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泰安市茶园施肥状况调查与分析

落叶果树 2023年第3期55卷 39-44页

作者：尤昕涵鹿英张丽霞董利红黄晓琴韩晓阳山东农业大学园艺科学与工程学院山东泰安271018 肥城市科技创新研究中心山东肥城271600 肥城市湖屯镇人民政府山东肥城271600

针对泰安市茶区存在产量偏低、低产茶园偏多问题,采用问卷调查形式进行了泰安市茶主产区施肥情况调查。结果表明,在回收的84户茶企、茶农问卷中,大多以小面积茶园经营为主;鲜叶采摘以1芽1叶和1芽2叶为主;施肥种类主要是复合肥料、商品... 详细信息

针对泰安市茶区存在产量偏低、低产茶园偏多问题,采用问卷调查形式进行了泰安市茶主产区施肥情况调查。结果表明,在回收的84户茶企、茶农问卷中,大多以小面积茶园经营为主;鲜叶采摘以1芽1叶和1芽2叶为主;施肥种类主要是复合肥料、商品有机肥料、尿素;施肥模式大多为基肥+3次追肥和基肥+2次追肥,多以施用尿素+复合肥料+有机肥料为主;年施肥量多数茶园每公顷有机肥料少于3000kg,复合肥料750~1500kg,尿素300~600kg;选择肥料受到施肥习惯和周围农户、经销商推荐影响较大,购买肥料时受价格和往年施肥习惯影响;普遍存在有机肥料施用不足、氮肥过量、新型高效肥料偏少、肥料总投入偏少等问题。建议政府,非营利性社会组织及科研院所,茶企、茶农三方深度融合以解决施肥问题。

关键词：泰安市茶园施肥情况调查

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A hollow tubular NiCo layacknered double hydroxide@Ag nanowire structure for high-power-density flexible aqueous Ni//Zn battery

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Journal of Energy Chemistry 2022年第7期31卷 593-603,I0015页

作者： xiaoyang Xuan Min Qian Likun Pan Ting Lu Yang Gao Lu han Lijia Wan Yueping Niu Shangqing Gong School of Physics East China University of Science and TechnologyShanghai 200237China Shanghai Key Laboratory of Magnetic Resonance School of Physics and Electronic ScienceEast China Normal UniversityShanghai 200241China Key Laboratory for Ultrafine Materials of Ministry of Education Shanghai Engineering Research Center of Hierarchical NanomaterialsSchool of Materials Science and EngineeringEast China University of Science and TechnologyShanghai 200237China School of Mechanical and Power Engineering East China University of Science and TechnologyShanghai 200237China

Flexible aqueous Ni//Zn batteries have attracted much attention as promising candidates for energy storage in the field of flexible ***,the Ni-based cathodes still face the challenges of poor conductivity,confined charge/mass transfer,and *** this work,we designed a hollow tubular structure consisting of a conductive silver nanowire (Ag NW) wrapped by active Ni Co layered double hydroxide (LDH),for enhancing the electrical conductivity,improving the charge/mass transfer kinetics,and facilitating the ion *** optimizing the contents of Ni,Co and Ag NW,the Ni_(4)Co LDH@Ag_(1.5)NW composite shows a maximum specific capacity of 115.83 m Ah g^(-1)at 0.1 A g^(-1)measured in a two-electrode ***,the flexible aqueous Ni//Zn battery assembled by Ni_(4)Co LDH@Ag_(1.5)NW interwoven with multi-walled carbon nanotube cathode and Zn foil anode realizes a high power density of 160μW cm^(-2)at the energy density of 23.14μWh cm^(-2),which is superior compared with those of oxide/hydroxide based devices and even higher than those of many carbon-based supercapacitors,showing its promising potentials for flexible energy storage applications.

关键词： NiCo layered double hydroxide Silver nanowire Hollow tubular morphology Flexible Ni//Zn battery

Strong-field photoionization of intense laser fields by controlling optical singularities

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Science China(Physics,Mechanics & Astronomy) 2021年第7期64卷 91-97页

作者： Yiqi Fang Zhenning Guo Peipei Ge Xueyan Ma Meng han xiaoyang Yu Yongkai Deng Qihuang Gong Yunquan Liu State Key Laboratory for Mesoscopic Physics and Frontiers Science Center for Nano-optoelectronics School of PhysicsPeking UniversityBeijing100871China Collaborative Innovation Center of Quantum Matter Peking UniversityBeijing100871China Collaborative Innovation Center of Extreme Optics Shanxi UniversityTaiyuan030006China Peking University Yangtze Delta Institute of Optoelectronics Nantong226001China

The spatial features of a light field, such as in the form of the optical singularities, provide a new degree of freedom for the application of light fields in different areas of science and technology. However, although the exploration of structured light is growing rapidly, the investigation of strong-field photoionization using such light fields is noticeably lagging behind. Here, we present an experimental study that reveals the signatures of intense, structured light fields with controlled optical singularities in strong-field photoionization. The different types of optical singularities can be identified through photoionization observables,i.e., photoelectron momentum distributions(PMDs). By concurrently shifting the locations of the phase and polarization singularities, the focal electric field features can be designated, and subsequently, the photoionization appearances can be manipulated. In this process, the behaviors of the different intense optical singularities are clearly visualized by the PMDs. This work will advance both the strong-field science and singularity optics.

关键词： strong-field ionization optical singularity spin-orbit interaction

Engineering cobalt sulfide/oxide heterostructure with atomically mixed interfaces for synergistic electrocatalytic water splitting

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Nano Research 2022年第2期15卷 1246-1253页

作者： xiaoyang Wang Yu He Xiaopeng han Jun Zhao Lanlan Li Jinfeng Zhang Cheng Zhong Yida Deng Wenbin Hu School of Materials Science and Engineering Tianjin Key Laboratory of Composite and Functional MaterialsKey Laboratory of Advanced Ceramics and Machining Technology of Ministry of EducationTianjin UniversityTianjin 300072China School of Materials Science and Engineering Hebei University of TechnologyTianjin 300130China

It remains challenging to develop economical and bifunctional electrocatalysts toward oxygen/hydrogen evolution reactions(OER/HER).Herein,we construct Co_(9)S_(8) nanoflakes decorated Co_(3)O_(4) nanoarrays with enriched heterogeneous interface zones on Ni foam(Co_(9)S_(8)@CO_(3)O_(4)/NF)via a novel step-wise *** Co_(9)S_(8)@Co_(3)O_(4)/NF hybrid manifests excellent performance with low overpotentials of 130 mV for HER(10 mA·cm^(-2))and 331 mV for OER(100 mA·cm^(-2)),delivering a small voltage of 1.52 V for water splitting at 10 mA·cm^(-2) as well as outstanding catalytic durability,which surpasses precious metals and previously reported earth-abundant *** experimental and theoretical investigations demonstrate that the excellent performance is attributed to the followings:(i)Highly conductive Ni facilitates the efficient charge transfer;(ii)porous core-shell nanoarchitecture benefits the infiltration and transportation of gases/ions;(iii)heterogeneous interface zones synergistically lower the chemisorption energy of hydrogen/oxygen *** work will shed light on the controllable synthesis and engineering of heterostructure nanomaterials for clean energy storage and conversion technologies.

关键词： nanocomposite heterointerface electrocatalysis oxygen evolution reaction hydrogen evolution reaction

517份玉米种质容重与其他品质性状相关性分析及候选基因挖掘

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浙江农林大学学报 2024年第4期41卷 669-678页

作者：杨张钰陈小央李燕李欣泽白康杰骆遥赵光武施俊生韩庆辉浙江农林大学现代农学院浙江杭州311300 浙江省农业厅种子管理总站浙江杭州310000 义乌玉米科技小院浙江义乌322000

【目的】玉米Zea mays籽粒容重是国家玉米区试标准中品质性状的重要指标之一,是一个复杂的数量性状,目前其影响因素和调控机制尚未完全解析。淀粉、蛋白质、脂肪等品质性状是影响容重的重要因素,但其与容重的关系仍存在争议。本研究旨... 详细信息

【目的】玉米Zea mays籽粒容重是国家玉米区试标准中品质性状的重要指标之一,是一个复杂的数量性状,目前其影响因素和调控机制尚未完全解析。淀粉、蛋白质、脂肪等品质性状是影响容重的重要因素,但其与容重的关系仍存在争议。本研究旨在阐明容重与其他品质性状之间的相关性,揭示容重的调控机制。【方法】测定以浙江省地方玉米种质资源为主要构成的517份玉米种质的容重,粗淀粉、粗蛋白、粗脂肪、直链淀粉质量分数等性状,并进行相关性分析。在此基础上,选取4个高容重、高淀粉质量分数、低粗蛋白质量分数、低脂肪质量分数的玉米种质籽粒和4个低容重、低淀粉质量分数、高粗蛋白质量分数、高脂肪质量分数的玉米种质籽粒进行转录组测序(RNA-Seq)分析。【结果】容重与总淀粉质量分数呈显著正相关(P<0.01),而容重与粗蛋白和粗脂肪质量分数呈显著负相关(P<0.01)。对极端种质进行RNA-Seq分析,共筛选获得159个差异表达基因,这些基因主要参与碳代谢、光合组织中的碳固定、氨基酸生物合成等过程。进一步实时荧光定量PCR对其中与碳代谢或氨基酸生物合成相关的8个候选基因表达量进行验证,发现这些基因在不同种质中的表达变化规律与容重差异变化趋势一致。【结论】阐明了玉米籽粒容重与其他品质性状之间的相关性,为高品质玉米新品种选育提供特异性种质及8个在碳还原、胚乳发育、淀粉代谢、细胞代谢和种子脂肪积累中起着重要作用的候选基因。

关键词：玉米籽粒容重品质性状调控机制

DESC: enabling secure data exchange based on smart contracts

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Science China(Information Sciences) 2018年第4期61卷 262-264页

作者： Jiao LIANG Weili han Zeqing GUO Yaoliang CHEN Chang CAO xiaoyang Sean WANG Fenghua LI Software School Fudan University Institute of Information Engineering Chinese Academy of Sciences

Dear editor,As data are one of the most important factors of today’s intelligent systems but are relatively scarce,people try exchanging data with other organizations or public ***,data exchange is now lack of a secu... 详细信息

关键词： enabling secure data exchange based on smart contracts

Towards Friction Stir Remanufacturing of High‑Strength Aluminum Components

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Acta Metallurgica Sinica(English Letters) 2023年第1期36卷 91-102页

作者： Xiangchen Meng Yuming Xie Xiaotian Ma Mingyang Liang xiaoyang Peng Shiwei han Lei Kan Xin Wang Sihao Chen Yongxian Huang State Key Laboratory of Advanced Welding and Joining Harbin Institute of TechnologyHarbin 150001China Chongqing Tiema Industries Group Co. Ltd.Chongqing 630050China The Sixth Military Representative Ofce of the Army Installment Station in Chongqing Chongqing 400042China Shanghai Spacefight Precision Machinery Institute Shanghai 201600China

Volumetric defects in high-strength aluminum alloy components were repaired via friction stir remanufacturing(FSR).Various consumable pins made of AA7075-T6 were *** diameters of the consumable pins afected material fow,which ensured that the materials at the repairing interface were forged to metallurgical *** angles determined load transfer besides material fow,which afected the fracture of the pins before the dwelling *** repaired components were achieved when the conical angle of the consumable pin was 1°larger than that of the volumetric *** ultimate tensile strength and elongation of the repaired components reached 445.9 MPa and 9.6%,*** design criteria of the consumable pin in the FSR was established,which provided valuable references to repair volumetric defects in high-strength aluminum components.

关键词： Aluminum alloy Defects Friction stir welding Interfaces Microstructures Mechanical properties

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假植密度对金萱茶苗生长及生理特性的影响

山东农业科学 2017年第5期49卷 46-51页

作者：乔明明向勤锃张丽霞韩晓阳田月月范延艮山东农业大学园艺科学与工程学院/泰安市茶叶工程技术研究中心山东泰安271018

茶苗假植是提高山东引种南方无性系良种茶苗成活率的一项重要技术措施。为筛选适宜山东气候条件的茶苗假植密度,以金萱茶树品种一年生扦插苗为试材,设置1株/丛(D1)、25株/丛(D2)、50株/丛(D3)、100株/丛(CK)四种假植密度进行试验,分析... 详细信息

茶苗假植是提高山东引种南方无性系良种茶苗成活率的一项重要技术措施。为筛选适宜山东气候条件的茶苗假植密度,以金萱茶树品种一年生扦插苗为试材,设置1株/丛(D1)、25株/丛(D2)、50株/丛(D3)、100株/丛(CK)四种假植密度进行试验,分析了不同处理茶苗的根形态参数、根系活力、新梢长度、叶绿素荧光参数以及移栽前的成活率,结果表明:(1)假植茶苗根区温度随密度增大而升高,在休眠期各处理之间差异显著,而萌芽期仅D1显著低于CK。(2)茶苗新根根长、根表面积、根体积和根系数量均表现为D3>D2>CK>D1,但D3、D2间差异不显著。此外,D3发根最早,且在休眠期根系活力显著高于其他处理;D2在萌芽期根系活力最高,但与D1、D3无显著差异。(3)茶苗成活率及新梢长度均以D2最高,叶绿素荧光参数Fv/Fm、Fv/Fo、qP值在休眠期均为D3>CK>D2>D1,在萌芽期却为D2>D3>D1>CK。综合分析比较,以D2处理能保持较适宜的根区温度,根系发育较好,萌芽期根系活力最高,新梢生长快,同时光照、水分、营养胁迫较小,是较为适宜的茶苗假植密度。

关键词：金萱无性系茶苗假植密度生理特性

Recent advances in spinel-type electrocatalysts for bifunctional oxygen reduction and oxygen evolution reactions

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Journal of Energy Chemistry 2021年第2期30卷 290-302,I0010页

作者： Xiao-Meng Liu xiaoyang Cui Kamran Dastafkan Hao-Fan Wang Cheng Tang Chuan Zhao Aibing Chen Chuanxin He Minghan han Qiang Zhang Beijing Key Laboratory of Green Chemical Reaction Engineering and Technology Department of Chemical EngineeringTsinghua UniversityBeijing 100084China School of Chemistry The University of New South WalesSydneyNSW 2052Australia AIST-Kyoto University Chemical Energy Materials Open Innovation Laboratory(ChEM-OIL) National Institute of Advanced Industrial Science and Technology(AIST)YoshidaSakyo-kuKyoto 606-8501Japan School of Chemical Engineering and Advanced Materials The University of AdelaideAdelaideSA 5005Australia College of Chemical and Pharmaceutical Engineering Hebei University of Science and TechnologyShijiazhuang 050018HebeiChina Shenzhen Key Laboratory of Functional Polymer College of Chemistry and Chemical EngineeringShenzhen UniversityShenzhen 518061GuangdongChina

The demand for efficient and environmentally-benign electrocatalysts that help availably harness the renewable energy resources is growing rapidly. In recent years, increasing insights into the design of water electrolysers, fuel cells, and metal–air batteries emerge in response to the need for developing sustainable energy carriers, in which the oxygen evolution reaction and the oxygen reduction reaction play key roles. However, both reactions suffer from sluggish kinetics that restricts the reactivity. Therefore, it is vital to probe into the structure of the catalysts to exploit high-performance bifunctional oxygen electrocatalysts. Spinel-type catalysts are a class of materials with advantages of versatility, low toxicity, low expense, high abundance, flexible ion arrangement, and multivalence structure. In this review, we afford a basic overview of spinel-type materials and then introduce the relevant theoretical principles for electrocatalytic activity, following that we shed light on the structure–property relationship strategies for spinel-type catalysts including electronic structure, microstructure, phase and composition regulation,and coupling with electrically conductive supports. We elaborate the relationship between structure and property, in order to provide some insights into the design of spinel-type bifunctional oxygen electrocatalysts.

关键词： Spinel electrocatalyst Bifunctional energy electrocatalysis Oxygen evolution reaction Oxygen reduction reaction Structure–property relationship