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93篇 您的检索式:作者名="Harper T R"
    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
2Mycoplmgous 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
3Mechanisms of resistance to TRAIL-induced apoptosis in primary B cell chronic lymphocytic leukaemia显示文摘MacFarlane M Harper N Snowden R T etal 2002Oncogene2002,21,68:1
4DNA-PKcs function regulated specifically by protein phosphatase 5显示文摘WECHSLER T CHEN B P HARPER R 2004Proc Natl Acad Sci USA2004,101,5:1
5Nitrogen cyc- ling in swine production systems: Ammonia, nitrous oxide, and din-itrogen gas emissions 显示文摘Harper L A Sharpe R R Parkin T B 2004J Environ Qual2004,33,4:1
6Computer- aided molecular design with combined molecular modeling and group contribution 显示文摘Harper P M Gani R Kolar P Ishikawa T 1999Fluid Phase Equilibria1999,,:1
7Deriving 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
8Removal of arsenic from wastewater using chemical precipitation methods 显示文摘HARPER T R KINGHAM N W 1992Water Environment Research1992,64,3:1
9Ultrasonic Measure- ment of Film Thickness in Mechanical Seals显示文摘Reddyhoff T Dwyer-Joyce R Harper P 2006Sealing Tech- nology2006,,7:1
10Respiratory viruses, symptoms, and inflammatory markers in acute exacerbations and stable chronic obstructive pulmonary disease显示文摘Seemungal T Harper Owen R Rhowmik A 2001Am Respir Crit Care Med2001,164,10:1
11DNA-PKcs function regulated specifically by protein phosphatase 5 显示文摘Wechsler T Chen B P Harper R 2004Proc Natl Acad Sci USA2004,101,5:1
12A genetic algorithm for the project assignment problem显示文摘Harper P R De Senna V Vieira I T Shahani A K 2005Computers and Operations Research2005,32,:1
13Skin ban'ier protection with jojoba esters 显示文摘Oliphant T Harper R 2013JAm Acad Derrnatol2013,68,4:1
14Deriving a preference based single index measure from the UK SF-36 health survey 显示文摘Brazier J Usherwood T Harper R 1998Journal of Clinical Epiderniology1998,51,11:1
15Ultrasonic measurement of film thickness in mechanical seals 显示文摘Reddyhoff T Dwyer - Joyce R Harper P 2006Sealing Technology2006,7,:1
16Removal of arsenic from wastewater using chemical precipitation methods显示文摘Harper T R Kingham N W 1992Water Environment Research1992,64,3:1
17Academic environments in detail: Holland' s theory at the sub-discipline level显示文摘LATTUCA LISA R TERENZINI PATRICK T BETTY J HARPER 2010Research in Higher Education2010,,51:1
18Direct measurement of methane emissions from grazing and feedlot cattle 显示文摘Harper L A Denmead O T Freney J R 1999Journal of Animal Science1999,,77:1
19Gaseous emissions from anaerobic swine lagoons:ammonia,nitrous oxide,and dinitrogen gas显示文摘HARPER L A SHARPE R R PARKIN T B 2000Journal of Environmental Quality2000,29,:1
20A mass balance method for non-intrusive measurements of surface-air trace gas exchange显示文摘DENMEAD O T HARPER L A FRENEY J R 1998Atmospheric Environment1998,32,:1
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