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64篇 您的检索式:作者名="COMBS D K"
    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
2Identifi-cation of microglial signal transduction pathways me-diating a neurotoxic response to amyloidogenic frag-ments of beta-amyloid and prion proteins显示文摘Combs C K Johnson D E?Cannady S B 1999J Neu-rosci1999,19,:1
3Cloning and gene defects in microsomal triglyceride transfer protein associated with abetalipoproteinaemia显示文摘Sharp D Blinderman L Combs K A 1993Nature1993,365,:1
4Effect of Lactobacillus inoculants and forage dry matter on the fermentation and aerobic stability of ensiled mixed- crop tall fescue and meadow fescue 显示文摘Guo X S Undersander D J Combs D K 2013Journal of Dairy Science2013,,96:1
5Effects of inert rumen bulk on dry matter intake in early and midlactation cows fed diets differing in forage content 显示文摘T R Johnson D K Combs 1992Journal of Dairy Science1992,75,2:1
6Beta-Amyloid fibrils activate parallel mitogen-activated protein kinase pathways in microglia and THP1 monocytes显示文摘McDonald D R Bamberger M E Combs C K 1998J Neurosci1998,18,12:1
7Lead analysis by anti-chelate florescence polarization immunoassay显示文摘Johnson D K Combs S M Parsen J D 2002En- vironmental Science & Technology2002,36,:1
8Explaining interfirm cooperation and performance=Toward a reconciliation of predictors from the resource-based view and organizational economics显示文摘Combs J G and Ketchen D K Jr 1999Strate- gic Management Journal1999,20,9:1
9Lead analysis by anti-chelate fluorescence polarization immunoassay 显示文摘Johnson D K Combs S M Parsen J D 2002Environ Sci Technol2002,36,5:1
10Performance of lactating dairy cows fed alfalfa silage or perennial ryegrass silage显示文摘Hoffman P C Combs D K Casler M D 1998Journal of Dairy Science1998,81,1:1
11显示文摘Wang Y Q Nikitin K Mc Comb D W 2008Chemical Physics Letters2008,456,:1
12Effect of Forage to Concentrate Ratio and Intake Level on Utilization of Early Vegetative Alfalfa Silage by Dairy Cows显示文摘Mamas-Lamas G D K Combs 1991Dairy Sci1991,74,:1
13Identification of microglial signal transduction pathways mediating a neurotoxic response to amyloidogenic fragments of beta-amyloid and pfion proteins显示文摘Combs C K Johnson D E Cannady S B 1999J Neurosci1999,19,:1
14Effects of forage particle size,forage source,and grain fermentability on performance and ruminal pH in midlactation cows显示文摘KRAUSE K M COMBS D K 2003Journal of Dairy Science2003,86,4:1
15Executive function performance and trauma exposure in a community sample of children 显示文摘De Prince A P Weinzied K M Combs M D 2009Child Abuse Negl2009,33,6:1
16Effects of forage particle size,foragesource,and grain fermentability on performance and ruminal pHin midlactation cows显示文摘Krause K M Combs D K 2003Dairy Sci2003,86,:1
17Effects of forage to concentrate ratio and intake level on utilization of early vegetative alfalfa silage by dairy cows 显示文摘Llamas-Lamas G Combs D K 1991J Dairy Sci1991,74,:1
18Effects of forage par- ticle size, forage source, and grain fermentability on performance and ruminal pH in midlactation cows 显示文摘KRAUSE K M COMBS D K 2003Journal of Dairy Science2003,86,4:1
19Effects of corn particle size and source on performance of Lactating cows fed direct-Cut grass-legume forage显示文摘Reis R B San Emeterio F Combs K D 2001Dairy Sci2001,84,:1
20Effects of forage particle size, forage source, and grain fermentability on performance and ruminal pH in midlactation cows显示文摘Kranse K Combs D 2003Journal of Dairy Science2003,86,4:1
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