Subjects: Library Science，Information Science >> Library Science submitted time 2023-10-08
Abstract： IFLA is concentrating on the leading and promoting of the development of the global librarianship all the time. On the end of 2022, IFLA Annual Report 2021 has been released. The report takes “the global voice of the library and information profession” as the theme, and presents a summary view from four aspects: strengthening the global voice of libraries, inspiring and enhancing professional practice, connecting and empowering the field, optimising our organisation. From the analysis of the main contents of IFLA Annual Report 2021, this paper provides the corresponding enlightenment for the future development and integrating into the world stage, and they are: strengthening the social responsibility of library, presenting more expertise of library service, enhancing the connections of libraries, and continually improving librarian's skills and advantages.
Subjects: Psychology >> Educational Psychology submitted time 2023-09-27
Abstract： Reading is important for children’s future academic success. Clarifying the mechanisms underlying reading ability has been a heated issue in reading research for decades. Most previous studies have focused solely on reading comprehension but scarcely paid attention to the mechanisms underlying reading fluency throughout elementary school. Reading fluency at the text level has been acknowledged as one of the indicators of children’s overall reading competence. Therefore, the present study aimed to clarify the shareability and specificity of the mechanisms underlying Chinese children’s reading comprehension and reading fluency across different developmental stages.
We recruited a total of 416 Chinese children in grades 2, 4 and 6 (lower, middle and upper stages) of elementary school and were then followed up for half a year. In the fall semester (Time 1), a series of tasks, including general cognitive ability; working memory; phonological, orthographic and morphological awareness; rapid automatized naming (RAN); word recognition accuracy; word recognition fluency and vocabulary knowledge, were administered. In the second or spring semester (Time 2), reading comprehension and reading fluency were administered. Three mediation models were fitted to the data with T1 morphological awareness and RAN as predictors, T1 word recognition accuracy, word recognition fluency, and vocabulary knowledge as mediators and T2 reading comprehension and reading fluency as outcomes. The remaining variables were controlled in all the three models.
Results indicated that morphological awareness and RAN significantly predicted reading comprehension and reading fluency at T2 via word recognition accuracy among children in the lower stage after controlling for the effects of T1 general cognitive ability, T1 working memory and T1 phonological and orthographic awareness. The mediating effect of T1 word recognition fluency in the contribution of T1 RAN to T2 reading fluency was also significant. However, in the middle and upper stages, the indirect effects of T1 morphological awareness and T1 RAN on T2 reading comprehension were not significant; for T2 reading fluency, the mediating role of T1 word recognition accuracy in the effect of T1 morphological awareness was significant in both stages, but the mediated role of T1 word recognition fluency was only significant in the middle stage. Moreover, T1 RAN contributed to it via T1 word recognition accuracy and fluency.
These findings attest to both the shareability and specificity in the mechanisms underlying reading comprehension and reading fluency across different developmental stages. These findings suggest that reading fluency should be incorporated as a legitimate index of children’s reading ability. They further imply that the developmental stages require consideration when exploring the mechanisms underlying the effects of morphological awareness and RAN on reading abilities (comprehension and fluency). This study provides empirical evidence for understanding the science of reading development among Chinese children and has important implications for future reading research and educational intervention.
Subjects: Library Science，Information Science >> Library Science submitted time 2023-08-26 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] In the maker era, the universitylibrary should extend service antennae and innovate services in the base of maker space, and strongly cultivate college students' innovative qualities and entrepreneurial activities, so that we can reconstruct the library's value system and competitive advantage.[Method/process]Based on the development status and policy environment of university librarymaker space at home and abroad, this paper demonstrates the six core functionsof maker spaces in the aspects of knowledge innovationaggregation communication, scientific innovation inquiry learning, innovation and entrepreneurship education, creative project incubation, innovative information sharing,maker literacy training,etc., and puts forward the thinking and suggestions on the construction, management, operation and cooperation of maker space.[Result/conclusion]Exploringfunction transformation and service innovation by takinglibrary maker spaceas the main line, is the starting point for the library to embedininnovative talentssystem comprehensively, fully and amain, and is also one of the main ways to enhance the core value and position advantage.
Subjects: Library Science，Information Science >> Library Science submitted time 2023-08-26 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] The transformation of library space is the focus of the current theoretical research and practice. With the change of the information technology environment and readers' demand, the library is forced to re-examine itself and seek new development opportunities and living space.[Method/process] Based on the statistical cases of the spatial transformation of university libraries at home and abroad, this paper sums up the existing problems and the practical ways of the transformation of the library space, and puts forward the prospect of the new form of the future spatial change of the library.[Result/conclusion] The innovation of library has become the main melody. The maker spaces is a recipe development and social innovation culture to boost the talent library reengineering. As for the future development of the university library, it will transform or change considering its own conditions. which is driven by the development of the times, and is the only way which must be passed.
Subjects: Library Science，Information Science >> Library Science submitted time 2023-07-26 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] Through concluding and rethinking of the origin and status of domestic and foreign university libraries' space transformation, the paper could provide some examples and references for the domestic university libraries in the process of space transformation.[Method/process] On the basis of analyzing the origin and status of domestic and foreign university libraries' space transformation, and concluding the restricting factors of concepts, scales and standards in process of space transformation, and finally the paper indicates some accesses of space transformation.[Result/conclusion] The paper takes the third era library as the spirit of university libraries' space transformation, promotes the construction and practice of active space, drives the innovative talents cultivating, and in the end, releases the value and efficiency of space totally.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] By summarizing and commenting on the transformation of multimedia space and new space service in library, this paper exchanges with the library carrying out the transformation of multimedia space and provides reference. [Method/process] This paper discusses the practice, effect and service innovation of the video and audio appreciation space in the library of Shenyang Normal University, and puts forward the enlightenment of the innovation service of the reconstructed space. [Result/conclusion] Space transformation is the inevitable requirement of the transformation and development of university library, and it is a feasible transformation and development road to promote the flow of collection resources, improve the interaction of group reading, dig deep into the connotation of audio-visual resources, and cultivate the comprehensive quality of readers.
Subjects: Library Science，Information Science >> Information Science submitted time 2023-04-01 Cooperative journals: 《图书情报工作》
Abstract： [Purpose/significance] Space transformation has become the only way for the transformation and development of university libraries. New functional experience space is one of the core values of libraries. [Method/process] Based on the elaboration of the connotation and characteristics of the new functional experience space, this paper introduced the construction of the experience space in domestic university libraries, and took the construction and service of the new functional experience space in the library of Shenyang Normal University as an example to put forward in-depth thinking on the construction and service of the new functional experience space. [Result/conclusion] Resource service, space service and people-oriented service have become the characteristics of the times of university library services. It is necessary to create a new type of skill experience space for libraries of any type of universities and professional colleges.
Subjects: Psychology >> Developmental Psychology submitted time 2023-03-28 Cooperative journals: 《心理科学进展》
Abstract： The auditory channel is disabled for people who are deaf and hard of hearing, so they have to rely heavily on visual language — lip-reading and sign language — to develop their reading ability. Lip-reading can help deaf and hard-of-hearing people to form phonological representation, develop vocabulary knowledge, and promote word reading and reading comprehension. Oral and written language processing activates sign language, which affects all levels of reading ability for people who are deaf and hard of hearing. Future research should explore the role of reading skills such as phonological awareness and vocabulary knowledge in the effect of visual language on reading ability, and develop a theoretical model that explains the mechanisms underlying reading acquisition by visual language for Chinese people who are deaf and hard of hearing.
Subjects: Psychology >> Social Psychology submitted time 2023-03-27 Cooperative journals: 《心理学报》
Abstract： Implicit learning is integral to human cognition. It occurs during the learning phase (online periods) and the offline interval after the learning phase (offline periods). The process during the offline periods is referred to as consolidation, which means stabilization or enhancement of a memory trace even without additional practice after the initial acquisition. Some studies have preliminarily explored the effect of sleep on the consolidation of perceptual and motor sequences in implicit learning. However, these studies have failed to achieve a complete separation of motor sequences and perceptual sequences, thus leaving open the question of whether the sequence type moderates the effects of sleep on the consolidation of implicit sequence learning. In addition, previous studies of explicit learning have found that sequences with long length and high complexity were more likely to benefit from sleep than simple sequences, showing a sleep-based offline consolidation effect. Therefore, the question of whether the effect of sleep on offline consolidation of implicit learning of perceptual and motor sequences is moderated by sequence complexity remains unresolved. The present study addressed these issues through three experiments applying different sequence length levels and complexities using a modified version of the Serial Reaction Time (SRT) task, which allows independent manipulation of perceptual and motor sequences. Participants were instructed to press the corresponding key as quickly and accurately as possible according to which color of the target square was the same as that of the surrounding square. In the perceptual sequence group, the target square color followed a sequence, but the finger response orders were randomly assigned. The opposite was true for the motor sequence group. Subsequently, a prediction test was used to estimate the amount of possible explicit knowledge. Experiment 1 used a short six-element sequence with lower complexity and showed a more robust offline consolidation effect in the motor sequence group compared to the perceptual sequence group. However, sleep does not promote the offline consolidation of both sequences. In Experiment 2, a more complex sequence (sequence length 11) was used. The results showed that participants implicitly learned the motor sequence. In the motor sequence group, participants with sleep performed a better offline consolidation effect than those without sleep. However, participants neither implicitly acquired the sequence nor showed an offline consolidation effect in the perceptual sequence group. Participants performed a small or non-significant perceptual sequence learning effect in Experiments 1 and 2. Based on this result, the sleep-related offline consolidation of the perceptual sequence was further examined using a more simple sequence of length 4 in Experiment 3. The results showed that participants exhibited improvements in the performance of perceptual sequences learning, but no offline consolidation effect was observed in either group. The combined results of the three experiments showed that sleep does not promote the offline consolidation of perceptual sequences, regardless of the degree of difficulty. For motor sequences, the sequence learning effect significantly increased following sleep but not after waking when the sequence length was long and structural complexity was high. However, sleep-related offline improvements were absent when the sequence length was short. In conclusion, these results indicated that the offline consolidation of implicit sequence knowledge based on sleep is modulated by sequence type and sequence complexity.
Subjects: Psychology >> Cognitive Psychology submitted time 2022-06-07
Abstract：
Implicit learning is integral to human cognition. It occurs during the learning phase (online periods) and the offline interval after the learning phase (offline periods). The process during the offline periods is referred to as consolidation, which means stabilization or enhancement of a memory trace even without additional practice after the initial acquisition. Some studies have preliminarily explored the effect of sleep on the consolidation of perceptual and motor sequences in implicit learning. However, these studies have failed to achieve a complete separation of motor sequences and perceptual sequences, thus leaving open the question of whether the sequence type moderates the effects of sleep on the consolidation of implicit sequence learning. In addition, previous studies of explicit learning have found that sequences with long length and high complexity were more likely to benefit from sleep than simple sequences, showing a sleep-based offline consolidation effect. Therefore, the question of whether the effect of sleep on offline consolidation of implicit learning of perceptual and motor sequences is moderated by sequence complexity remains unresolved.
The present study addressed these issues through three experiments applying different sequence length levels and complexities using a modified version of the Serial Reaction Time (SRT) task, which allows independent manipulation of perceptual and motor sequences. Participants were instructed to press the corresponding key as quickly and accurately as possible according to which color of the target square was the same as that of the surrounding square. In the perceptual sequence group, the target square color followed a sequence, but the finger response orders were randomly assigned. The opposite was true for the motor sequence group. Subsequently, a prediction test was used to estimate the amount of possible explicit knowledge.
Experiment 1 used a short six-element sequence with lower complexity and showed a more robust offline consolidation effect in the motor sequence group compared to the perceptual sequence group. However, sleep does not promote the offline consolidation of both sequences. In Experiment 2, a more complex sequence (sequence length 11) was used. The results showed that participants implicitly learned the motor sequence. In the motor sequence group, participants with sleep performed a better offline consolidation effect than those without sleep. However, participants neither implicitly acquired the sequence nor showed an offline consolidation effect in the perceptual sequence group. Participants performed a small perceptual sequence learning effect in Experiment 1 or 2. Based on this result, the sleep-related offline consolidation of the perceptual sequence was further examined using a more simple sequence of length 4 in Experiment 3. The results showed that participants exhibited improvements in the performance of perceptual sequences learning, but no offline consolidation effect was observed in either group.
The combined results of the three experiments showed that sleep does not promote the offline consolidation of perceptual sequences, regardless of the degree of difficulty. For motor sequences, the sequence learning effect significantly increased following sleep but not after waking when the sequence length was long and structural complexity was high. However, sleep-related offline improvements were absent when the sequence length was short. In conclusion, these results indicated that the offline consolidation of implicit sequence knowledge based on sleep is modulated by sequence type and sequence complexity.
Peer Review Status:
Awaiting Review
Subjects: Biology >> Botany >> Applied botany submitted time 2021-07-20 Cooperative journals: 《广西植物》
Abstract： Plant species can adapt to heterogeneous habitats through variations in functional traits. For the plants with different growth forms, how to adjust their phenotypes to adapt to the environment has been one of the core topics in ecology. To clarify the response mechanisms of plant species with different growth forms to heterogeneous habitats in south subtropical forests, we measured a total of 8 functional traits involving 4 structural traits (leaf thickness, leaf length/width ratio, leaf dry matter content and leaf specific leaf area) and 4 stoichiometric traits (leaf N concentration, leaf P concentration, 13C and 15N) of 5 dominant trees (2 canopy species and 3 understory species) and their diameter at breast height, in 27 quadrats (20 m × 20 m) at different elevations and convexity along three mountain ridges within the 20-hm2 lower subtropical evergreen broad-leaved forest plot at Dinghu Mountain in Guangdong Province. We analyzed and compared the differences in responses of the canopy and understory species to different elevations and convexity in terms of functional traits. The results were as follows: (1) There existed some leaf functional traits in each tree species that were significantly correlated with altitude, but for convexity, only the leaf area of Cryptocarya chinensis was positively correlated with convexity and the leaf nitrogen content of Blastus cochinchinensis was negatively correlated with convexity. (2) Specific leaf area, leaf thickness and 15N were generally more responsive to elevation, while leaf length/width ratio and leaf dry matter content were less responsive. (3) There were significant differences in specific leaf area, leaf dry matter content and leaf N concentration between canopy and understory tree species in heterogeneous habitats. Compared with canopy tree species, understory tree species had lower leaf thickness, leaf dry matter content and 13C. Moreover, canopy and understory species responded to elevation and convexity to different extents, with understory species having more functional traits with significant differences in different types of habitats. The results indicate that the degree of response to the environment varied greatly between plants with different growth forms, i.e., the dominant understory tree species had greater plasticity in the heterogeneous habitats than the dominant canopy species in the forest plot. In addition, specific leaf area, leaf thickness and 15N are important and effective traits indicating plant adaptation and responses to the environment in the lower subtropical evergreen broad-leaved forest.
Subjects: Psychology >> Educational Psychology submitted time 2020-01-10
Abstract： The auditory channel is disabled for people who are deaf and hard of hearing, so they have to rely heavily on visual language — lip-reading and sign language — to develop their reading ability. Lip-reading can help deaf and hard-of-hearing people to form phonological representation, develop vocabulary knowledge, and promote word reading and reading comprehension. Oral and written language processing activates sign language, which affects all levels of reading ability for people who are deaf and hard of hearing. Future research should explore the role of reading skills such as phonological awareness and vocabulary knowledge in the effect of visual language on reading ability, and develop a theoretical model that explains the mechanisms underlying reading acquisition by visual language for Chinese people who are deaf and hard of hearing.
Peer Review Status:Awaiting Review
Subjects: Psychology >> Cognitive Psychology submitted time 2019-05-13
Abstract： " Vocabulary knowledge is one of the most important predictors of reading comprehension. According to the DVC (decoding, vocabulary, comprehension) reading skill triangle model (Perfetti, 2010), reading comprehension is dependent on knowing the meanings of words being read. At the same time, readers can infer the meanings of unfamiliar words encountered in reading. Therefore, a reciprocal relationship may exist between vocabulary knowledge and reading comprehension, which is not documented in previous research. The aim of the present study is to examine the relation between vocabulary knowledge and reading comprehension in different grades of elementary school. A total of 399 students from first, third and fifth grades were tested on vocabulary knowledge and reading comprehension tasks at two time points over one year, along with phonological awareness, morphological awareness and nonverbal reasoning at Time 1 (the fall semester in grade 1, 3 and 5) as control variables. A cross-lagged model was used to investigate the relation between vocabulary and reading comprehension in each grade span. The results showed that, after controlling for phonological awareness, morphological awareness, and nonverbal reasoning, the relation between vocabulary and comprehension varied in different developmental stages. Vocabulary knowledge did not significantly predict later reading comprehension in primary grades (grade 1 to grade 2). Bidirectional predictive relation was found between vocabulary knowledge and reading comprehension in middle grades (grade 3 to grade 4). Vocabulary knowledge in grade 5 did not predict later reading comprehension in grade 6, while reading comprehension in grade 5 significantly predicted later vocabulary knowledge in grade 6. The results support reading stage theory (Chall, 1983) and supplement the DVC reading skill triangle model (Perfetti, 2010). The relation between vocabulary knowledge and reading comprehension among Chinese elementary children changes over time. The primary grades are in the stage of “learning to read”, children’s vocabulary knowledge and reading comprehension are mainly affected by the basic cognitive and linguistic skills. The reciprocal relationship between vocabulary knowledge and reading comprehension is evident in middle grades. The enrichment of vocabulary knowledge enables children to read skilled, and the comprehension of texts can also help children learn new words from texts. Reading comprehension plays an increasingly important role in vocabulary development from middle to upper elementary grades. These findings have implications for reading instruction in Chinese at different developmental stages.
Subjects: Biology >> Zoology submitted time 2018-12-25 Cooperative journals: 《动物营养学报》
Abstract：锌是动物机体所需的重要微量元素，在机体内多种生理活动中都发挥着重要的作用。肠道既是营养物质消化吸收的主要场所，又是阻止饲料与外界环境中有害物质侵入机体的一道天然屏障。大量研究显示，氧化锌可影响动物肠道屏障，促进肠道功能的正常发挥，但也存在使用药理剂量氧化锌污染环境的问题。本文就氧化锌与新型氧化锌(纳米氧化锌、蒙脱石-氧化锌、包被氧化锌等)对断奶仔猪肠道机械屏障、生物屏障、免疫屏障的影响进行综述，为未来研究新型氧化锌在幼畜中的利用提供一定的理论参考。
Subjects: Biology >> Zoology submitted time 2018-12-24 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在研究不同锌源对新生犊牛生长性能、血清激素及免疫指标的影响。试验选取36头新生荷斯坦母犊牛，随机分成3组，每组12头。对照组无添加，试验组分别每日每头添加457 mg蛋氨酸锌和104 mg氧化锌（相当于80 mg锌），蛋氨酸锌和氧化锌混合到牛奶中进行饲喂。试验进行至犊牛生后14 d结束。犊牛4日龄时添加开食料，每天记录犊牛采食量和腹泻情况，试验开始和结束时测量犊牛体高、体斜长、胸围和体重；试验结束时采集犊牛血液样品，测定血清中免疫球蛋白和激素含量。结果表明：1）与对照组相比，添加蛋氨酸锌显著提高了犊牛平均日增重（P0.05）。2）与对照组相比，添加氧化锌和蛋氨酸锌均可显著降低犊牛血清中胰岛素的含量（P0.05）。综上所述，给新生犊牛补充蛋氨酸锌可以有效促进犊牛生长，降低腹泻率；而补充氧化锌则有助于提高犊牛机体免疫功能。
Subjects: Biology >> Zoology submitted time 2018-12-20 Cooperative journals: 《动物营养学报》
Abstract：本试验旨在制备高纯度和特异性的牛奶乳铁蛋白多克隆抗体，为鉴定并定量检测牛奶样品中及奶牛乳腺组织中合成的乳铁蛋白提供试验材料。选用4只健康新西兰大白兔，初次免疫乳铁蛋白4周后进行加强免疫，每2周加强免疫1次，待血清达到抗体效价后，对兔进行心脏采血并分离血清，利用饱和硫酸铵法和蛋白A树脂纯化抗体，十二烷基硫酸钠-聚丙烯酰胺凝胶电泳（SDS-PAGE）和免疫印迹（Western-blot）法分别用于鉴定纯化后抗体的纯度和特异性。测定纯化后抗体效价，并绘制抗体抑制曲线。最后利用所得抗体对市售液态奶、奶牛乳腺组织匀浆液、奶粉样品中的乳铁蛋白进行定量检测。结果表明，本试验制备的兔抗牛乳铁蛋白多克隆抗体纯度较高、特异性较强，抗体浓度为11.02 mg/mL，效价达到1:128 000；采用该抗体测定的乳腺组织样品中乳铁蛋白浓度为16.13 μg/g，液态奶中接近于0 μg/g，奶粉中为5.28 μg/g。总之，本试验采用经过饱和硫酸铵法和蛋白A树脂2步纯化后得到了纯度较高、特异性较强的兔抗牛乳铁蛋白多克隆抗体，可以用于牛奶等产品的乳铁蛋白鉴定。
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-06-19 Cooperative journals: 《计算机应用研究》
Abstract： To solve the problem of clustering of platform resources in C2 organization, firstly, each element in process of decision-making entity configuration is defined, then the work load are defined by two aspects as inside workload and outside workload. The root mean square (RMS) of work load are established as the objective function of configuration model, and platform scheduling scheme is taken as the input information, global updating rule based ant colony algorithm is applied to solve this problem. Finally, the method are verified and analyzed by simulation example, results show that a greater clustering scheme are obtained by this method, and it has advantages over traditional methods in terms of clustering results and convergence speed.
Subjects: Computer Science >> Integration Theory of Computer Science submitted time 2018-05-18 Cooperative journals: 《计算机应用研究》
Abstract： In order to deal with the complexity and uncertainty of battlefield environment, the research on adaptive adjustment of command and control structure has become a hotspot. The basic entity and command and control structure of army organization are introduced. The method of decision-making entity’s load measurement is given. And, the optimization model of adaptive adjustment of command and control structure is established under two kinds of battlefield condition respectively. Then, artificial bee colony algorithm is used to solve this optimization problem. The concrete steps and process of the artificial bee colony algorithm are given. Finally, the case simulation is carried out. The adjustment method based on the artificial bee colony algorithm has obtained a good effect of the adjustment of command and control structure, which proves the feasibility of the artificial bee colony algorithm in adapting and adjusting the command and control structure.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2017-12-07 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To investigate the effect of the biofeedback in regulating the myoelectric activities of the masseter muscles. Methods Twenty orthodontic patients aged from 10 to 14 years with Angle Class II malocclusion, retrusive mandible, and an ANB angle >6�were enrolled in this study. The muscular activities of the anterior temporal muscle and the masseter muscle were evaluated before, during, and after biofeedback treatment by assessing the average integrated electromyogram and temporal/masseter (T/M) ratio in the clenching status. Results The patients' myoelectric activities of the anterior temporal muscle was significantly increased after biofeedback treatment (P<0.05). The patients' T/M ratio in the clenching status was increased after the treatment (1.76�.46 before treatment, 4.71�.03 immediately after treatment, and 2.57�.07 at 1day after treatment; t=4.86, P<0.05). Conclusion Biofeedback treatment can regulate the activities of the anterior temporal and masseter muscles and increase the T/M ratio in the clenching status.
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硒源对泌乳中期荷斯坦奶牛生产性能、抗氧化性能及营养物质表观消化率的影响。试验选取45头产奶量、胎次、泌乳日龄相近的健康中国荷斯坦奶牛，随机分成3组，每组15头。对照组饲喂不添加硒的基础饲粮，无机硒（SS）组饲喂基础饲粮+0.3 mg/kg亚硒酸钠，有机硒（SO）组饲喂基础饲粮+0.3 mg/kg蛋氨酸硒羟基类似物。试验期91 d，其中预试期7 d，正试期84 d。结果表明：1）饲粮中添加硒对奶牛的干物质采食量、产奶量及乳成分没有显著影响（P>0.05）。2）与对照组相比，SO组血清总抗氧化能力和谷胱甘肽过氧化物酶活性显著升高（P0.05）。3）各组中性洗涤纤维、酸性洗涤纤维和干物质的表观消化率差异不显著（P>0.05）。与对照组相比，SO组有机物、粗蛋白质及粗脂肪的表观消化率显著提高（P0.05）。综上所述，饲粮添加不同硒源对泌乳中期荷斯坦奶牛的生产性能没有影响，但与对照组相比，硒添加组的抗氧化性能和营养物质的表观消化率提高，而且SO组的效果明显优于SS组。
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