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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 | Effects of organic forms of zinc on growth performance,tissue zinc distribution,and immune response of weanling pigs显示文摘 | Van Heugten E T Spears J W Kegley E B | 2003 | J Anim Sci2003，81，： | 1 |
| 3 | 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 |
| 4 | Effects of dietary copper and molybdenum on copper status, cytokine production, and humoral immune response of calves 显示文摘 | Gengelbach G P Spears J W | 1998 | J Dairy Sci1998，81，12： | 1 |
| 5 | 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 |
| 6 | Effects of dietary copper and molybdenum on copper status, cytokine produc- tion,and humoral immune response of calves显示文摘 | Gengelbach G P Spears J W | 1998 | J Dairy Sci1998，81，12： | 1 |
| 7 | 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 |
| 8 | Effects of dietary copper cource and concentration on carcass characteristics and lipid and cholesterol metabolism in growing and finishing steers显示文摘 | Engle T E Spears J W Armstrong T A | 2000 | J Anim Sci2000，78，： | 1 |
| 9 | Restoration of the contact surface in the HLL Riemann solver显示文摘 | TORO E F SPRUCE M SPEARES W | 1994 | Shock Waves1994，4，1： | 1 |
| 10 | Review of the ITER project显示文摘 | SHIMOMURA Y SPEARS W | 2004 | IEEE Trans Appl Supercond2004，14，2： | 1 |
| 11 | Growth Performanee,car-cass characteristics,nutrient Digestibility and fecalodorous compounds in growing-finishing pigs fed di-ets containing hydrolyzed feather meal显示文摘 | Heugten E Spears J W | 2002 | Journal ofAnimal Science2002，80，1： | 1 |
| 12 | 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 |
| 13 | Dietary copper effects on lipid metabolism and circulating catecholamine concentrations in finishing steers显示文摘 | Engle T E Spears J W Xi L | 2000 | J Anim Sci2000，78，： | 1 |
| 14 | Restoration of the contact surface in the HLL-Riemann solver显示文摘 | Toro E F Spruce M Speares W | 1994 | Shock Waves1994，4，： | 1 |
| 15 | Dietary phosphorus and an inflammatory challenge affect performance and immune function of weanling pigs显示文摘 | Kegley E B Spears J W Auman S K | 2001 | J Anita Sci2001，79，： | 1 |
| 16 | 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 |
| 17 | Bioavailability of copper from tribasic copper chloride and copper sulfate in growing cattle 显示文摘 | SPEARS J W KEGLEY E B MULLIS L A | 2004 | Animal Feed Science and technology2004，116，1： | 1 |
| 18 | Effect of copper source (cupric citrate vs cupric sulfate) and level on growth performance and copper metabolism in pigs显示文摘 | Armstrong T A Spears J W van Heugten E | 2000 | Asian-Aus J Anim Sci2000，13，： | 1 |
| 19 | Estimated copper requirements of Angus and Simmental heifers 显示文摘 | Mullis L A Spears J W McCraw R L | 2003 | Journal of Animal Science2003，81，4： | 1 |
| 20 | Role of antioxidants and trace elements in health and immunity of transition dairy cows显示文摘 | Spears J W Weiss W P | 2008 | Vet J2008，176，： | 1 |
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