Subjects: Other Disciplines >> Synthetic discipline submitted time 2023-03-28 Cooperative journals: 《中国科学院院刊》
Abstract： Innovation-driven development has been a new development direction among global economies. Innovation statistics provide a new platform for understanding the interaction of science, technology, and economy. The practice of innovation statistics in developed countries has formed a good standard system and international standard. China, based on international practice, has established a new system of innovation statistics and laid the foundation for further promoting the strategy of innovation-driven development. In the future, China will still need to take international standards as the base, understand the development reality of the country, respect the law of statistics, pay attention to the statistics and research of innovative talents, and promote the construction of the innovation statistics system.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] This paper try to propose a scientific, effective and reusable method to identify key technologies based on the perspective of intelligence research. It aims to provide information support for nation, regions, enterprises and innovative institutions to discover, deploy and promote the prospective R&D of key technologies.[Method/process] Based on the definition of key technology and its types, this paper used K-means++ algorithm to cluster scientific papers to identify hotspot technologies. Then it used the hotspot technologies as nodes to construct and visualize complex network through secondary clustering and Gephi. Structural holes theory was adopted to analysis the network and attributes of nodes, and thereby selected generic technologies. Link prediction algorithm was used to predict the missing edges in the network according to the structure, and we can identify the potential emerging technologies based on the phenomenon of cross-fusion of hot technologies to promote the formation of innovative technologies.[Result/conclusion] Taking the Intelligent Manufacturing as an example to carry out empirical research on the method, and validated the operability and effectiveness of the method through national authoritative documents and literature research.
Subjects: Medicine, Pharmacy >> Preventive Medicine and Hygienics submitted time 2023-05-11 Cooperative journals: 《中国全科医学》
Abstract： Background The surgical protocols and prognosis of esophageal squamous cell carcinoma（ESCC） patients influenced by the status of lymph node metastasis. It is necessary to identify risk factors that can predict lymph node metastasis to assist in clinical treatment. Objective To investigate the predict value of tumor budding（TB）and tumor-infiltrating lymphocytes（TILs）on lymph node metastasis（LNM）in patients with ESCC. Methods A total of 124 patients with ESCC who underwent radical resection and retained paraffin-embedded specimens in the Affiliated People's Hospital of Ningbo University from January 2013 to March 2022 were selected as the research subjects. The light microscopy and CK5/6 immunohistochemical staining were used to evaluate the amount of TB and density of TILs. Multivariate Logistic regression analysis was used to explore the influencing factors of lymph node metastasis in patients with ESCC and the receiver operating characteristic（ROC）curve was plotted to investigate the predictive value of TB and TILs for lymph node metastasis in patients with ESCC. Results Multivariate Logistic regression analysis showed that TB（OR=20.078，P<0.001），TILs（OR=0.218，P=0.008），and intravascular tumor thrombus（OR=28.609，P<0.001）were influencing factors for lymph node metastasis. The area under ROC curve（AUC）for TB and TILs to predict lymph node metastasis in patients with ESCC was 0.835〔95%CI（0.763，0.907）〕and 0.656〔95%CI（0.558，0.753）〕，respectively. Conclusions High-grade TB and low-density TILs were influencing factors for lymph node metastasis，TB grade and density of TILs has good diagnostic efficacy in predicting lymph node metastasis in patients with ESCC.
Subjects: Psychology >> Experimental Psychology Subjects: Psychology >> Psychological Measurement submitted time 2024-03-04
Abstract： Statistical power is one of the key indicators for assessing the robustness and replicability of research results. However, the standardization and completeness of calculating and reporting statistical power in event-related potential studies still need improvement. This paper aims to provide researchers with references for calculating and reporting statistical power during the design or preregistration of research protocols at various stages of event-related potential studies by summarizing the influencing factors, methods, and application examples of statistical power in such studies.
Peer Review Status:
Awaiting Review
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Self-esteem, as a core individual variable, has a long-standing inverse relationship with materialism. However, some studies have found that people with high self-esteem have higher materialistic orientation than those with low self-esteem, which contradicts previous research. In this connection, researchers need to rethink the relationship between these two variables. The heterogeneity hypothesis of high self-esteem holds that there are secure high self-esteem and fragile high self-esteem in high self-esteem groups, which may guide our understanding of this contradictory relationship. Therefore, the purpose of this study was to explore whether materialistic orientation was associated with different sub-types of high self-esteem, that is, that high self-esteem is heterogeneous, and to explore whether the relationship would change under self-threat situations. The results of study 1 indicated that the relationship between high fragile self-esteem and materialism was positive, while the relationship between high secure self-esteem and materialism was negative. The materialism of people with high fragile self-esteem was significantly higher than those with high secure self-esteem. The results of study 2 suggested that attractiveness threat moderated the relationship between heterogeneous high self-esteem and materialism. Specifically, in the attractive threat scenarios, materialism of secure high self-esteem was low, while materialism of fragile high self-esteem was high. In the non-attractive threat situation, the difference in materialism measures between them was insignificant. This finding was further replicated in study 3 where intellectual threat moderated the relationship between heterogeneous high self-esteem and implicit materialism. Notably, in the context of an intellectual threat, implicit materialism of the secure high self-esteem group was low, while implicit materialism of the fragile high self-esteem group was high. In the non-intellectual threat situation, the difference in implicit materialism scores was not significant. Therefore, from the perspective of heterogeneous high self-esteem, this study essentially proved the low materialism level of those with secure high self-esteem and high materialism level of those with fragile high self-esteem. It signifies that the two conclusions of previous studies are reasonable. If there exists a greater number of secure high self-esteem individuals among a population of high self-esteem persons, the relationship between high self-esteem and materialism is negative. On the contrary, if there is a greater number of fragile high self-esteem individuals, the relationship is positive, thereby solving the puzzle of the contradictory relationship between high self-esteem and materialism. Furthermore, this study can urge educators to pay more attention to the cultivation of children's secure high self-esteem rather than unquestioningly cultivating high self-esteem. To delve deeper into the impact of high self-esteem on materialism orientation, three studies were conducted. In study 1, 420 college students from 4 universities were surveyed by questionnaire to explore the correlation between heterogeneous high self-esteem and materialism. Study 2 was aimed to verify the causal relationship, and used attractiveness threat to self-esteem to investigate whether the attractiveness threat played a moderating role in the relationship between different types of high self-esteem and materialism where participants with fragile high self-esteem and secure high self-esteem were randomly assigned either to the attractiveness threat group or the control group. They were asked to compare their own attractiveness to the most and the least attractive images of the same sex selected from pre-test, respectively. Study 3 used intellectual threat as a form of self-threat priming and measured materialism at the implicit level where heterogeneous high self-esteem participants were randomly assigned to the intellectual threat group or the control group. The former completed 13 difficult questions from Raven's Progressive Matrices and received negative feedback, while the latter completed 13 simple questions from Raven's Progressive Matrices and received positive feedback.
Subjects: Materials Science >> Materials Science (General) submitted time 2023-03-18 Cooperative journals: 《材料研究学报》
Abstract： Star shaped block copolymer POSS-(PMMA-b-PS)8 was synthesized by a two step process of atom transfer radical polymerization (ATRP) with eight functionalized polyhedral oligomeric silisesquioxane POSS-(Cl)8 as core and poly(methyl methacrylate-b-polystyrene) as arm. The POSS-(PMMA-b-PS)8 was then sulfonation treated to produce hybrid polymer POSS-(PMMA-b-SPS)8, which was finally used as the polymer matrix for making proton exchange membranes (PEMs). The examination of conductivity as function of relative humidity for PEMs of high and low hydration status respectively indicated that with longer SPS block length exhibited higher proton conductivity for the PEMs of low hydration status with the same λ i.e. the number of water molecular coupled to sulfonic acid groups. TGA analysis showed that two kinds of PEM all exhibited higher water retention capacity and higher initial decomposition temperature. A well-connected ionic domains in PEM with longer SPS block could be observed by transmis-sion electron microscopy (TEM) and atomic force microscopy (AFM). The features of molecules motion of chain segments and spins relaxation time T2 for the PEMs of low hydration status were analyzed by low field nuclear magnetic resonance, and it is found that the well connected ionic domains could be observed also in the PEMs with longer SPS block, which exhibited higher proton spin-diffusion coefficient, therewith higher proton conductivity by low relative humidity.
Subjects: Biology >> Zoology submitted time 2017-10-11 Cooperative journals: 《动物营养学报》
Abstract：肠道既是机体营养物质消化吸收的主要场所，也是防御肠道微生物感染的先天性屏障，肠道健康是机体正常生长发育的关键。微小RNA(miRNAs)是基因转录后调控的重要因子。本文主要对肠道miRNAs表达情况，miRNAs在肠道细胞中的增殖、分化、凋亡，miRNAs在营养代谢、肠道屏障功能、肠道相关疾病进程调控中的作用以及肠道对外源miRNAs摄取等方面的研究进行综述，以期为相关研究的开展提供参考。
Subjects: Biology >> Zoology submitted time 2017-10-11 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲粮中添加卵黄抗体对断奶仔猪生长性能、血清生化指标、肠道形态及肠道微生物菌群的影响。试验选取160头（25±1）日龄“杜×长×大”断奶仔猪，分为4个组，每个组4个重复，每个重复10头猪。各组分别饲喂以下4种饲粮：基础饲粮（对照组）、基础饲粮+0.4 kg/t硫酸黏杆菌素（抗生素组）、基础饲粮+1.0 kg/t卵黄抗体（卵黄抗体组）、基础饲粮+0.2 kg/t硫酸黏杆菌素+0.5 kg/t卵黄抗体（联用组）。试验期共计28 d。结果表明：1）与对照组相比，卵黄抗体组显著提高了断奶仔猪平均日增重(P＜0.05)，显著降低了断奶仔猪料重比和腹泻率(P＜0.05)，断奶仔猪平均日采食量无显著差异（P＞0.05）。与抗生素组相比，卵黄抗体组断奶仔猪生长性能无显著差异(P＞0.05)，两者表现出相近的使用效果。2）与对照组相比，卵黄抗体组显著提高了断奶仔猪血清中总蛋白、白蛋白的含量(P＜0.05)。3）与对照组相比，卵黄抗体组显著增加了断奶仔猪回肠绒毛高度和绒隐比(P＜0.05)，断奶仔猪十二指肠和空肠的绒毛高度、隐窝深度和绒隐比无显著差异(P＞0.05)。4）与对照组相比，卵黄抗体组显著降低了断奶仔猪回肠、盲肠中大肠杆菌数量(P＜0.05)，显著增加了断奶仔猪回肠、盲肠中的乳酸杆菌数量(P＜0.05)。综上所述，饲粮中添加卵黄抗体能显著改善断奶仔猪生长性能，增强仔猪免疫力，提高肠道健康水平，促进有益菌生长，与抗生素有相近的使用效果，是很有发展潜力的抗生素替代品之一。
Subjects: Biology >> Botany >> Applied botany submitted time 2019-02-25 Cooperative journals: 《广西植物》
Abstract：采用 HPLC 法，分析测定一年生罂粟植株体开花后不同生育期根、茎、叶、果壳中蒂巴因含量变化，通过研究罂粟体内蒂巴因的变化规律和水氮耦合对蒂巴因的影响，为合理开发和管理这一特种药源植物提供依据。结果显示：一年生罂粟植株体蒂巴因含量的变化范围在果壳中为 1.81%～4.54%，成熟期达到最高；叶片中为 0.30%～0.68%，膨大后期最高，采收期最低；根中为 0.03～0.28%，膨大前期最高，采收期最低；茎秆中为 0.23%～0.60%，呈递减趋势，采收期最低，茎上、中、下部的蒂巴因含量的变化范围分别为 0.42%～0.97%、0.15%～0.60%、0.13%～0.37%。滴灌量和施氮量对一年生罂粟果壳中蒂巴因含量的影响差异显著罂粟壳质量最佳的水氮偶合条件为 I130Ｎ14，即滴灌量为 130 m3·(667 m2)-1，施氮量为 14kg·(667 m2)-1时，蒂巴因含量达最高。
Subjects: Biology >> Botany >> Applied botany submitted time 2019-02-25 Cooperative journals: 《广西植物》
Abstract：长柄双花木 ( Disanthus cercidifolius var. longipes ) 是一种仅分布于我国东南地区的珍稀濒危植物。为研究该物种叶性状异速生长关系和叶片资源利用策略及其随发育阶段和海拔梯度的变化规律，本文以分布于江西省不同海拔梯度的长柄双花木群落为研究对象，调查与分析了群落中不同发育阶段长柄双花木植株的叶片面积、叶片体积以及叶片含水量与叶片干重之间的异速关系。结果表明，不同发育阶段植株之间叶性状异速生长关系有着显著差异。成年树叶片面积的增长速度低于或等于叶片干重的增长速度，幼树、幼苗叶片面积的增长速度低于叶片干重的增长速度；成树叶片体积与叶片干重呈等速增长，幼树、幼苗叶片体积的增长速度高于叶干重的增长速度；成树叶片含水量的增长速度低于叶干重的增长速度，幼树、幼苗两性状间保持等速增长。海拔梯度对长柄双花木叶性状异速生长关系也有影响，植株叶体积和叶含水量与叶干重的异速生长指数在不同海拔间有显著性差异。在低海拔区域，叶体积与叶干重呈等速增长，叶含水量的增长速度低于叶片干重的增长速度。在高海拔区域，叶体积的生长速度低于叶干重的生长速度，叶含水量和叶片干重呈等速增长。上述结果说明长柄双花木叶片资源投资策略随着发育阶段和海拔梯度的不同发生变化。成树主要将叶生物量投资于光捕获面积和同化结构，幼树和幼苗则主要投资于维管组织的建设。由于海拔升高会引起风力增大、光强增强和土壤理化性质改变，长柄双花木在中低海拔倾向于增大叶体积以抢占资源，在高海拔倾向于加强机械组织和维管组织的建设来抵抗外界因子干扰。
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究苎麻替代不同比例苜蓿对波尔山羊生长性能、血清生化指标及养分表观消化率的影响。选择体重[（17.51±1.79） kg]相近的3月龄左右波尔山羊羔羊75只，采用单因子试验设计，随机分为5组，每组5个重复，每个重复3只羊。对照组饲喂基础饲粮，4个试验组分别饲喂以苎麻等量替代基础饲粮中25%（试验Ⅰ组）、50%（试验Ⅱ组）、75%（试验Ⅲ组）和100%（试验Ⅳ组）苜蓿的试验饲粮。预试期15 d，正试期75 d。于正试期第60天开始对试验羔羊进行为期4 d的消化代谢试验，收集羔羊粪便，在试验结束当天采集血液样品。结果显示：1）苎麻的粗蛋白质、粗脂肪、钙、中性洗涤纤维、酸性洗涤纤维和粗灰分的含量均高于苜蓿。2）试验Ⅰ组、试验Ⅱ组和试验Ⅲ组山羊的平均日增重与对照组相比分别下降了1.93%、6.16%和20.74%，差异不显著（P>0.05)；试验Ⅳ组山羊的平均日增重与对照组和试验Ⅰ组相比分别降低了27.38%和25.96%，差异显著（P0.05)；各个试验组山羊血清中游离三碘甲状原氨酸含量较对照组有不同程度的下降，其中试验Ⅱ组、试验Ⅲ组和试验Ⅳ组与对照组的差异达到显著水平（P0.05），但试验Ⅳ组钙的表观消化率与对照组、试验Ⅰ组、试验Ⅱ组和试验Ⅲ组相比分别降低了11.69%（P0.05）。综上，苎麻营养价值较高，可以作为优质饲草部分代替苜蓿在波尔山羊饲粮中高效利用。
Subjects: Biology >> Zoology submitted time 2017-10-11 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究母猪妊娠后期和泌乳期饲粮中添加中链脂肪酸甘油三酯（MCT）对母猪繁殖性能、血清生化指标及初乳成分的影响。试验选取120头纯种大白妊娠母猪（3~5胎），根据母猪预产期相近、胎次、体况、历史繁殖成绩均衡分布的原则分为3组，每组40个重复，每个重复1头母猪。对照组饲喂基础饲粮（含3.17%豆油），油剂组以0.6%纯油剂MCT替换基础饲粮中0.6%的豆油（含2.57%豆油），粉剂组在基础饲粮中添加0.5%微胶囊粉剂MCT。试验从母猪妊娠第85天开始至仔猪断奶结束。结果表明：1）与对照组相比，油剂组和粉剂组母猪产程分别提高了17.58%（P0.05），母猪泌乳期平均日采食量分别提高了5.92%和10.07%（P>0.05），母猪断奶后7日发情率分别提高了6.52%和4.25%（P>0.05）；饲粮中添加MCT对母猪其他繁殖性能指标无显著影响（P>0.05）。2）饲粮中添加MCT对母猪血清生化指标均无显著影响（P>0.05）。3）与对照组相比，油剂组和粉剂组母猪初乳乳脂含量分别提高了18.09%和19.09%（P>0.05），饲粮中添加MCT对母猪初乳成分均无显著影响（P>0.10）。由此可见，在母猪妊娠后期及泌乳期饲粮中添加MCT未能改善母猪的生产性能、血清生化指标及初乳成分，但添加油剂型MCT可显著缩短母猪产程。
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] This paper aims to extract the tacit knowledge from the massive literatures by constructing a two-mode complex network model. [Method/process] Through the NetworkX complex network toolkit, a two-mode complex network model was constructed based on the co-occurrence relationship of any two nodes. The direct relationship between nodes and nodes was extracted by weighting the co-occurrence relationship of nodes in the network model, calculating the topology information of the network and AP clustering. The most appropriate prediction algorithm was selected by using AUC method to evaluate the four link prediction algorithms, such as AA, JC, wAA and wJC. The tacit knowledge was predicted by the most appropriate prediction algorithm from the complex networks. [Result/conclusion] The results showed that the wAA link prediction algorithm was the optimal link prediction algorithm. The two mode complex network model, indicators and method system were effective in drug target mining in the Chemical Abstracts Service database. The next step is to try in other databases or other research fields to further verify the generality and effectiveness of the model.
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究甘氨酸亚铁对断奶仔猪生长性能、铁表观消化率及血清铁相关指标的影响。试验选取12头“杜×长×大”（28±1）日龄断奶仔猪，根据体重、健康状况等均衡分布原则分为2组，每组6个重复，每个重复1头仔猪，单个饲养于消化代谢笼。试验分为2个阶段，第1阶段：2组均饲喂缺铁基础饲粮10 d，使仔猪处于临近贫血状态；第2阶段：对照组在缺铁基础饲粮中额外添加100 mg/kg的硫酸亚铁（以铁计），试验组额外添加100 mg/kg的甘氨酸亚铁（以铁计），试验期10 d。结果表明：与添加硫酸亚铁相比，饲粮添加甘氨酸亚铁有降低仔猪料重比的趋势(P＜0.10)，降低了4.57%，但对仔猪的平均日增重、平均日采食量无显著差异(P>0.10)；饲粮添加甘氨酸亚铁能显著降低粪中的铁排出量和铁排出总量(P＜0.05)，分别降低了23.11%和22.09%；饲粮添加甘氨酸亚铁能极显著提高铁表观消化率和表观代谢率(P＜0.01)，分别提高了13.34%和22.42%；同时，饲粮添加甘氨酸亚铁能显著提高血清中的铁饱和度和血液中的铁含量(P＜0.05)。综上，甘氨酸亚铁可提高断奶仔猪的生长性能，提高血液铁含量，改善仔猪铁代谢状况，降低粪便铁排出量，是一种绿色高效的新型补铁剂。
Subjects: Library Science，Information Science >> Information Science submitted time 2023-07-09 Cooperative journals: 《中国科学院院刊》
Abstract： Biotech seed industry is a strategic core industry. Biotechnology combined with digital technology has promoted the seed industry into an intelligent era, and the breeding paradigm has changed from “experimental selection” to “computational selection”. Biotech seed industry has become a research and development intensive industry, and the market is highly concentrated, which is controlled by large multinational enterprises. The scientific and technological output of China and the United States is in the first echelon, and the number of papers and authorized patents ranks among the top two in the world. From the perspective of core competitiveness, the United States is a global leader with monopoly advantages in original basic research and key technology. China has made great progress in the application of breeding technology, but it still needs to breakthrough in basic theory research, key technology development, and high value seed product.
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲粮添加维生素E和酵母硒对黄羽肉种鸡产蛋性能、孵化性能及蛋中维生素E和硒（Se）沉积量的影响。试验采用3×3双因子设计，设3个维生素E水平（0、20、40 IU/kg）和3个Se水平（0、0.15、0.30 mg/kg)。选用32周龄快大型岭南黄羽肉鸡父母代种母鸡864只，根据产蛋率和体重一致性原则随机分成9个组，分别为VE0Se0组、VE0Se0.15组、VE0Se0.30组、VE20Se0组、VE20Se0.15组、VE20Se0.30组、VE40Se0组、VE40Se0.15组和VE40Se0.30组，每组6个重复，每个重复16只鸡。试验期8周。结果表明：1）饲粮中维生素E和Se水平对黄羽肉种鸡的体增重、平均日产蛋量、料蛋比、平均蛋重、产蛋率、破蛋率和不合格蛋率均无显著影响（P>0.05）。2）饲粮中维生素E和Se水平对黄羽肉种鸡的蛋长径、蛋短径、蛋白高度、蛋黄颜色、哈氏单位、蛋黄重、蛋壳重和蛋壳厚度均无显著影响（P>0.05）。3）饲粮中维生素E和Se水平对黄羽肉种鸡的健雏出壳重、孵化率、弱雏率和受精率均无显著影响（P>0.05）。4）饲粮中维生素E水平对黄羽肉种鸡血浆MDA含量有显著影响（P<0.05），随饲粮中维生素E水平的升高血浆MDA含量呈降低趋势，其中维生素E水平为40 IU/kg时血浆MDA含量显著低于0 IU/kg时（P<0.05）；饲粮中维生素E和Se水平对血浆MDA含量有显著交互作用（P<0.05），其中VE40Se0组的血浆MDA含量显著低于VE0Se0.15和VE0Se0.30组（P<0.05）。5）随饲粮中维生素E和Se水平的升高，黄羽肉种鸡蛋中维生素E和Se含量显著增加（P<0.05）；饲粮中维生素E和Se水平对蛋中维生素E和Se含量有显著交互作用（P<0.05）。结果提示，维生素E可以提高黄羽肉种鸡的抗氧化水平，饲粮中维生素E和Se水平可以显著影响蛋中维生素E和Se的含量；建议在无任何应激因素刺激和不使用Se缺乏地区饲料原料的情况下，黄羽肉种鸡玉米豆粕型饲粮可以不用额外添加维生素E和Se。
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究饲粮不同硒添加水平对1～21日龄岭南黄羽肉仔鸡生长性能和抗氧化性能的影响，以探讨快大型岭南黄羽肉仔鸡饲养前期的饲粮硒适宜供给量。选用1日龄健康、发育良好的快大型岭南黄羽肉公雏鸡1 200只，根据体重随机分为5个组，每组6个重复，每个重复40只鸡，试验1组（对照组）饲喂基础饲粮（硒水平为0.039 mg/kg），试验2~5组饲粮在基础饲粮中分别添加0.075、0.150、0.225和0.300 mg/kg硒，试验期21 d。结果表明：本试验条件下：1）饲粮添加0.300 mg/kg硒显著降低1～21日龄岭南黄羽肉仔鸡的末重（P<0.05），显著提高料重比（P<0.05），且0.300 mg/kg硒添加组的平均日增重显著低于其他各水平硒添加组（P<0.05）。2）与对照组相比，饲粮添加0.075和0.150 mg/kg硒显著提高21日龄岭南黄羽肉仔鸡的血浆谷胱甘肽过氧化物酶（GSH-Px）活性（P<0.05），饲粮添加0.225和0.300 mg/kg硒显著降低血浆MDA含量（P<0.05）。各水平硒添加组的红细胞GSH-Px活性均显著高于对照组（P<0.05）。3）与对照组相比，饲粮添加0.075、0.150和0.225 mg/kg硒显著提高21日龄岭南黄羽肉仔鸡的肝脏GSH-Px活性（P<0.05），0.075和0.150 mg/kg硒添加组的肝脏MDA含量显著低于对照组和0.300 mg/kg硒添加组（P<0.05）。综合考虑，为获得较好生长性能和抗氧化性能，1～21日龄岭南黄羽肉仔鸡饲粮硒适宜添加水平为0.075 mg/kg，基础饲粮中硒水平为0.039 mg/kg，则1～21日龄岭南黄羽肉仔鸡饲粮硒适宜供给量为0.114 mg/kg；以肝脏MDA含量为依据，通过非线性回归分析估测得到1～21日龄岭南黄羽肉仔鸡饲粮硒适宜供给量为0.129 mg/kg。
Subjects: Biology >> Zoology submitted time 2017-10-23 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究不同饲粮精氨酸水平对黄羽肉种鸡繁殖性能的影响。试验选用780只36周龄的黄羽肉种鸡作为试验鸡，采用单因素随机分组试验设计分成5个组（饲粮精氨酸水平分别为0.65%、0.80%、0.95%、1.10%和1.25%），每组6个重复，每个重复26只鸡。试验预试验2周，饲喂第1组饲粮；正试期10周。结果表明：饲粮中添加不同水平精氨酸对试验全期种鸡产蛋率、平均蛋重和料蛋比均没有显著影响（P>0.05）。1.10%精氨酸组的产蛋率最高，与0.65%和1.25%精氨酸组相比有提高的趋势（P0.05）。由此可见，适度添加精氨酸一定程度上能提高黄羽肉种鸡产蛋率，增强种蛋蛋壳强度和种鸡抗氧化能力。综合本试验多项指标推荐快大型黄羽肉种鸡产蛋高峰期饲粮中精氨酸水平为1.10%。
Subjects: Biology >> Zoology submitted time 2017-11-07 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究凝结芽孢杆菌对肉鸡生长性能、免疫器官指数、血清生化指标及肠道菌群的影响。选择健康的1日龄10 000只AV500肉鸡，随机分成2组，每组5个重复，每个重复1 000只鸡。对照组饲喂基础饲粮，试验组饲喂基础饲粮+300 mg/kg凝结芽孢杆菌制剂。试验期6周。结果表明：1）1～21日龄、22～42日龄试验组肉鸡死淘率显著低于对照组（P<0.05），分别下降了61.7%、52.42%；22～42日龄，试验组肉鸡的平均日增重、平均日采食量均显著高于对照组（P<0.05）。2）21日龄试验组肉鸡的脾脏指数、胸腺指数、法氏囊指数均显著高于对照组（P<0.05），而肠道指数却显著低于对照组（P<0.05）。42日龄试验组肉鸡的脾脏指数、胸腺指数均显著高于对照组（P<0.05）。3）21和42日龄试验组肉鸡血清中的丙氨酸氨基转移酶、碱性磷酸酶活性及总蛋白、球蛋白含量均显著高于对照组（P<0.05）。4）21和42日龄试验组肉鸡盲肠、回肠食糜中凝结芽孢杆菌数量均显著高于对照组（P<0.05），大肠杆菌数量均显著低于对照组（P<0.05）。由此可见，饲粮中添加凝结芽孢杆菌可抑制肠道中大肠杆菌的生长，提高免疫器官指数，降低肉鸡死淘率。
Subjects: Biology >> Zoology submitted time 2017-10-11 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究豆粕酶解发酵物对仔猪生长性能、血清指标及肠道菌群结构的影响。选用144头49日龄健康的“杜×长×大”三元杂交育肥仔猪，随机分为3组，每组6个重复，每个重复8头猪（公母各占1/2）。阴性对照组饲喂无抗生素添加的基础饲粮，抗生素对照组饲喂基础饲粮+60 g/t吉他霉素，试验组饲喂试验饲粮（基础饲粮中10%豆粕被豆粕酶解发酵物替代）。试验期为42 d。结果表明：1）试验组仔猪的末重、平均日增重、平均日采食量分别比阴性对照组高5.06%、10.07%、5.03%（P0.05）。2）试验组仔猪血清碱性磷酸酶和谷丙转氨酶活性、总抗氧化能力（T-AOC）、超氧化物歧化酶（SOD）活性均显著高于阴性对照组（P0.05）。3）试验组仔猪盲肠、大肠中乳酸杆菌数量显著高于阴性对照组和抗生素对照组（P<0.05），十二指肠中总细菌数显著低于阴性对照组和抗生素对照组（P<0.05）。综上，豆粕酶解发酵物能提高仔猪生产性能，增强机体抗氧化能力，利于乳酸杆菌在肠道内形成优势菌群，降低腹泻率，生产性能达到使用抗生素水平。
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