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滴灌分次施肥下夏玉米养分积累及土壤无机氮残留的特性

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玉米科学 2024年第2期32卷 126-134页

作者：许丽李雪洁张红祥孙雪芳孙青刘树堂姜雯青岛农业大学农学院山东青岛266109

在滴灌条件下,以玉米郑单958为试材,设4个施肥处理:CK(对照)、T1、T2、T3,探究氮、磷、钾肥分次施肥处理对夏玉米养分吸收和土壤无机氮残留的影响。结果表明,各处理夏玉米对氮素和磷素吸收速率最大的时期均为大喇叭口期至吐丝期,钾素为... 详细信息

在滴灌条件下,以玉米郑单958为试材,设4个施肥处理:CK(对照)、T1、T2、T3,探究氮、磷、钾肥分次施肥处理对夏玉米养分吸收和土壤无机氮残留的影响。结果表明,各处理夏玉米对氮素和磷素吸收速率最大的时期均为大喇叭口期至吐丝期,钾素为拔节期至大喇叭口期;吐丝期至成熟期氮、磷吸收积累量分别占全生育期43.05%~54.07%、41.76%~52.27%,钾几乎不再吸收(T3处理除外)。处理间比较,玉米V12期T3处理植株磷含量显著低于T2处理29.18%(2019年)和CK处理17.61%(2020年);吐丝期T1处理钾含量显著高于T3处理30.73%(2019年)和20.51%(2020年)。与CK和T2处理相比,T1和T3处理均能显著降低成熟期深层土壤无机氮残留。各分次追肥处理百公斤玉米子粒产量养分吸收量氮、磷、钾均值分别为2.31、0.90、2.09 kg。综合分析,在T1处理基础上推荐黄淮海夏玉米滴灌条件下播种期、大喇叭口期、抽雄吐丝期氮、磷、钾分次施肥比例为40%∶20%∶40%、35%∶25%∶40%、75%∶25%∶0,可更好满足玉米各生育期对养分的需求,降低深层土壤硝态氮残留。

关键词：夏玉米滴灌追肥氮磷钾产量无机氮残留

Carbon Sequestration in Soil Humic Substances Under Long-Term Fertilization in a Wheat-Maize System from North China

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Journal of Integrative Agriculture 2014年第3期13卷 562-569页

作者： SONG Xiang-yun liu shu-tang liu Qing-hua ZHANG Wen-ju HU Chun-guang College of Resources and Environment Qingdao Agricultural University Institute of Agricultural Resources and Regional Planning Chinese Academy of Agricultural Sciences

The changes in humic substances （HS） is fundamental in detecting soil carbon sequestration mechanisms in natural and cultivated environments. Based on a long-term trial, the amounts of water dissolved substances （WSS）, humic acid （HA）, fulvic acid （FA） and humin （HU） were determined to explore the impact of long-term fertilization on HS. Increases in the amounts of WSS, HA, FA and HU were significant different among the treatments with manure. A significant correlation was found between the increased soil organic carbon （SOC） and HS （R^2=0.98, P〈0.01）. The change in the E4/E6 ratio was significantly correlated with the increased SOC （R2=0.88, P〈0.01）, HA （R^2=0.91, P〈0.01）, FA （R^2=0.91, P〈0.01） and HU （R^2=0.88, P〈0.01）. The cluster was mainly divided into two parts as manure fertilization and inorganic fertilization, based on the increases in HA, FA and HU. These results suggest that long term fertilization with manure favours carbon sequestration in HS and is mainly stabilized as HU, while the HA becomes more aliphatic. We conclude that increases in SOC can be linked to changes in the molecular characteristics of HS fractions under long term fertilization.

关键词： carbon sequestration humic acid humin long term fertilization E4/E6 ratio

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钢渣粗集料骨架间隙率变化规律及应用

科学技术与工程 2024年第19期24卷 8290-8296页

作者：俄广迅曹卫东陈鲁川刘树堂丁婷婷山东高速集团有限公司济南250098 山东大学齐鲁交通学院济南250002 山东省交通规划设计院集团有限公司济南250101

为指导钢渣沥青玛蹄脂碎石混合料(stone mastic asphalt,SMA)级配设计,采用混料试验设计方法与粗集料振实试验,研究了不同组合方案的钢渣粗集料、玄武岩粗集料及玄武岩与钢渣混合粗集料骨架间隙率(voids in coarse aggregate,VCA)变化规... 详细信息

为指导钢渣沥青玛蹄脂碎石混合料(stone mastic asphalt,SMA)级配设计,采用混料试验设计方法与粗集料振实试验,研究了不同组合方案的钢渣粗集料、玄武岩粗集料及玄武岩与钢渣混合粗集料骨架间隙率(voids in coarse aggregate,VCA)变化规律,建立了3类粗集料VCA与各档粗集料比例之间的回归模型。结果表明:钢渣粗集料VCA与各档粗集料比例之间呈多元非线性关系,玄武岩粗集料及钢渣与玄武岩混合粗集料的VCA亦为类似规律;相同级配下钢渣粗集料VCA的数值不同于玄武岩粗集料及钢渣与玄武岩混合粗集料。利用建立的回归模型可预测不同级配曲线的VCA大小次序进而预知矿料间隙率(voids in mineral aggregate,VMA)大小顺序,为SMA配合比优化设计中级配的确定提供依据。

关键词：钢渣粗集料骨架间隙率沥青玛蹄脂碎石混合料回归模型级配设计

The secretory function of adipose tissues in metabolic regulation

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Life Metabolism 2024年第2期3卷 9-23页

作者： Yang liu shu-Wen Qian Yan tang Qi-Qun tang Key Laboratory of Metabolism and Molecular Medicine of the Ministry of Education Department of Biochemistry and Molecular Biology of School of Basic Medical Sciences and Department of Endocrinology and Metabolism of Zhongshan HospitalFudan UniversityShanghai 200032China

In addition to their pivotal roles in energy storage and expenditure,adipose tissues play a crucial part in the secretion of bioactive molecules,including peptides,lipids,metabolites,and extracellular vesicles,in response to physiological stimulation and met-abolic *** secretory factors,through autocrine and paracrine mechanisms,regulate various processes within adipose *** processes include adipogenesis,glucose and lipid metabolism,inflammation,and adaptive thermogenesis,all of which are essential for the maintenance of the balance and functionality of the adipose tissue micro-environment.A subset of these adipose-derived secretory factors can enter the circulation and target the distant tissues to regulate appetite,cognitive function,energy expenditure,insulin secretion and sensitivity,gluconeogenesis,cardiovascular remodeling,and exercise *** this review,we highlight the role of adipose-derived secretory factors and their signaling pathways in modulating meta-bolic ***,we delve into the alterations in both the content and secretion processes of these factors under various physiological and pathological conditions,shedding light on potential pharmacological treatment strategies for related diseases.

关键词： adipokines autocrine paracrine endocrine metabolic regulation

Enhancing cellular behavior in repaired tissue via silk fibroin-integrated triboelectric nanogenerators

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Microsystems & Nanoengineering 2024年第3期10卷 137-147页

作者： Zhelin Li shuxing Xu Zijie Xu Sheng shu Guanlin liu Jianda Zhou Ding Lin Wei tang Changsha Aier Eye Hospital Aier School of OphthalmologyCentral South UniversityChangshaHunanChina The Xiangya Hospital Central South UniversityChangshaHunanChina Beijing Institute of Nanoenergy and Nanosystems Chinese Academy of SciencesBeijing 101400China Center on Nanoenergy Research School of Physical Science&TechnologyGuangxi UniversityNanning 530004China School of Nanoscience and Technology University of Chinese Academy of SciencesBeijing 100049China Department of Plastic Surgery the Third Xiangya HospitalChangshaHunanChina

Triboelectric nanogenerators(TENGs)have emerged as a promising approach for generating electricity and providing electrical stimuli in medical electronic *** their potential benefits,the clinical implementation of TENGs faces challenges such as skin compliance and a lack of comprehensive assessment regarding their biosafety and ***,further research is imperative to overcome these limitations and unlock the full potential of TENGs in various biomedical *** this study,we present a flexible silk fibroin-based triboelectric nanogenerator(SFB-TENG)that features an on-skin substrate and is characterized by excellent skin compliance and air/water *** range of electrical output generated by the SFB-TENG was shown to facilitate the migration and proliferation of Hy926,NIH-3T3 and RSC96 ***,apoptosis of fibroblast NIH-3T3 cells was observed when the output voltage increased to more than 20 V at a frequency of 2 *** addition,the moderate electrical stimulation provided by the SFB-TENG promoted the cell proliferation cycle in Hy926 *** research highlights the efficacy of a TENG system featuring a flexible and skin-friendly design,as well as its safe operating conditions for use in biomedical *** findings position TENGs as highly promising candidates for practical applications in the field of tissue regeneration.

关键词： overcome spite generating

不同空间Julia集的非线性广义同步(英文)

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控制理论与应用 2013年第9期30卷 1159-1164页

作者：刘平刘树堂山东农业大学机械与电子工程学院山东省园艺机械与装备重点实验室山东泰安281018 山东大学控制科学与工程学院山东济南250061

基于利用线性耦合实现空间Julia集线性广义同步的研究成果,本文通过应用非线性反馈控制和引入变量变换的方法解决了空间Julia集的非线性广义同步问题.首先基于变量变换,得到误差空间Julia系统,为了镇定该系统使其实现非线性广义同步,给... 详细信息

基于利用线性耦合实现空间Julia集线性广义同步的研究成果,本文通过应用非线性反馈控制和引入变量变换的方法解决了空间Julia集的非线性广义同步问题.首先基于变量变换,得到误差空间Julia系统,为了镇定该系统使其实现非线性广义同步,给出了确定的非线性函数关系式.另外,根据空间Julia集的稳定区域,解析地确定了实现非线性广义同步的耦合强度的稳定域.然后,给出了稳定的复不动平面与空间Julia集的同步的关系.最后,用一个例子验证了该解析方法是可行的.

关键词：空间Julia集广义同步稳定区域复杂的

The identification of AMZ2 as a candidate causative gene in a severe teratozoospermia patient characterized by vacuolated spermatozoa

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Asian Journal of Andrology 2024年第1期26卷 107-111页

作者： liu liu Jing Yang Wen-Jing Zhang Yi-Ling Zhou Gui-Jun Zhao Ya Huang shu-Yan tang Obstetrics and Gynecology Hospital Fudan UniversityShanghai 200011China Shanghai Key Laboratory of Female Reproductive Endocrine Related Diseases Shanghai 200011China State Key Laboratory of Genetic Engineering and Collaborative Innovation Center for Genetics and Development Department of Computational BiologySchool of Life SciencesFudan UniversityShanghai 200436China Shanghai Towako Hospital Shanghai 200131China Shanghai Institute of Medical Genetics Shanghai Children's HospitalShanghai Jiao Tong UniversityShanghai 200040China

Teratozoospermia with cephalic defects is one of the most severe types of sperm defects known to *** several monogenic factors are linked to cephalic abnormalities,such as globozoospermia and macrozoospermia,the genetic cause of vacuolated spermatozoa remains inadequately ***,we analyzed whole-exome sequencing(WES)data for an individual from a consanguineous family with severely vacuolated *** analysis revealed a novel homozygous c.520A>G(***174Ala)variant in the archaelysin family metallopeptidase 2(AMZ2),a gene that encodes a zinc metalloprotease previously shown to be highly expressed in the testes and *** algorithms predicted this variant to be a damaging *** with an autosomal recessive mode of inheritance,this variant was inherited from heterozygous parental *** investigate the potential pathogenicity of the identified variant,we compared the AMZ2 expression in sperm cells from the patient with the AMZ2 variant and from a healthy *** analysis revealed that the homozygous missense variant in AMZ2 abolished AMZ2 expression in the *** findings reveal a candidate causative gene for vacuolated spermatozoa.

关键词： AMZ2 male infertility sperm quality teratozoospermia

Influence of Long-Term Fixed Fertilization on Diversity of Arbuscular Mycorrhizal Fungi

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Pedosphere 2009年第5期19卷 663-672页

作者： WANG Miao-Yan HU Liang-Bin WANG Wei-Hua liu shu-tang LI Min liu Run-Jin Institute of Mycorrhizal Bioteehnology Agronomy and Plant Protection College Qingdao Agricultural University Qingdao 266109 (China) College of Food Henan Institute of Science and Technology Xinxiang 453003 (China) College of Resources and Environment Qingdao Agricultural Univers-ity Qingda~ 266109 (China)

Diversity of arbuscular mycorrhizal fungi(AMF) was investigated in a field that had received long-term fixed ferti-lization(LFF) for 26 *** were a total of 12 treatments in triplicates with different amounts of manure,urea,calcium phosphate,and potassium *** soil samples of maize and wheat grown in the experimental field in Shandong Province,China,were collected in September 2003 and May 2004,*** mycorrhizal fungal spores were isolated and identified using morphological *** colonization percentage,spore density(SD),species richness(SR),relative abundance(RA),and Shannon-Weiner index(SWI) were *** recognized species of AMF belonging to 5 genera were ***-term fixed fertilization significantly influenced colonization percentage,SR,SD,and species diversity of *** adaptability of AMF to soil fertility was different among *** richness and SD of AMF in maize and wheat rhizosphere soils were the highest in the nonferti-lization treatment(control) and lowest in the high manure + high nitrogen treatment(M2N2).The SWI decreased as the fertilization level increased except in the low manure treatment(M1) on *** with the other treatments,Treatment M2N2 significantly reduced SD of Glomus,and the high manure + low nitrogen treatment(M2N1) significantly retarded sporulation of *** treatments stimulated sporulation of Glomus *** density of *** was higher in the high nitrogen + phosphorus + potassium treatment(N2PK) than in the high nitrogen + phosphorus treatment(N2P) and the high nitrogen + potassium treatment(N2K).The SD of *** was higher in Treatment N2K than Treatments N2PK and *** conclusion,long-term fixed fertilization,especially with high levels of manure and N,decreased SR,SD,and colonization and changed the species composition of AMF.

关键词： maize mycorrhizal colonization mycorrhizal sporulation rhizosphere soil wheat

空间交替Julia集的反馈控制与线性广义同步

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物理学报 2014年第6期63卷 84-97页

作者：王培刘树堂山东大学控制科学与工程学院济南250061

讨论了由空间交替系统迭代产生的空间交替Julia集.空间交替Julia集是由交替的复动力系统zm+1,n+azm,n+1=(1+a)2z2mn+ci,i=1,2迭代产生的,且通过辅助反馈控制方法实现了对空间交替Julia集的控制.同时利用线性反馈的方法,实现了不同空间交... 详细信息

讨论了由空间交替系统迭代产生的空间交替Julia集.空间交替Julia集是由交替的复动力系统zm+1,n+azm,n+1=(1+a)2z2mn+ci,i=1,2迭代产生的,且通过辅助反馈控制方法实现了对空间交替Julia集的控制.同时利用线性反馈的方法,实现了不同空间交替Julia集之间的线性广义同步.仿真结果验证了控制和同步方法的有效性.

关键词：空间交替Julia集辅助反馈控制同步线性广义同步