、社会需求多元化和高等教育功能综合化的背景下,思想政治教育与高校校园公益广告的融合对思想政治教育的传播有重要价值.高校校园公益广告与思想政治教育在价值取向、基本内容及实践开展过程等方面有相同点,加之高校校... 详细信息

在学科高度整合、社会需求多元化和高等教育功能综合化的背景下,思想政治教育与高校校园公益广告的融合对思想政治教育的传播有重要价值.高校校园公益广告与思想政治教育在价值取向、基本内容及实践开展过程等方面有相同点,加之高校校园公益广告的特殊性,凸显了其在培育和践行社会主义核心价值观、弘扬中华优秀传统文化以及展现中国精神等方面的重要思想政治教育价值.因此,为充分发挥高校校园公益广告的思想政治教育价值,高校需从加强传播者队伍建设、发挥受众主动性、创新高校校园公益广告内容、优化传播媒介以及完善传播效果监测等五方面入手拓宽校园公益广告的应用路径.

关键词：思想政治教育传播高校校园公益广告价值

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

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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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腾格里沙漠东南缘猪毛菜(Salsola collina)根系构型特征比较

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中国沙漠 2024年第4期44卷 193-201页

作者：楼科尔曲文杰王磊王兴郜永贵杨新国宁夏大学西北退化生态系统恢复与重建教育部重点实验室/西北土地退化与生态恢复国家重点实验室培育基地/生态环境学院宁夏银川750021 中国铁路兰州局集团有限公司中卫工务段中卫固沙林场宁夏中卫755000

根系构型反映植物对资源的吸收能力和利用情况,可揭示沙地植被更新生长与适应机制。本研究以腾格里沙漠东南缘不同地表条件下[流沙地,藻结皮地(半固定沙地),藓结皮地(固定沙地)]的猪毛菜(Salsola collina)为研究对象,采用传统挖掘法收... 详细信息

根系构型反映植物对资源的吸收能力和利用情况,可揭示沙地植被更新生长与适应机制。本研究以腾格里沙漠东南缘不同地表条件下[流沙地,藻结皮地(半固定沙地),藓结皮地(固定沙地)]的猪毛菜(Salsola collina)为研究对象,采用传统挖掘法收集植物根系,基于量化的根系形态指标,利用几何拓扑学及分形理论分析了根系构型特征,探讨了地表演变对猪毛菜根系构型特征的影响及其适应机制。结果表明:从流沙地、藻结皮地到藓结皮地,猪毛菜根深宽比、根冠比、比根长和比表面积逐次显著降低,根系水平幅则显著增加;根系拓扑指数TI分别为0.8125(流沙地)、0.7107(藻结皮地)、0.6313(藓结皮地),根系结构趋向于从鱼尾形分支结构转变为叉状分支结构;根系分形维数显著提高,但根系分形丰度显著降低。总之,伴随沙地固定程度的增加以及地表结皮覆盖条件的演变,猪毛菜根系生长投入下降,空间拓展能力退化,同时根系的整体结构进一步复杂化,根系生长对策从数量型向质量型转变,资源利用对策向高竞争力方向转变。本研究可为荒漠地区植被恢复和物种选择、配置提供参考依据。

关键词：腾格里沙漠猪毛菜(Salsola collina) 根系构型拓扑指数分形维数

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基于语义信息和彩色图像引导的道路场景深度补全框架

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测绘通报 2024年第S02期 191-196页

作者：耿信财施祥鹏黄书发屈文杰严璐李必军杜韵琦中铁七局集团武汉工程有限公司湖北武汉430200 武汉大学测绘遥感信息工程国家重点实验室湖北武汉430079

随着人工智能技术的发展,深度信息在机器人技术、无人驾驶和虚拟现实等领域的应用日益广泛。然而,现有深度传感器存在数据稀疏和受干扰等问题,生成的深度图限制了其在实际任务中的应用。于是,近年来提出由图像引导的深度补全任务,从稀... 详细信息

随着人工智能技术的发展,深度信息在机器人技术、无人驾驶和虚拟现实等领域的应用日益广泛。然而,现有深度传感器存在数据稀疏和受干扰等问题,生成的深度图限制了其在实际任务中的应用。于是,近年来提出由图像引导的深度补全任务,从稀疏深度图和高质量彩色图像生成密集深度图。在这项任务中,如何融合图像的语义信息和稀疏深度对性能起着重要作用。本文提出了一种将语义信息引入双分支网络中的深度补全框架,以促进语义信息与深度信息的融合,从而提高补全效果。试验结果表明,在加入了语义信息后,本文框架在道路场景数据集上表现优异,验证了其合理性和性能优势。

关键词：卷积神经网络深度学习深度图像深度图像补全语义信息

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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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Significant genomic introgression from grey junglefowl(Gallus sonneratii)to domestic chickens(Gallus gallus domesticus)

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Journal of Animal Science and Biotechnology 2024年第4期15卷 1482-1493页

作者： Xiurong Zhao Junhui Wen Xinye Zhang Jinxin Zhang Tao Zhu Huie Wang Weifang Yang Guomin Cao wenjie Xiong Yong Liu Changqing qu Zhonghua Ning Lujiang qu National Engineering Laboratory for Animal Breeding College of Animal Science and TechnologyChina Agricultural UniversityBeijing 100193China Key Laboratory of Protection and Utilization of Biological Resources in Tarim Basin Xinjiang Production and Construction CorpsTarim UniversityAlar 843300China Beijing Municipal General Station of Animal Science Beijing 100107China Animal husbandry station of Fangchenggang FangchenggangGuangxi Province 538001China Animal Disease Prevention and Control Center of Fangchenggang FangchenggangGuangxi Province 538001China Beijing Agricultural Effect Poultry Industry Co. Ltd.Beijing 101100China Engineering Technology Research Center of Anti‑aging Chinese Herbal Medicine of Anhui Province Fuyang Normal UniversityFuyangAnhui 236037China

Background Chicken is one of the most numerous and widely distributed species around the world,and many studies support the multiple ancestral origins of domestic *** research regarding the yellow skin phenotype in domestic chickens(regulated by BCO2)likely originating from the grey junglefowl serves as crucial evidence for demonstrating the multiple origins of ***,beyond the BCO2 gene region,much remains unknown about the introgression from the grey junglefowl into domestic ***,in this study,based on wholegenome data of 149 samples including 4 species of wild junglefowls and 13 local domestic chicken breeds,we explored the introgression events from the grey junglefowl to domestic *** We successfully detected introgression regions besides BCO2,including two associated with growth trait(IGFBP2 and TKT),one associated with angiogenesis(TIMP3)and two members of the heat shock protein family(HSPB2 and CRYAB).Our findings suggest that the introgression from the grey junglefowl may impact the growth performance of ***,we revealed introgression events from grey junglefowl at the BCO2 region in multiple domestic chicken breeds,indicating a phenomenon where the yellow skin phenotype likely underwent strong selection and was ***,our haplotype analysis shed light on BCO2 introgression event from different sources of grey junglefowl into domestic chickens,possibly suggesting multiple genetic flows between the grey junglefowl and domestic *** In summary,our findings provide evidences of the grey junglefowl contributing to the genetic diversity of domestic chickens,laying the foundation for a deeper understanding of the genetic composition within domestic chickens,and offering new perspectives on the impact of introgression on domestic chickens.

关键词： BCO2 Domestic chickens Grey junglefowl Introgression

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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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