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Nitrogen rhizodeposition from corn and soybean,and its contribution to the subsequent wheat crops

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Journal of Integrative Agriculture 2024年第7期23卷 2446-2457页

作者： Sainan Geng Lantao Li yuhong Miao Yinjie Zhang Xiaona Yu Duo Zhang Qirui Yang Xiao Zhang Yilun wang College of Resources and Environment Henan Agricultural UniversityZhengzhou 450002China

Nitrogen(N)is a key factor in the positive response of cereal crops that follow leguminous crops when compared to gramineous crops in rotations,with the nonrecyclable rhizosphere-derived N playing an important ***,quantitative assessments of differences in the N derived from rhizodeposition(NdfR)between legumes and gramineous crops are lacking,and comparative studies on their contributions to the subsequent cereals are *** this study,we conducted a meta-analysis of NdfR from leguminous and gramineous crops based on 34 observations published *** addition,pot experiments were conducted to study the differences in the NdfR amounts,distributions and subsequent effects of two major wheat(Triticum aestivum L.)-preceding crops,corn(Zea mays L.)and soybean(Glycine max L.),by the cotton wick-labelling method in the main wheat-producing areas of *** meta-analysis results showed that the NdfR of legumes was significantly greater by 138.93%compared to gramineous *** our pot experiment,the NdfR values from corn and soybean were 502.32 and 944.12 mg/pot,respectively,and soybean was also significantly higher than corn,accounting for 76.91 and 84.15%of the total belowground nitrogen of the plants,***,in different soil particle sizes,NdfR was mainly enriched in the large macro-aggregates(>2 mm),followed by the small macro-aggregates(2–0.25 mm).The amount and proportion of NdfR in the macro-aggregates(>0.25 mm)of soybean were 3.48 and 1.66 times higher than those of corn,respectively,indicating the high utilization potential of soybean *** the N accumulation of subsequent wheat,the contribution of soybean NdfR to wheat was approximately 3 times that of corn,accounting for 8.37 and 4.04%of the total N uptake of wheat,*** conclusion,soybean NdfR is superior to corn in terms of the quantity and distribution ratio of soil *** future field production,legume NdfR should be included in the nitrogen p

关键词： crop rotation nitrogen rhizodeposition meta-analysis soil aggregates nitrogen transfer

Preliminary evidence for 17 coastal terraces on Fildes Peninsula, King George Island, Antarctica

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Advances in Polar Science 2015年第1期26卷 80-87页

作者： CHU Zhuding YIN Xuebin SUN Liguang wang yuhong Institute of Polar Environment School of Earth and Space Sciences University of Science and Technology of China

This study confirms the presence of 17 coastal terraces on Fildes Peninsula, Antarctica based on field observations and grain size analysis. The terraces formed by isostatic uplift during climate warming and glacier melting, and each level corresponds to a relatively stable period of climate. The grain size characteristics indicate an overlapping sedimentary origin for the sediments on the coastal terraces. The consistency of regional sea level rise, climate change, and glacial area suggest the presence of similar coastal terraces on King George Island since 18.0 ka.

关键词： Fildes Peninsula coastal terrace grain size characteristics

Design of a Bio-inspired,Two-winged,Flapping-wing Micro Air Vehicle with High-lift Performance

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Journal of Bionic Engineering 2024年第3期21卷 1191-1207页

作者： Kai Hu Huichao Deng Shengjie Xiao Gongyu Yang yuhong Sun Space Robot Laboratory The School of Mechanical EngineeringBeihang UniversityBeijing100191China

In this paper,we present the development of our latest flapping-wing micro air vehicle(FW-MAV),named Explobird,which features two wings with a wingspan of 195 mm and weighs a mere 25.2 g,enabling it to accomplish vertical take-off and hover *** devised a novel gear-based mechanism for the flapping system to achieve high lift capability and reliability and conducted extensive testing and analysis on the wings to optimise power matching and lift *** Explobird can deliver a peak lift-to-weight ratio of 1.472 and an endurance time of 259 s during hover flight powered by a single-cell LiPo *** the inherent instability of the prototype,we discuss the derivatives of its longitudinal system,underscoring the importance of feedback control,position of the centre of gravity,and increased *** demonstrate the effect of damping enhancement on stability,we also designed a passive stable ***,the vehicle is actively stabilised in roll by adjusting the wing root bars and in pitch through high-authority tail control,whereas yaw is passively *** a series of flight tests,we successfully demonstrate that our prototype can perform vertical take-off and hover flight under wireless *** promising results position the Explobird as a robust vehicle with high lift capability,paving the way towards the use of FW-MAVs for carrying load equipment in multiple tasks.

关键词： Flapping wing Biologically inspired robots Mechanical design Flight dynamics Damping enhancement

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4个异源四倍体棉种自然群体遗传多样性解析

中国棉花 2024年第7期51卷 12-17,F0002页

作者：刘平许艳超王恒蔡小彦周忠丽侯宇清王玉红刘记陈全家刘方袁有禄郑杰新疆农业大学农学院/棉花教育部工程研究中心乌鲁木齐830052 中国农业科学院棉花研究所河南安阳455000 中国农业科学院国家南繁研究院海南三亚572024

利用4个四倍体棉种(陆地棉野生种系、海岛棉、毛棉、达尔文氏棉)共116份材料的9个表型性状数据进行遗传多样性和聚类分析发现:毛棉的遗传多样性高于其他3个四倍体棉种;气孔导度与蒸腾速率、细胞间隙CO_(2)浓度,叶蜜腺到叶柄距离与叶蜜... 详细信息

利用4个四倍体棉种(陆地棉野生种系、海岛棉、毛棉、达尔文氏棉)共116份材料的9个表型性状数据进行遗传多样性和聚类分析发现:毛棉的遗传多样性高于其他3个四倍体棉种;气孔导度与蒸腾速率、细胞间隙CO_(2)浓度,叶蜜腺到叶柄距离与叶蜜腺数、叶绿素含量、叶面积,叶蜜腺数与叶绿素含量、叶面积呈极其显著正相关关系;主茎茸毛数与叶面积、叶蜜腺到叶柄距离、叶绿素含量、叶蜜腺数呈极其显著负相关关系;通过对4个四倍体棉种表型性状进行主成分分析和聚类分析,得出本研究中的陆地棉野生种系材料与海岛棉材料之间亲缘关系最近,但与毛棉材料亲缘关系最远。本研究为有效利用陆地棉野生种系和野生棉种质资源提供了理论依据。

关键词：四倍体棉种遗传多样性表型聚类分析

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厨余垃圾产物营养土对西瓜幼苗质量影响研究

浙江农业科学 2024年第9期65卷 2100-2103页

作者：张华峰章晓鹏王侃张蕾琛李林章史骏黄芸萍胡紫蔚王毓洪宁波市农业科学研究院宁波市特色园艺作物品质调控和抗性育种重点实验室浙江宁波315040 宁波首创厨余垃圾处理有限公司浙江宁波315040

为探究厨余垃圾产物资源化利用,针对厨余垃圾产物沼渣制备的营养土对西瓜幼苗质量的影响开展比较试验,分析营养土相对于商品基质在西瓜育苗的差异,为厨余垃圾产物在西瓜育苗生产提供理论和技术支撑。结果显示,营养土基质处理(T3)对西瓜... 详细信息

为探究厨余垃圾产物资源化利用,针对厨余垃圾产物沼渣制备的营养土对西瓜幼苗质量的影响开展比较试验,分析营养土相对于商品基质在西瓜育苗的差异,为厨余垃圾产物在西瓜育苗生产提供理论和技术支撑。结果显示,营养土基质处理(T3)对西瓜育苗的质量无显著影响,首创营养土基质和康成牌基质按照1∶1比例复配的处理(T2)西瓜出苗率达98%,西瓜幼苗植物学性状指标和生理指标优于商品育苗基质处理(T1),均符合幼苗生长的要求,且在使用成本上具有优势,因此,营养土可优选用作西瓜育苗基质,作为添加物实现替代基质部分主料。

关键词：厨余垃圾沼渣营养土西瓜幼苗

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毒蛇咬伤致皮肤坏死性感染的危险因素及预测模型研究

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临床急诊杂志 2024年第3期25卷 110-114页

作者：郝嘉宁王宇宏王文博戴秋婷朱明月李伦超赵晓东刘双庆解放军总医院第四医学中心急诊医学科北京100037 联勤保障部队天津康复疗养中心内分泌科三峡大学第二临床附属医院心内科

目的:分析毒蛇咬伤致皮肤坏死性感染的危险因素,并构建预测模型。方法:回顾性分析99例毒蛇咬伤患者的临床资料,确定是否发生皮肤坏死性感染为结局,采用单因素及多因素logistics回归分析构建预测模型并予以验证。结果:蛇伤严重度评分、... 详细信息

目的:分析毒蛇咬伤致皮肤坏死性感染的危险因素,并构建预测模型。方法:回顾性分析99例毒蛇咬伤患者的临床资料,确定是否发生皮肤坏死性感染为结局,采用单因素及多因素logistics回归分析构建预测模型并予以验证。结果:蛇伤严重度评分、血糖及D-二聚体水平为毒蛇咬伤致皮肤坏死性感染的危险因素(均P<0.05)。利用上述危险因素构建列线图预测模型,预测发生皮肤坏死性感染的曲线下面积分别为0.92;预测模型的校准曲线在两组中均表现出较好的一致性。结论:蛇伤严重度评分、血糖及D-二聚体水平是毒蛇咬伤后发生皮肤坏死性感染的危险因素,该模型可为临床决策提供参考。

关键词：毒蛇咬伤坏死性感染危险因素预测模型

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基于实例的GIS数据库模式匹配方法

武汉大学学报（信息科学版） 2008年第1期33卷 46-50页

作者：王育红陈军河南理工大学测绘与国土信息工程学院焦作市454003 国家基础地理信息中心北京市100044

针对空间数据库的特点,提出了一种改进的基于实例的层次式模式匹配方法,并解决了实体对应关系的自动建立、要素类相似性计算、属性相似性计算等问题。最后,通过实验验证了该方法的有效性。

关键词：模式匹配相似性 GIS数据库更新共同实体识别

Pulmonary embolism secondary to acute anterior ST-elevation myocardial infarction:a case report

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World Journal of Emergency Medicine 2024年第2期15卷 139-141页

作者： Lin Yuan Hong Li yuhong Mi Ying Liang Emergency Critical Center Beijing Anzhen HospitalCapital Medical UniversityBeijing 100029China

Thrombophilia denotes a condition,whether acquired or hereditary,characterized by increased susceptibility to hypercoagulation.[1]This condition was first described in 1965,coinciding with the discovery of an inherited predisposition to venous thromboembolism(VTE)in patients deficient in antithrombin III.[2]While arterial and venous thromboses are common in hospitalized patients,acute myocardial infarction(AMI)and pulmonary embolism(PE)stand out as ***,theoccurrenceof AMI complicated by PE is exceedingly rare,especially when considering cases where paradoxical embolism originating from a patent foramen ovale is *** report presents a case of AMI complicated with PE.A comprehensive understanding of the pathophysiology of this rare yet critical condition is important for ensuring prompt diagnosis and treatment.

关键词： embolism infarction acute

Wide hybridizations reveal the robustness of functional centromeres in Triticum-Aegilops species complex lines

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Journal of Genetics and Genomics 2024年第5期51卷 570-573页

作者： yuhong Huang Qinghua Shi Chen Zhou Chunhui wang Yang Liu Congyang Yi Handong Su Fangpu Han State Key Laboratory of Plant Cell and Chromosome Engineering Institute of Genetics and Developmental BiologyInnovation Academy for Seed DesignChinese Academy of SciencesBeijing 100101China University of Chinese Academy of Sciences Bejing 100049China National Key Laboratory of Crop Genetic Improvement Hubei Hongshan LaboratoryHuazhong Agricultural UniversityWuhanHubei430070China

The Triticum-Aegilops complex groups demonstrated high cross-affinity with each other to overcome the barriers of distant hybridization(Loureiro et al.,2023).Distant hybridization involves two distinct yet closely related events:hybridization and genome *** studies have indicated that bursts of transposable elements(TEs)can occur as a consequence or concomitant to hybridization or genome duplication(Parisod et al.,2010).This raises an important scientific question regarding how the TEs-rich centromere region copes with genomic shock(McClintock,1984).The Triticum-Aegilops species complexes,particularly in the F1,So,and subsequent early generations resulting from successive selfcrossing,offer an opportunity to investigate whether the centromere environment undergoes reconstruction and the associated mechanisms that maintain genomic stability.

关键词： centromere Triticum complex