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| 1 | 加钼或未加钼的低铜日粮对牛的铜状态、生产性能和胴体品质的长期影响显示文摘用42头7月龄安格斯公牛进行试验,测定加钼或未加钼的低铜饲粮对牛的生产性能、胴体品质和铜状态的长期影响。断奶前28d给22头犊牛注射90mg铜,断奶后,饲粮中添加铜7.5mg/kg干物质,对照组不添加铜。在获得铜后第40d末,铜的添加量降低到5mg/kg干物质,施铜期后,每组1/2牛的日粮中添加钼5mg/kg干物质。生长期持续196d随后为49d的肥育期,饲喂高浓度饲粮。试验结果表明:注射铜提高了断奶时牛的血浆铜浓度(P<0.01)。从生长期开始补加铜的牛具有较高的血浆铜含量、血浆铜蓝蛋白活性、过氧化物歧化酶(SOD)活性和肝脏铜浓度(P<0.01)。补加钼降低了未添加铜组牛生长期和肥育期血浆铜含量、血浆铜蓝蛋白和过氧化物岐化酶活性,但对加铜组的牛无影响。添加铜提高了施铜期(P<0.05)和生长期(P<0.08)牛的干物质采食量(DMI)及肥育期牛的日增重量(ADG)和饲料转化效率(G/F)。补加铜的牛的背膘厚度较薄(P<0.06),肋部眼肌面积较大(P<0.09)。研究结果证明,饲粮铜浓度可能改变牛的生产性能和胴体品质。 | Ward J D Spears J W 郭艳丽 | 1999 | 国外畜牧学(草原与牧草)1999，0，3： | 3 |
| 2 | Using genetic algorithms for concept learning显示文摘 | DE JONG K A SPEARS W M GORDON F D | 1993 | Machine Learning1993，13，： | 1 |
| 3 | Distributed, physics-based control of swarms of vehicles 显示文摘 | SPEARS W M SPEARS D F HAMANN J C | 2004 | Autonomous Robots2004，17，2： | 1 |
| 4 | Simultaneous endocardial and epicardial monophasic action potential recordings during brief periods of coronary artery ligation in the dog: influence of adrenaline, beta blockade and alpha blockade显示文摘 | TAGGART P SUTTON P M SPEAR D W | 1988 | Cardiovase Res1988，22，： | 1 |
| 5 | Comparison of eopper lysine and eopper sulfae as eopper sourees for ruminants using in vitro methods显示文摘 | Ward J D Spears J W | 1993 | Dairy Sci1993，，76： | 1 |
| 6 | An overview of physicomimetics 显示文摘 | WILLIAM M SPEARS W M SPEARS D F | 2005 | Swarm Robotics Lecture Notes in Computer Science2005，3342，： | 1 |
| 7 | Novel products from the degradation of lindane by nanoscale zero valent iron显示文摘 | Elliott D W Spear S T Zhang W X | 2005 | Abstracts of Papers of the American Chemical Society2005，229，： | 1 |
| 8 | Long-term effects of consumption of low-copper diets with or without supplemental molybdenum on copper status,performance,and carcass characteristics of cattle显示文摘 | Ward and | 1997 | Journal of Animal Science1997，，75： | 1 |
| 9 | 查看详情显示文摘 | Landen O L Boehly T R Bradley D K Braun D G Callahan D A Celliers P M Collins G W Dewald E L Divol L Glenzer S H Hamza A Hicks D G Hoffman N Izumi N Jones O S Kirkwood R K Kyrala G A Michel P Milovich J Munro D H Nikroo A Olson R E Robey H F Spears B K Th | | 0，，： | 1 |
| 10 | Boron SuppLementa tion of a Semipurified Diet for WeanLing Pigs Improves Feed Efficiency and Bone Strength Characteristics and Alters Plasma Lipid MetaboLites 显示文摘 | Armstrong A T Spears W J Crenshaw D T | 2000 | J Nutr2000，139，： | 1 |
| 11 | Effects of organic forms of zinc on growth performance, tissue zinc distribution, and immune response of wearnling pigs 显示文摘 | Van Heugten E Spears J W Kegley E B Ward J D | 2003 | Journal of Animal Science2003，81，8： | 1 |
| 12 | Using genetic algorithms for concept learning 显示文摘 | Dejong K A Spears W M Gordon D F | 1993 | Machine Learning1993，13，2： | 1 |
| 13 | Comparison of copper lysine and copper sulfate as copper sources for ruminants in vitro methods显示文摘 | Ward J D Spears J W | 1993 | Journal of Dairy Science1993，76，10： | 1 |
| 14 | Hexachlorocyclohexanes in the environment: Mechanisms of dechlorination显示文摘 | LI S ELLIOTT D W SPEAR S T | 2011 | Critical Reviews in Environmental Science and Technology2011，41，19： | 1 |
| 15 | Bioavailability of copper proteinate and copper carbonate relative to copper sulfate in cattle显示文摘 | WARD J D SPEARS J W KEKLEY E B | 1996 | Journal of Dairy Science1996，79，： | 1 |
| 16 | Biases in Particle Swarm Optimization显示文摘 | Spears W M Green D T Spears D F | 2010 | International Journal of Swarm Intelligence Research2010，2，1： | 1 |
| 17 | Physics based robots swarms for coverage problems显示文摘 | Spears D F Kerr W Spears W F | 2006 | International Journal on Intelligent Control and Systems2006，11，3： | 1 |
| 18 | Pre-eruption recharge of the Bishop magma system显示文摘 | Wark D A Hildreth W Spear F S Cherniak D J Watson E B | 2007 | Geology2007，35，： | 1 |
| 19 | Efficacy of iron methionine as resource of iron for nursing pigs显示文摘 | SCHOENHERR W D | 1992 | J Anim Sci1992，70，1： | 1 |
| 20 | Differences in copper status and copper metabolism among Angus,Simmental and Charolais cattle显示文摘 | Ward Spears and G P Gengelbach | 1995 | Journal of Animal Science1995，，73： | 1 |
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