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| 1 | 全颗粒饲料对奶牛生产性能的影响显示文摘饲料中的中性洗涤纤维(NDF)含量和饲料颗粒直径是影响瘤胃功能的重要因素。试验评估了以颗粒饲料为主的奶牛瘤胃健康情况、NDF消化率和生产性能。选取8头荷斯坦母牛(336±30 d,体重346±35 kg),随机分配到交叉重复试验组中,奶牛安置于牛栏,自由采食。试验期为3周,前两周是适应期,最后一周为数据收集期。各组饲粮原料相同,但物理形式不同,分为全混合日粮(TMR)和颗粒料(直径=8 mm)。两组间物理有效NDF(pe NDF)不同,TMR组为39.8%,颗粒料组为11.8%。在试验过程中,干物质采食量(DMI)、饮水量、瘤胃反刍时间、瘤胃温度和pH情况均记录。3周后收集粪样,确定潜在的可消化NDF总消化率(pdNDF)。每阶段结束后计算平均日增重和饲料转化率。颗粒料组的DMI、DMI/体重和饮水量更高。而两组间平均日增重和饲料转化率无显著差异。颗粒料组的瘤胃反刍时间为241 min·d-1低于TMR组的507 min·d-1。饲料的不同物理外形对瘤胃温度、瘤胃pH无显著影响。TMR组的pdNDF总消化率为90.25%高于颗粒料组的86.82%。试验结果表明,动物易接受完整的颗粒饲料,DMI较高,且反刍时间减少,但瘤胃pH无显著变化。TMR组的pdNDF消化率显著增加。尽管两组奶牛在DMI和纤维消化方面表现不同,但总体表现相似,两组饲料的保存时间与其物理形式有关。在短期内,提供能满足NDF需求的完全颗粒饲料可改善瘤胃健康状况和动物生产性能,而较长时间的数据则需要进一步试验。 | Wang J Yang M Cao M Lin Y Che L Q Duraipandiyan V Al-Dhabi N A Fang Z F Xu S Y Feng B Liu G Wu D Bonfante E Palmonari A Mammi L Canestrari G Fustini M Formigoni A | 2016 | 饲料博览2016，0，12： | 2 |
| 2 | Terahertz Semiconductor Quantum Well Devices显示文摘For eventually providing terahertz science with compact and convenient devices,terahertz (1~10THz) quantum-well photodetectors and quantum-cascade lasers are investigated.The design and projected detector performance are presented together with experimental results for several test devices,all working at photon energies below and around optical phonons.Background limited infrared performance (BLIP) operations are observed for all samples (three in total),designed for different wavelengths.BLIP temperatures of 17,13,and 12K are achieved for peak detection frequencies of 9.7THz(31μm),5.4THz(56μm),and 3.2THz(93μm),respectively.A set of THz quantum-cascade lasers with identical device parameters except for doping concentration is studied.The δ-doping density for each period varies from 3.2×1010 to 4.8×1010cm-2.We observe that the lasing threshold current density increases monotonically with doping concentration.Moreover,the measurements for devices with different cavity lengths provide evidence that the free carrier absorption causes the waveguide loss also to increase monotonically.Interestingly the observed maximum lasing temperature is best at a doping density of 3.6×1010cm-2. | Liu H C Luo H Ban D Waichter M Song C Y Wasilewski Z R Buchanan M Aers G C SpringThorpe A J Cao J C Feng S L Williams B S Hu Q | 2006 | Journal of Semiconductors2006，27，4： | 2 |
| 3 | Studies on solid-solid phase transition of polyols by infrared spectroscopy 显示文摘 | Feng H Y Liu X D He S M | 2000 | Thermochim Acta2000，348，： | 2 |
| 4 | Effect of closure of live poultry markets on poultry-to-person transmission of avian influenza A H7N9 virus: an ecological study显示文摘 | Hongjie Yu Joseph T Wu Benjamin J Cowling Qiaohong Liao Vicky J Fang Sheng Zhou Peng Wu Hang Zhou Eric H Y Lau Danhuai Guo Michael Y Ni Zhibin Peng Luzhao Feng Hui Jiang Huiming Luo Qun Li Zijian Feng Yu Wang Weizhong Yang Gabriel M Leung | 2013 | The Lancet2013，，： | 2 |
| 5 | Development and evaluation of an efficient HPLC/MS/MS method for the simultaneous determination of pseudoephedrine and cetirzine in human plasma:Plasma:application to phase-1 pharmacolinetic study显示文摘 | Ma M Feng F Sheng Y | 2007 | Cromatogr B Analyt Technol Biomed Life Sci2007，846，12： | 1 |
| 6 | Converting ceria polyhedral nanoparticles into single-crystal nanospheres 显示文摘 | Feng X D Sayle D C Wang Z L Paras M S Santora B Sutorik A C Sayle T X T Yang Y Ding Y Wang X D Her Y S | 2006 | Science2006，312，5779： | 1 |
| 7 | Global entropy solutions to the relativistic Euler equations for a class of large initial data显示文摘 | LI Y C FENG D M WANG Z J | 2005 | Zeitschrift für angewandte Mathematik und Physik2005，56，2： | 1 |
| 8 | A study of drilling uni-directionalcarbon/epoxy composites显示文摘 | Gao H Bao Y J Feng Z M | 2011 | International Journal of AbrasiveTechnology2011，4，1： | 1 |
| 9 | The effect of heat-treatment on the ultrafiltration performance of polyethersulfone(PES) hollow-fiber membranes显示文摘 | Gholarni M Simin Nasseri Feng C Y | 2003 | Desalination2003，155，3： | 1 |
| 10 | Metal-semiconductor transition in non-stoichiometric double perovskite Sr2FexMo2-xO6显示文摘 | LIU G Y RAO G H FENG X M | 2003 | Physica B2003，334，： | 1 |
| 11 | Study of different internal vapor transports for adsorption cycles with heat regeneration显示文摘 | Szarzynski S Feng Y Pons M | 1997 | Int J Refrig1997，20，6： | 1 |
| 12 | A catastrophe model for de- veloping loyalty strategies: A case study on choice I~haviour of pick-up point for online shopping显示文摘 | ttuang Y K Feng C M | 2009 | International Journal of Services Ola~rations and hffor- matics2009，4，2： | 1 |
| 13 | Effects of packing rates of cubic-shaped polyurethane foam carriers on the microbial community and the removal of organics and nitrogen in moving bed biofilm reactors 显示文摘 | Feng Q Wang Y X Wang T M | 2012 | Bioresource Technology2012，117，： | 1 |
| 14 | IrrE, a global regulator of extreme radiation resistance inDeinococcus radiodurans, enhances salt tolerance in Escherichia coli and Brassica napus显示文摘 | Pan J Wang J Zhou Z Yan Y Zhang W Lu W Ping S Dai Q Yuan M Feng B Hou X Zhang Y Ma R Liu T Feng L Wang L Chen M Lin M | 2009 | PloS One2009，4，2： | 1 |
| 15 | SalK/SalR, a two-component signal transduction system, is essential for full virulence of highly invasive Streptococcus suis serotype 2显示文摘 | Li M Wang C Feng Y | 2008 | PLoS One2008，3，5： | 1 |
| 16 | Independent and joint effects of the IL-6 and IL-10 gene polymorphisms in pulmonary tuberculo- sis among the Chinese Han population 显示文摘 | Feng F M Liu X X Sun Y H | 2014 | Genet Mol Res2014，13，3： | 1 |
| 17 | Phononic crystals andacoustic metamaterials显示文摘 | Lu M H Feng L and Chen Y F | 2009 | Materials Today2009，12，12： | 1 |
| 18 | Ligustilide prevents cognitive impairment and attenuates neurotoxicity in D-galactose induced aging mice brain显示文摘 | Li J J Zhu Q Lu Y P Zhao P Feng Z B Qian Z M | 2015 | Brain Res2015，1595，： | 1 |
| 19 | Quantitation of agmatine by liquid chromatography with laser-induced fluorescence detection 显示文摘 | ZHAO S L FENG Y Z LEBLANC M H | 2002 | Anal Chim Acta2002，470，2： | 1 |
| 20 | On a class of rearrangeable networks显示文摘 | Y M Yeh T Y Feng | 1992 | IEEE Trans Comput1992，41，11： | 1 |
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