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239篇 您的检索式:作者名="Harper R J"
    题名 作者 年代 出处 被引量
1过瘤胃蛋氨酸、赖氨酸和组氨酸对泌乳奶牛生产性能的影响显示文摘试验旨在研究饲料中单独添加或综合添加过瘤胃(RP)蛋氨酸、赖氨酸和组氨酸及可代谢蛋白(MP)对泌乳后期奶牛生产性能的影响。试验选取72头荷斯坦奶牛,随机分为6组,试验期9周。奶牛随机分配到6个试验组中,2周作为1个变量周期:MPA组,根据美国国家科学研究委员会(2001)标准,在饲料中添加调节MP到243 g·d-1;MPD组,不添加MP,MP含量低于标准量54 g·d-1;MPDM组,在MPD组的基础上加入RP蛋氨酸;MPDL组,在MPD组的基础上加入RP赖氨酸;MPDH组,在MPD组的基础上加入组氨酸;MPDMLH组,在MPD组的基础上加入RP蛋氨酸、RP赖氨酸和RP组氨酸。试验结果表明,与MPA组对比,MPD组的干物质采食量(DMI)、产奶量、乳成分(乳脂肪、乳蛋白和乳糖)及能量校正的牛乳(ECM)、ECM饲料利用效率、牛奶和血浆中的N均降低。在MPD基础上补充RP赖氨酸可使乳蛋白率、血浆中葡萄糖浓度增加,且牛奶中N元素含量有增加的趋势;补充RP组氨酸可使DMI、牛奶浓缩蛋白增加,且乳脂肪、乳蛋白和ECM显著增加;补充3种RP氨基酸时,增加了乳蛋白率,使DMI和乳脂率有增加趋势,也提高了乳脂肪、乳蛋白含量和ECM及ECM饲料利用效率。与MPA相比,MPD组牛奶中N的含量有降低趋势,且血浆中必需氨基酸(除赖氨酸和蛋氨酸)浓度均降低。补充RP赖氨酸、RP蛋氨酸和RP组氨酸提高了血浆中蛋氨酸(除MPDM组)、赖氨酸和组氨酸浓度。饲喂MPD的奶牛血红蛋白浓度降低,血浆生长素含量高于MPA组。MPD组牛奶中总饱和脂肪酸浓度有高于MPA和MPDMLH组的趋势。MPD组的多元不饱和脂肪、牛奶中奇链与支链脂肪酸含量与MPA组相比,有降低趋势。试验结果表明,对于饲料中缺乏MP的奶牛,在饲料中添加组氨酸和添加3种RP氨基酸(赖氨酸、蛋氨酸和组氨酸)均有提高牛奶产量和牛奶组分含量的可能性。Giallongo F Harper M T Oh J Lopes J C Lapierre H Patton R A Parys C Shinzato I Hristov A N 2016饲料博览2016,0,7:4
2Life-history concepts andthepopulation biology of clonal organisms 显示文摘Saekvilh Hamilton N R Schmid B Harper J L 1987Proceeding of Royal Society London B1987,232,:1
3EGFR and cancer prognosis显示文摘Nicholson R I Gee J M Harper M E 2001Eur J Cancer2001,37,4:1
4A calcium-dependent protein kinase with a regulatory domain similar to calmodulin显示文摘Harper J F Sussman M R Schaller G E 1991Science1991,252,:1
5The p21CDK-interacting protein Gip1 is a potent inhibitor of G1cyclin-dependent kinases显示文摘 Adami G R Wei N 1993Cell1993,75,:1
6Investigations Toward Formaldehyde-free Finishes显示文摘Frick J G and Harper R J Jr 1982T R J1982,52,2:1
7Mycoplmgous grazing and food preference of Proisotoma minuta ( Collembola: Isotomidae) and Onychiurus encarpatus (Collembola: Onychiuridae) 显示文摘Lartey R T Curl E E Peterson C M Harper J D 1989Environmental Entomology1989,,18:1
8Interference in dune annual: spatial pattern and neighborhood effects显示文摘Mack R N Harper J L 1977J Ecol1977,65,2:1
9Using soil and climatic data to estimate the performance of trees,carbon sequestration and recharge potential at the catchment scale显示文摘Harper R J Smetten K R J Tomlinson R J 2005Australian Journal Experimental Agriculture2005,45,:1
10Heparin and glomerular epithelial cell-secreted heparin-like species inhibit mesangial cell proliferation显示文摘 Hoover R L Harper P A 1985Am J Pathol1985,120,:1
11Characterization of the inhibition of K+ absorption in oats roots by salicylic acid显示文摘Harper J R Balke N E 1981Plant Physiol1981,68,:1
12The potential of greenhouse sinks to underwrite improved land management显示文摘Harper R J Beck A C Ritson P 2007Ecological Engineering2007,29,:1
13Deriving apreference - based single index from the UK SF - 36 Health Survey显示文摘BRAZIER J USHERWOOD T HARPER R 1998J Clin Epidemiol1998,51,11:1
14Corneal vascularization in the Florida Manatee and three- dimensional reconstruction of vessels 显示文摘Harper J Y Samuelson D A Reep R L 2004Vet Ophthalmol2004,8,:1
15The p21 Cdk-interacting protein Cipl is a potent inhibitor of G1 cyclin-dependent kinases显示文摘Harper J W Adami G R Wei N 1993Cell1993,75,4:1
16Validating the SF-36 health survey questionnaire: new outcome measure for primary care 显示文摘Brazier J E Harper R Jones N M 1992BMJ1992,305,6846:1
17The preparation of an immunoglobulinamyloglucosidase conjugate and its quantitation by an enzyme-cycling assay显示文摘Harper J R Orengo A 1981Anal Biochem1981,113,1:1
18Effects of ingestion of disproportionate amounts of amino acids显示文摘Harper A E Benevenga N J Wohlheuter R M 1970Physiol Rev1970,50,:1
19Closure of secundum atrial septal defect with the Amplatzer septal occluder: techniques and problems 显示文摘Harper R W Mottram P M McGaw D J 2002Catheter Cardiovasc Interv2002,57,:1
20The Arabidopsis CDPK-SnRK superfamily of protein kinases显示文摘Hrabak E M Chan C W Gribskov M Harper J F Choi J H Halford N KUdla J Luan S Nimmo H G Sussman M R Thomas M Walker-simmons K Zhu J K Harmon A C 2003Plant Physiology2003,132,:1
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