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215篇 您的检索式:作者名="Fang D N"
    题名 作者 年代 出处 被引量
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
2Femtosecond laser fabrica-ted fiber bragg grating in microfiber for refractive index sensing显示文摘Fang X Liao C R Wang D N 2010Optics Letters2010,35,7:1
3Projection micro-stereolithography using digital Micro-mirror dynamic mask 显示文摘Sun C Fang N D M Wu 2005Sensors and Actuators A2005,121,:1
4显示文摘Feng X Fang D N Soh A K 2003Mechanics of Materials2003,,35:1
5Probiotics and immune health显示文摘Fang Y N Polk D B 2011Wolters Kluwer Health2011,,27:1
6Non linear constitutive relations for magnetostrictive materials显示文摘Wan Y P Fang D N Hwang K C 2003International Journal of Non-Linear Mechanics2003,38,7:1
7Finite element modeling of mechanical properties of 3D five-directional rectangu- lar braided composites 显示文摘Li D S Fang D N Jiang N 2011Composites Part B: Engineering2011,42,6:1
8Virtual Machining Lab for Knowledge Learning and Skills Training显示文摘Fang X D Luo S Lee N J 1998Computer Applications in Engineering Education1998,6,2:1
9Glutathione metabolism and its implications for health显示文摘Wu G Y Fang Y Z Turner N D 2004J Nutr2004,134,:1
10A screw dislocation interacting with an interfacial crack in two dissimilar piezoelectric media 显示文摘Soh A K Liu J X Fang D N 2002Physica Status Solidi(b)2002,232,2:1
11Effect of temperature on bending properties and failure mechanism of three dimensional braided composite显示文摘L1 D S FANG D N ZHANG G B 2012Materials and Design2012,41,:1
12Predicting the nonlinear response and failure of 3 D braided composites显示文摘Zeng T Fang D N Ma L 2004Materials letters2004,58,:1
13Creep and stress rup ture behavior of an advanced silicon nitrid显示文摘MENON M N FANG H T WU D C 1994Journal o~ the A- merican Ceramic Society1994,77,5:1
14Synergistic effects of tungsten and phosphorus on catalytic cracking of butene to propene over HZSM-5显示文摘Xue N H Nie L Fang D M 2009Applied Catalysis A: General2009,352,:1
15Regional Environmental Efficiency Evaluation in China:Analysis Based on the Super-SBM Model with Undesirable Outputs显示文摘Li H Fang K N Yang W Wang D Hong X X 2013Mathematical and Computer Modelling2013,,38:1
16Uniaxial local buckling strength of periodic lattice composites显示文摘Fan H L Jin F N Fang D N 2009Materials and Design2009,30,:1
17Cbl-b,a RING-type E3 ubiquitinligase,targets phosphatidylinositol 3-kinase for ubiquitination in Tcells显示文摘Fang D Wang HY Fang N 2001J Biol Chem2001,276,7:1
18Tensile properties and fracture mechanism of A1-Mg alloy subjected to equal channel angular pressing 显示文摘Fang D R Duan Q Q Zhao N Q 2007Materials Science & Engineerin A2007,459,12:1
19Anatomy of apparent seasonal variations from GPS derived site position time se- ries 显示文摘Dong D N Fang P Bock Y 2002Journal of Geophysical Research2002,107,4:1
20Femtosecond laser fabricated fiber Bragg grating in microfiber for refractive index sensing显示文摘X Fang C R Liao D N Wang 2011Opt Lett2011,35,7:1
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