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Local Criteria Used by Farmers to Evaluate the Agronomic Performance and the Fertilizing Capacity of Cowpea Varieties: Diversity, Variability and Proximal Relation with Agronomic Measurements in Contrasted sahelian Locations

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Agricultural Sciences 2024年第1期15卷 114-131页

作者： Nouhou salifou Jangorzo Abdoul-Aziz saïdou Abou-Soufianou sadda Abdoulaye Moussa Mamoudou Hassane Bil-Assanou Issoufou Département des Sciences du Sol et Télédétection Université Dan Dicko Dankoulodo de Maradi Maradi Niger. Unité Mixte de Recherche “Diversité et Adaptation des Plantes” (UMR DAP) Université Dan Dicko Dankoulodo de Maradi Maradi Niger Centre Imaan de Support en Recherche Transdisciplinaire (Imaan Research) Niamey Niger Institut de Recherche pour le Développement Niamey Niger Université Boubacar ba de Tillabéri Tillabéri Niger Département des Sciences et Techniques de Productions Végétales Université Dan Dicko Dankoulodo de Maradi Maradi Niger

When contributing to participatory research, farmers usually appreciate the performance of cowpea varieties using qualitative scores. The score they attribute to each variety are based on local knowledge. The specific criteria they individually use to attribute a score are not well described. The objectives of this work were to: 1) identify and describe exhaustively the local criteria used by farmers to measure the agronomic performance of cowpea;2) assess the variability and statistical structure of these farmer criteria across local contexts;3) and analyze the association between these farmer criteria and the classical agronomic measurement. To achieve these objectives, an augmented block design was implemented across fifteen locations in the regions of Maradi, Dosso and Tillabéri, representing a diversity of local contexts. From a set of 36 cowpea varieties, fifteen varieties were sown per location, including five varieties (controls) common to all locations. In each location, two replicates were sown in randomized Fisher’s blocks. After agronomic measurement and participatory evaluation (scoring of varieties by farmers), a group survey (focus group) was conducted in each location to identify the criteria considered by farmers to found their discretional scoring of varieties during the participatory evaluation. The analysis of the data identified, across locations, thirteen criteria defined by farmers to characterize the agronomic performance of cowpea. Some of these criteria were different according to location. Farmers ranked the three varieties with the best performance for each agronomical trait (Top 3 varieties). A comparison of the farmer ranking with the ranking based on agronomic measurements revealed similarity and complementary between both methods. This study highlighted the importance of considering both local and scientific knowledge in local varietal evaluations.

关键词： Agronomic Performance Participatory Research Cowpea Farmers’ Criteria

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Developing Weibull-based diameter distributions for the major coniferous species in Heilongjiang Province,China

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林业研究:英文版 2023年第6期34卷 1803-1815页

作者： Qila sa Xingji Jin Timo Pukkala Fengri Li Key Laboratory of Sustainable Forest Ecosystem Management Ministry of EducationNortheast Forestry UniversityHarbin 150040People’s Republic of China University of Eastern Finland 80101 JoensuuFinland

Diameter distribution models play an important role in forest inventories,growth prediction,and *** Weibull probability density function is widely used in *** a number of methods have been proposed to predict or recover the Weibull distribution,their applicability and predictive performance for the major tree species of China remain to be *** in sample plots of three even-aged coniferous species(Larix olgensis,Pinus sylvestris and Pinus koraiensis)were measured both in un-thinned and thinned stands to develop parameter prediction models for the Weibull probability density *** least squares(OLS)and maximum likelihood regression(MLER),as well as cumulative distribution function regression(CDFR)were used,and their performance *** results show that MLER and CDFR were better than OLS in predicting diameter distributions of tree *** produced the best results in terms of fitting *** on the error statistics calculated for different age groups,CDFR was considered the most suitable method for developing prediction models for Weibull parameters in coniferous plantations.

关键词： Parameter prediction Maximum likelihood regression Cumulative distribution function regression

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基于无人机和地面调查的典型草原“种-面积”关系

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中国环境科学 2024年第9期44卷 5169-5179页

作者：朱萨宁高吉喜万华伟尤春赫杨雪郭雨桐祝晨佳吕娜中国环境科学研究院生态研究所北京100012 生态环境部卫星环境应用中心北京100094 北京林业大学草业与草原学院北京100091

本研究以呼伦贝尔市典型草原为研究对象,通过传统地面样方调查和无人机调查,系统研究了“种-面积”关系,确定了典型草原地面与无人机调查的最小调查面积.调查结果表明:1)典型草原的物种数量与调查面积呈非线性关系,“种-面积”关系呈现... 详细信息

本研究以呼伦贝尔市典型草原为研究对象,通过传统地面样方调查和无人机调查,系统研究了“种-面积”关系,确定了典型草原地面与无人机调查的最小调查面积.调查结果表明:1)典型草原的物种数量与调查面积呈非线性关系,“种-面积”关系呈现为S=aln(ba+1).基于组合样方法,至少要包括8个1m^(2)小样方,才能达到涵盖80%物种的目标,基于巢式样法,需要的最小调查面积为8.63m^(2);2)针对典型草原,无人机调查的平均物种发现率为传统地面调查方法的81.7%,无人机可作为地面调查的辅助手段,提高调查的效率;3)在典型草原物种监测中,可选取1个或2个组合样方,并使用无人机进行4~5次随机拍摄作为补充,此时可发现典型草原物种总数的84.7%~88.3%.该方法相对传统的3~5次重复样方调查,代表性更高,调查效率更高.

关键词： “种-面积”关系无人机地面调查典型草原

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Investigation on the crystal structure and mechanical properties of the ternary compound Mg_(11-x)Zn_(x)Sr combined with experimental measurements and first-principles calculations

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Journal of Magnesium and Alloys 2023年第3期11卷 1074-1082页

作者： Jian Wang Lingzhong Meng Zhang Zhang baisheng sa Xiaoxiao Fu Liyuan Sheng Daokui Xu Yufeng Zheng School of Mechanical Engineering Yangzhou UniversityYangzhou 225127China Key Laboratory of Eco-materials Advanced Technology College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China College of Materials Science and Engineering Chongqing UniversityChongqing 400044China Shenzhen Institute Peking UniversityShenzhen518057China PKU-HKUST ShenZhen-HongKong Institution Shenzhen 518057China Key Laboratory of Nuclear Materials and safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

A new ternary compound,Mg_(11-x)Zn_(x)Sr in the Mg-Zn-Sr system was observed and studied using Scanning Electron Microscopy(SEM),Energy-Dispersive Spectroscope(edS),X-Ray Diffraction(XRD)and Transmission Electron Microscopy(TEM).The XRD patterns were refined by the Rietveld refinement method and the results revealed that the crystallized Mg_(11-x)Zn_(x)Sr phase belonged to tetragonal I41/amd space group and had the Cd_(11)ba *** Mg atoms were successfully doped into Zn_(11)Sr crystal lattice by occupying Zn atomic ***,the Rietveld refinement and computational results demonstrated a gradual decrease in the a-axis and c-axis lattice parameters with decreasing concentration levels of Mg coordination substitution in the lattice of Mg_(11-x)Zn_(x)Sr *** elastic constants and modulus of the Mg_(11-x)Zn_(x)Sr compounds calculated by first-principles calculations(FPC)indicated they were increased with the increasing of Zn *** variation of hardness,D-band widths and the total density of states for Mg_(11-x)Zn_(x)Sr compounds with Zn content was discussed.

关键词： Mg-Zn-Sr system Crystal structure Hardness Elastic constants Modulus

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甘肃黄河流域土壤保持服务数据集(2001-2015年)

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高原气象 2024年第3期43卷 802-808页

作者：吴成永曹广超陈克龙巴丁求英刘宝康王润科石亚亚鄂崇毅天水师范学院资源与环境工程学院甘肃天水741001 青藏高原地表过程与生态保育教育部重点实验室/青海省自然地理与环境过程重点实验室青海西宁810008 高原科学与可持续发展研究院青海西宁810008

甘肃黄河流域是一个生态问题和发展问题交织在一起的自然-社会-经济复合生态系统,其生态系统土壤保持服务是防止水土流失和推动高质量发展的重要保障。使用归一化植被指数、土地利用产品MCD12Q1、降水数据、数字高程模型数据和土壤数据... 详细信息

甘肃黄河流域是一个生态问题和发展问题交织在一起的自然-社会-经济复合生态系统,其生态系统土壤保持服务是防止水土流失和推动高质量发展的重要保障。使用归一化植被指数、土地利用产品MCD12Q1、降水数据、数字高程模型数据和土壤数据库HWSD v1.1,运用修正通用土壤流失方程RUSLE,计算得到了甘肃黄河流域的土壤保持服务年度数据集。该数据集,空间范围为33°6′29″N-40°0′6″N、97°23′38″E-108°42′38″E,时间跨度为2001-2015年,可为制定土壤保持服务措施提供科学依据,也为评估生态安全和构建生态安全格局提供重要数据支撑。实体数据集获取网址为http://***/portal/metadata/a918f7ed-5988-44ea-80ad-ee14acab89aa.

关键词：甘肃黄河流域土壤保持服务修正通用土壤流失方程生态安全

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Engineering flexible and green electromagnetic interference shielding materials with high performance through modulating WS_(2) nanosheets on carbon fibers

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Journal of Materiomics 2022年第2期8卷 327-334页

作者： Huibin Zhang Tingting Liu Zehao Huang Junye Cheng Honghan Wang Deqing Zhang Xuewei ba Guangping Zheng Ming Yan Maosheng Cao School of Materials Science and Engineering Qiqihar UniversityQiqihar 161006China Department of Mechanical Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Department of Materials Science and Engineering And Shenzhen Key Laboratory for Additive Manufacturing of High-performance MaterialsSouthern University of Science and TechnologyShenzhen 518055China School of Materials Science and Engineering Beijing Institute of TechnologyBeijing 100081China

Flexible and wearable electromagnetic interference(EMI)shielding material is one of the current research focuses in the field of EMI *** this work,for the first time,WS_(2)-carbon fiber(WS_(2)-CF)composites are synthesized by implanting WS_(2),which has a multiphase structure and a large number of defects,onto the surface of carbon fiber(CF)by using a simple one-step hydrothermal method,and are applied to protect electronic devices from *** is found that the EMI shielding performance of WS_(2)-CF is significantly improved,especially for those at Se and *** 2 GHz,the EMI shielding efficiency could reach 36.0 dB at a typical thickness of 3.00 mm of the composite,which is much better than that of pure CF(25.5 dB).Besides paving a novel avenue to optimize the electromagnetic shielding performance of flexible and wearable CF-based EMI shielding materials,which have great potential in the practical application for EMI shielding,this work provides a new paradigm for the design and synthesis of EMI shielding materials which have a broad application prospect.

关键词： Flexible electromagneic shielding Carbon fibers WS_(2) Conductive networks

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Upgrading Microsoft Visual basic 6.0 to Microsoft Visual *** /

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2002年

作者： Robinson ed

来源：畅想之星图书光盘版（南... 评论

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Determination of reference intervals for metabolic profile of Hanwoo cows at early, middle and late gestation periods

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Journal of Animal Science and Biotechnology 2015年第2期6卷 252-256页

作者： Da Chuan Piao Tao Wang Jae Sung Lee Renato sa Vega sang Ki Kang Yun Jaie Choi Hong Gu Lee Laboratory of Animal Cell Biotechnology Department of Agricultural Biotechnology Seoul National University College of Animal Science and Technology Jilin Agricultural University Key Laboratory of Animal Nutrition and Feed Science Jilin Province Jilin Agricultural University Department of Animal Science and Technology College of Animal Bioscience& Technology Konkuk University Animal & Dairy Sciences Cluster College of AgricultureUniversity of the Philippines Los Ba?ose

background： Metabolic profile was initially designed as a presymptomatic diagnostic aid based on statistical analyses of blood metabolites to provide an early warning of certain types of metabolic disorder. However, there is little metabolic profile data available about Korean Hanwoo cows. Therefore, this study aimed to determine the reference intervals of metabolic profile for Korean Hanwoo cows. Methods： Healthy animals （2,205） were selected and divided into early （day 1 to 95）, middle （day 96 to 190） and late （day 191 to 285） period according to their gestating period. Metabolic profile including total protein （TP）, albumin （AIb）, urea （UREA）, glucose （Glu）, total cholesterol （T-Cho）, long-chain fatty acid （LCFA）, aspartate aminotransferase （AST）, gamma-glutamyl transpeptidase （GGT）, creatinine （Crea）, calcium （Ca）, inorganic phosphorous （iP） and magnesium （Mg） were analyzed using a Tba-4OFR automatic biochemical analyzer. The data of Korean Hanwoo cows were then compared to those of the Japanese Wagyu cows. Results： Most of the data of the Korean Hanwoo cows were relatively higher than those of Japanese Wagyu cows, with the exception of Glu and GGT. This may indicate that the nutritional level of feed for the Korean Hanwoo cows was higher than that of the Japanese Wagyu cows because of the different feeding system. In particular, relatively higher levels of UREA and LCFA were observed in the Korean Hanwoo cows, and this may also contribute to the low reproduction efficiency. Conclusions： These findings may provide some theoretical basis for understanding the reproductive and feeding situation of Korean Hanwoo cows.

关键词： Hanwoo cows Metabolic profile Reference intervals Wagyu cows

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2022年6-12月济南市境外输入性新冠肺炎流行病学和基因特征分析

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中国国境卫生检疫杂志 2024年第4期47卷 403-409页

作者：白飒刘保华闫荣军孙连波赵辉张涛韩焕美黄伟济南国际旅行卫生保健中心山东济南250012 济南海关青岛国际旅行卫生保健中心济南机场海关

目的分析境外输入新冠病毒的流行特征和基因组特征,为济南疫情防控工作提供参考依据。方法收集济南航空口岸2022年6-12月境外输入新冠病毒感染者相关信息,分析其流行病学特征,筛选77例感染者样本使用二代测序技术进行高通量测序,分析基... 详细信息

目的分析境外输入新冠病毒的流行特征和基因组特征,为济南疫情防控工作提供参考依据。方法收集济南航空口岸2022年6-12月境外输入新冠病毒感染者相关信息,分析其流行病学特征,筛选77例感染者样本使用二代测序技术进行高通量测序,分析基因分型及变异特征。结果2022年6-12月,济南航空口岸累计报告输入性新冠病毒无症状感染者165例,男女性别比2.17∶1,平均年龄37.46岁;67.27%感染者接种过疫苗;职业以务工工人为主,占26.67%;来源国家主要是韩国,占21.21%。共获得77条有效的全基因组序列,按照Nextstrain分型法可分为8个型,均为Omicron变异株,优势进化分支主要是ba.2、ba.5.2及ba.5.10.1。系统发育分析表明,境外输入新冠病毒感染者的序列与来源国家的毒株序列高度同源。结论济南航空口岸境外输入新冠病毒风险持续存在,在及时跟踪疫情动态的同时,变异监测及防控措施仍需坚持不懈。

关键词：新冠病毒输入全基因组测序进化分析

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三七皂苷在大鼠外翻肠囊中的吸收及与P-糖蛋白相互作用研究

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北京中医药大学学报 2011年第12期34卷 836-842页

作者：萨础拉吕航姜艳艳巴寅颖石任兵北京中医药大学中药学院国家中医药管理局中药经典名方有效物质发现重点研究室北京100102 北京市教委中药质量控制技术工程中心

目的研究三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠外翻肠囊模型中的吸收特性及其与P-糖蛋白(P-gp)的相互作用。方法采用HPLC法,建立三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在肠液中含量测定方... 详细信息

目的研究三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠外翻肠囊模型中的吸收特性及其与P-糖蛋白(P-gp)的相互作用。方法采用HPLC法,建立三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在肠液中含量测定方法。采用大鼠外翻肠囊模型,考察不同时间、不同浓度及不同转运方向对三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1大鼠小肠吸收和转运的影响,并考察三七皂苷有效组分与P-gp抑制剂维拉帕米(Ver)合用前后,大鼠肠囊内人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1吸收量的变化。分别设空白组、Ver阳性对照组、三七皂苷有效组分高、中、低浓度组,考察三七皂苷有效组分对P-gp底物罗丹明-123(Rho123)转运的影响。结果三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在不同时间及不同浓度条件下,对大鼠小肠的吸收和转运均为线性吸收,其回归系数r>0.9,均符合零级吸收速率。三七皂苷有效组分小肠吸收转运明显受到转运方向的影响,浆膜面至黏膜面B-A的转运量明显高于黏膜面至浆膜面A-B。三七皂苷有效组分与Ver合用后,人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠小肠中的吸收量显著增加(P<0.05)。三七皂苷有效组分可使P-gp底物Rho123转运量增加,与空白组比较有显著性差异(P<0.05),尤其以三七皂苷有效组分高浓度组最为显著,与Ver阳性对照组比较有显著性差异(P<0.01)。结论三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠小肠的吸收和转运均为线性吸收,可认为在大鼠小肠吸收机制为被动转运机制,并具有明显的P-gp底物转运特性及抑制P-gp底物外排作用。

关键词：三七皂苷外翻肠囊 P-糖蛋白高效液相色谱大鼠

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