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260篇 您的检索式:作者名="Cook R F"
    题名 作者 年代 出处 被引量
1高羊茅干草部分替代玉米和紫花苜蓿青贮饲料对奶牛消化、泌乳性能的影响显示文摘试验旨在研究高羊茅干草替代玉米或紫花苜蓿青贮对奶牛中性洗涤纤维(NDF)消化率、泌乳性能的影响。选取初产哺乳荷斯坦奶牛(产奶75±35 d)24头,经产荷斯坦奶牛(产奶68±19 d)40头,随机分成4组,共设置32个进料闸门,记录采食量。每组8个进料阀门,以1头牛为1个试验单位,每头牛试验过程中可接触8个进料闸门。试验用高羊茅干草(TF)取代玉米青贮饲料(CS)或紫花苜蓿青贮饲料(AS),试验设计为:33%AS和67%CS(空白组)、60%TF和40%AS(试验1组)、60%TF和40%CS(试验2组)、33%TF和67%CS(试验3组)。试验进行7周,前2周进行预饲。试验结果表明,各组间牛奶产量无显著差异,平均值为40.4 kg·d^(-1)。各组间牛奶中脂肪含量和浓度、蛋白质含量和浓度均无显著差异,平均值为1.58 kg·d^(-1)和3.94%、1.28 kg·d^(-1)和3.15%。与试验1组(22.1 kg·d^(-1))、试验3组(22.7 kg·d^(-1))相比,空白组的干物质摄入量最高,为24.5kg·d^(-1)。各组间总的干物质消化率无显著差异,平均值为66.2%。与试验2组(44.4%)、试验3组(45.3%)相比,空白组的NDF消化率较低,为37.8%,与试验1组(42.4%)相近。各组间奶牛体内NDF消化率(42.3%)与预估的NDF消化率(42.6%)相近。试验结果表明,饲喂高羊茅干草可提高饲料中NDF消化率,部分替代玉米和紫花苜蓿时对产奶量无显著影响,在市场价格较低时,可作为经济实用的奶牛饲料。Bender R W Lopes F Cook D E Combs D K 2016饲料博览2016,0,8:2
2Sex pheromone and visual trap interactions in mate location strategies and aggregation by host-alternating aphids in the field显示文摘Hardie J Storer J R Cook F J 1996Physiological Entomology1996,21,2:1
3Drought reconstruction for North Central China from tree rings= The value of the Palmer drought severity index显示文摘Li J B Chen F H Cook E R 2007Int J Clim2007,27,7:1
4Characteristics and genesis of epithermal gold deposits 显示文摘Cooke D R Simmons S F 2000Reviews in Economic Geology2000,13,2:1
5LX-17 comer turning显示文摘Souers P C Andreski H G Cook C FⅢ Garza R Pastrone R Phillips D Roeske F Vitello P Molitoris J D 2004Propellants Explosives and Pyrotechnics2004,29,1:1
6A Meta-Analysis of Re- sponse Rates in Web-or Intemet-Based Surveys 显示文摘Cook C Heath F Thompson R L 2000Edu- cational and Psychological Measurement2000,60,6:1
7Neutrophil- lymphocyte ratio as a prognostic factor in colorectal cancer显示文摘Walsh S R Cook E J Goulder F 2005J Surg Oncol2005,91,3:1
8Di- ameter dependent radial and tangential elastic moduli of ZnO nanowires 显示文摘Stan G Ciobanu C V Parthangal P M Cook R F 2007Nano Letters2007,7,12:1
9Understanding New Co-operative Models:An Ownership-control Rights Typology显示文摘CHADDAD F R COOK M L 2004Review of Agricultural Economics2004,26,3:1
10The mechanisms of the formation and growth of water bubbles and associated dislocation loops in synthetic quartz显示文摘McLaren A C Cook R F Hyde S T 1983Phys Chem Mineral1983,9,:1
11Corn pressive stress effect on the radial elastic modulus of oxidized Si nanowires 显示文摘Stan G Krylyuk S Davydov A V Cook R F 2010Nano Letters2010,10,6:1
12显示文摘Marshall D B Lawn B R Cook R F 1987Communications of American Ceramic Society1987,,6:1
13Low-frequency signals in long tree-ring chronologies for reconstructing past temperature variability 显示文摘Esper J Cook E R Schweingruber F H 2002Science2002,295,5563:1
14Influence of catcheelamines on gonadotropin secretion in goldfish, carasius auraius显示文摘Chang J P A F Cook R E Peter 1983Gren Comp Endocrinol1983,49,:1
15Depth-sensing indentation at macroscopic dimensions显示文摘Thurn J Morris D J Cook R F 2002J Mater Res2002,17,10:1
16Xenon purity analysis for exo-200 via mass spectrometry 显示文摘Dobi A Hall C Slutsky S Yen Y R Aharmin B Auger M Barbeau P S Benitez-Medina C Breidenbach M Cleveland B Conley R Cook J Cook S Counts I Craddock W Daniels T Davis C G Davis J Devoe R Dixit M Dolinski M J Donato K Fairbank Jr W Farine J Fierlinger P Franco D Giroux G Gornea R Graham K Gratta G Green C Hagemann C Hall K Hallman D Hargrove C Herrin S Hughes M Hodgson J Juget F Karelin A Kaufman L J Kuchenkov A Kumar K Leonard D S Lutter G Mackay D Maclellan R Marino M Mong B Montero Diez M Morgan P MUller A R Neilson R Odian A Oullivan K Piepke A Pocar A Prescott C Y Pushkin K Rivas A Rollin E Rowson P C Sabourov A Sinclair D Skarpaas K Stekhanov V Strickland V Swift M Twelker K Vuilleumier J L Vuilleumier J M Weber M Wichoski U Wodin J Wright J D Yang L 2012Nuclear Instruments and Methods in Physics Research Section A: Accelerators Spectrometers Detectors and Associated Equipment2012,675,:1
17Equine infectious anemia and equine infectious anemia virus in 2013: a review 显示文摘Cook R F Leroux C Issel C J 2013Vet Microbiol2013,167,12:1
18Understanding NewCooperative Models : An Owership Control RightsTypology 显示文摘Chaddad f R Cook M L 2004Applied Economic Perspectives and Policy2004,26,3:1
19Normalization of bone markers is associated with improved survival in patients with bone metastases from solid tumors and el crated bone resorption receiving zoledronic acid显示文摘Lipton A Cook R Saad F Major P Garnero P Terpos E 2008Cancer2008,113,:1
20Elastic modulus of low k dielectric thin films measured by load-dependent contact resonance atomic force microscopy 显示文摘Stan G King S W Cook R F 2009Jour nal of Materials Research2009,24,9:1
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