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青海高寒地区6种多年生禾本科牧草产量及营养价值比较分析

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中国畜牧兽医 2024年第9期51卷 3794-3806页

作者：刘金平张楠楠赵鑫盛黄亚宇杨英魁周学丽钟荣珍赵国君拜彬强郝力壮青海大学青海省高原放牧家畜动物营养与饲料科学重点实验室西宁810016 法国农业科学研究院法国农业食品与环境研究院圣吉莱35590 青海省草原改良试验站共和813099 中国科学院东北地理与农业生态研究所吉林省饲料加工与草食家畜精准饲养跨区域科技创新中心吉林省草地畜牧重点实验室长春130102 海北州农牧产品质量安全检验检测中心海北812200

【目的】试验旨在对青海高寒地区人工栽培禾本科多年生牧草进行营养价值评价,以期为高原畜牧业的发展和家畜饲草需求提供参考。【方法】以高寒地区常见的冰草、黑麦草、小黑麦、麦宾草、冷地早熟禾和草地早熟禾为研究对象,选用3头成年... 详细信息

【目的】试验旨在对青海高寒地区人工栽培禾本科多年生牧草进行营养价值评价,以期为高原畜牧业的发展和家畜饲草需求提供参考。【方法】以高寒地区常见的冰草、黑麦草、小黑麦、麦宾草、冷地早熟禾和草地早熟禾为研究对象,选用3头成年公牦牛作为瘤胃液供体动物,通过体外产气法结合牧草产草量评定牧草的营养价值。【结果】①小黑麦的鲜草产量和干草产量均显著高于其他牧草(P<0.05)。小黑麦和麦宾草的干鲜比较低,显著低于其他牧草(P<0.05)。②小黑麦的干物质(DM)和粗蛋白质(CP)含量均显著高于冷地早熟禾和草地早熟禾(P<0.05)。草地早熟禾的粗灰分(Ash)、中性洗涤纤维(NDF)和酸性洗涤纤维(ADF)含量均最高。冰草的粗脂肪(EE)含量显著高于其他牧草(P<0.05)。小黑麦的钙(Ca)含量显著高于其他牧草(P<0.05),而磷(P)含量与冰草相同。③小黑麦在24、48和72 h的体外产气量(GP)均显著高于其他牧草(P<0.05),且随时间的推移,各牧草间的产气量呈现上升趋势。④6种栽培牧草体外发酵液的pH范围为6.76~6.98。小黑麦和麦宾草的总挥发性脂肪酸(VFA)、乙酸和丙酸含量与其他牧草间差异显著(P<0.05),小黑麦的丁酸和戊酸含量最高,草地早熟禾的乙丙比显著高于其他牧草(P<0.05)。6种栽培牧草氨态氮(NH 3-N)浓度范围为84.70~112.60 mg/L。冷地早熟禾的体外干物质消化率(IVDMD)显著高于其他牧草(P<0.05)。⑤小黑麦各单位面积营养成分产量最高,均显著高于其他牧草(P<0.05)。【结论】小黑麦的综合生产性能最优,营养价值较高,可以作为青海高寒地区适宜栽培牧草。

关键词：高寒地区体外产气禾本科牧草产草量营养价值

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Much late onset of Quaternary glaciations on the Tibetan Plateau:determining the age of the Shishapangma Glaciation using cosmogenic 26Al and 10Be dating

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Science Bulletin 2018年第5期63卷 306-313页

作者： Yixin Chen yingkui Li Mei Zhang Zhijiu Cui Gengnian Liu College of Urban and Environmental Sciences Peking University Beijing 100871 China Department of Geography University of Tennessee Knoxville TN 37996 USA College of Urban and Environment Science Changchun Normal University Changchun 130032 China

The onset of Quaternary glaciations is a critical event in the climate and tectonic history of the Tibetan *** Shishapangma Glaciation,defined based on the till deposit from the northern slopes of ***,has been identified as the oldest glaciation on the Tibetan ***,the timing of this glaciation has not been *** measured^(10)Be and^(26)Al concentrations of a set of boulders on top of this till and simulated their complex exposure-burial *** simulated results indicate that the formation age of this till is likely around 835.2±241.0 ka,representing the minimum timing of glacial onset on the Tibetan *** Shishapangma Glaciation is apparently much younger than the glacial onset in many other areas of the world,such as Europe and North America,and was likely driven by the coupled effect between tectonic uplift and climate cooling during the early–middle Pleistocene transition.

关键词： Glacial onset Tibetan Plateau Quaternary glaciations Cosmogenic nuclides Exposure-burial history simulation

Long-term hydrological impacts of land use/land cover change from 1984 to 2010 in the Little River Watershed,Tennessee

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International Soil and Water Conservation Research 2014年第2期2卷 11-21页

作者： Chunhao Zhu yingkui Li Department of Geography University of TennesseeKnoxvilleTN 37996USA

Assessing long-term hydrological impacts of land use/land cover(LULC)change is of critical importance for land use planning and water resource *** Little River Watershed,Tennessee,is an important watershed supporting drinking water and recreational activities within and around the Great Smoky Mountains National Park in the Unites ***,the potential hydrological impacts of LULC change,especially urbanization in recent decades,are not *** paper assessed the long-term impacts of LULC change on streamflow and non-point source pollution using the Soil and Water Assessment Tool(SWAT)and a detailed LULC record from 1984 to *** SWAT was first calibrated and validated using observed streamflowin 2010 and then simulated using different LULC patterns in 1984-2010 to quantify the long-term hydrological impacts caused by the LULC *** results indicated a minor 3%increase in streamflow for the whole watershed from 1984 to 2010,but with a distinct spatial *** increase in streamflow is closely related to urban *** no streamflow increase occurred in the upper watershed within the national park,whereas>10%increase occurred in the lower watershed,especially in areas close to *** simulation also suggested 34.6%reduction in sediment and about 10%reduction in nutrient loads from 1984 to 2010,closely related to the decrease in agricultural ***,without calibration and validation,the simulated reduction in the sediment and nutrient loads may be problematic because SWAT mainly simulates the static LULC patterns,whereas LULC transitions,such as construction phases,may generate more sediment and nutrient *** addition,the simulation also did not account for the sediment and nutrients generated from stream bank erosion.

关键词： Land use/land cover change Little River Watershed Long-term hydrological impacts SWAT

X-band AlGaN/GaN HEMTs with high microwave power performance

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Science China(Physics,Mechanics & Astronomy) 2011年第3期54卷 442-445页

作者： PENG MingZeng ZHENG yingkui WEI Ke CHEN XiaoJuan LIU XinYu Key Laboratory of Microelectronics Devices & Integrated Technology Institute of Microelectronics Chinese Academy of Sciences Beijing 100029 China

An X-band AlGaN/GaN high-electron-mobility transistor (HEMT) on SiC substrate with high microwave power performances has been achieved. Its small-signal characteristics with a gate-length of 0.4 μm showed a unity current gain cut-off frequency (fT) of 22 GHz and a maximum oscillation frequency (fmax) of 65 GHz. The GaN HEMT device with a gate width of 1 mm exhibited a continuous-wave saturated output power of 10.2 W and a linear gain of 14.8 dB at 8 GHz, and successfully achieved the power-added efficiency (PAE) as high as 69.2%, which is very suitable for X-band power applications.

关键词： GaN high-electron-mobility transistor X-band power-added efficiency

RPA3 is transcriptionally activated by YY1 and its depletion enhances radiosensitivity of triple-negative and HER2-positive breast cancer

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BIOCELL 2021年第3期45卷 685-694页

作者： YANFEI LI LULU DAI KE CAI yingkui SONG XIQING LIU Clinical Laboratory Laiyang Central Hospital of YantaiLaiyang265200China Department of General Surgery The Eighth People’s Hospital of QindaoQingdao266000China Hepatobiliary Surgery Anqiu People’s HospitalAnqiu262100China

RPA3(Replication Protein A3)(14 kD)is a part of the canonical heterotrimeric replication protein A complex(RPA/RP-A).This study aimed to explore the functional role of RPA3 and the mechanisms of its dysregulation in breast *** from the Cancer Genome Atlas(TCGA)-breast cancer patients and GSE75688 were utilized for gene expression and survival *** cancer cell lines MDA-MB-231 and SK-BR-3 were used for in-vitro cell *** assay and immunofluorescent staining ofγ-H2AX were performed to examine radiation-induced *** correlation analysis was performed to identify potential transcription factors(TFs)regulating RPA3 ***-qPCR and dual-luciferase assay were conducted to verify the transcriptional activating effect of YY1 on RPA3 *** analysis showed that RPA3 expression was upregulated in breast *** upregulation was associated with poor survival of basal-like and HER2+***3 inhibition by siRNA reduced colony formation and increasedγ-H2AX foci formation after irradiation in MDA-MB-231 and SK-BR-3 ***3 expression was transcriptionally activated by YY1 via promoter binding in the two cell *** RPA3 and YY1 expression were positively correlated with their gene-level copy ***3 might serve as a potential target for radio-sensitization in basal-like and HER2+breast cancer.

关键词： RPA3 YY1 Breast cancer Radiotherapy

Degradation Reliability Analysis Based on TOPSIS Model Selection Method

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Journal of Shanghai Jiaotong university(Science) 2019年第3期24卷 351-356页

作者： GU yingkui SHEN Yanjun YU Dongping School of Mechanical and Electrical Engineering Jiangxi University of Science and Technology

It is necessary to determine the degradation path model of products at first when using the method based on degradation path model to evaluate the degradation reliability of *** present,the degradation path model is mainly determined by scatter plots of degradation ***,this method has strong subjectivity and is liable to cause the evaluation results to be inconsistent with the actual *** this paper,a degradation reliability analysis method based on TOPSIS(technique for order preference by similarity to an ideal solution)model selection is proposed,and its implementation process is *** optimal degradation path model is selected according to the calculated *** the help of TOPSIS method,various degradation path models can be selected and quantified,and the original degradation path method can be improved to avoid the risk of errors in product reliability evaluation caused by inaccurate subjective hypo thesis,so as to ensure the objectivity and accuracy in the process of model *** validity and practicability of the proposed met hod are verified by the degradation analysis of the injector of a certain type of diesel engine.

关键词： performance degradation degradation path least squares estimation technique for order preference by similarity to an ideal solution(TOPSIS) reliability

Evaluating the Provenance of Metasedimentary Rocks of the Jiangxian Group from the Zhongtiao Mountain Using Whole-Rock Geochemistry and Detrital Zircon Hf Isotope

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Acta Geologica Sinica(English Edition) 2009年第3期83卷 550-561页

作者： LI Qiugen CHEN Xu LIU Shuwen WANG Zongqi ZHOU yingkui ZHANG Jian WANG Tao The Key Laboratory of Orogenic Belts and Crustal Evolution MOE School of Earth and Space Sciences Peking University Beijing 100871 China Institute of Geology Chinese Academy of Geological Sciences Beijing 100037 China Jinzhuang Production and Construction Coal Mine of Zaozhuang City Tengzhou 277522 Department of Earth Sciences University of Waterloo Waterloo Ontario Canada

In this study, whole-rock geochemical and Nd isotopic data, as well as detrital zircon Hf isotopes of Palaeoproterozoic metasedimentary rocks from the Jiangxian Group are presented to evaluate the characteristics of their provenance and the tectonic history. The major and trace element compositions are comparable to Post-Archean upper continental crust （PA-UCC）, but have slight enrichment in the LILE, with the exception of Cs and Sr, and a slight depletion in ferromagnesian elements, HFS elements, such as Nb and Ta, and some major elements, such as CaP and Na2O. The geochemical data reveal that the collected metasedimentary rocks have experienced intermediate source weathering with chemical index of alteration values ranging from 72 to 78, varying degrees of K- metasomatism, and post-depositional loss of Na, as well as negligible sorting, and are derived from the weathering of mostly felsic and non-mafic rocks. The selected Lu-Hf isotopic analysis on detrital zircon points to both the Trans-North China Orogen and Eastern Block of the north China craton as the most likely sources for the metasedimentary rocks of the Jiangxian Group. However, a contribution of detritus from the Western Block of the north China craton can be ruled out. The sediments were probably deposited in a back-arc basin within an active continental margin setting.

关键词： Paleoproterozoic metasediment geochemistry provenance tectonic setting JiangxianGroup north China craton

The origin of ferroan and magnesian anorthosites in the lunar crust

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Acta Geologica Sinica(English Edition) 2017年第S1期91卷 277-278页

作者： Zhu Dan Zhang Mingming Xu yingkui State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Lunar and Planetary Science Research Center Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China

1 Introduction The widely accepted standard model for the lunar feldspathic crust is:the early Moon was wholly or mostly molten,forming Lunar Magma Ocean(LMO).Olivine and pyroxene crystallized first from that magma oc... 详细信息

关键词： The origin of ferroan and magnesian anorthosites in the lunar crust

The effect of grid size on the quantification of erosion,deposition,and rill network

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International Soil and Water Conservation Research 2017年第3期5卷 241-251页

作者： Xiaoyu Lu yingkui Li Robert A.Washington-Allen Yanan Li Haidong Li Qingwu Hu University of Tennessee Department of Geography1000 Phillip Fulmer WayKnoxvilleTN 37996USA South Dakota State University Department of Geography1021 Medary AveBrookingsSD 57007USA Nanjing Institute of Environmental Sciences Ministry of Environmental ProtectionNanjing 210042China School of Remote Sensing and Information Engineering Wuhan UniversityWuhan 430079China

Hillslope rill/interrill erosion has been investigated from the perspective of runoff transport of *** advances in terrestrial laser scanning can provide high-resolution elevation data up to centimeter levels,and temporal digital elevation models(DEMs)enabled the detection and quantification of sediment *** and deposition are spatially heterogeneous across hillslopes,and the choice of resolution is critical when using a DEM to study the spatial pattern of the *** study investigates the influence of grid size on the sediment change calculation and rill network delineation based on two surveys using a terrestrial laser scanner on a hillslope with well-developed rills in 2014 and *** DEMs were used to quantify elevation changes and used to delineate rill *** produced DEM pairs of incremental grid sizes(1-cm,2-cm,5-cm,8-cm,10-cm,15-cm,20-cm,and 30-cm)for DEM difference and rill network *** used the 1-cm DEM as the reference to compare the results produced from other *** results suggest that erosion mainly occurs on the rill sidewalls,and deposition on the rill floors,with patches of erosion/deposition within the interrill *** the area and volume of detectable change decrease as the grid size increases,while the area and volume of erosion are less sensitive compared to those of *** total length and number of rills decrease with the increased grid size,whereas the average length of rills *** mean offset between delineated rill network and the reference increases with larger grid *** contrast to the erosion and deposition detected within rills,minor changes are detected on the interrill areas,indicating that either no topographic changes occurred or the changes were too small to be detected on the interill areas by our finest 1-cm *** recommend to use the finest possible grid size that can be achieved for future studies.

关键词： GIS Terrestrial laser scanning Constant drop theory DEM of difference Resolution