摘要
选用 4只安装有永久性瘤胃瘘管的 4月龄杂交一代 (无角陶赛特×小尾寒羊 )羯羊 ,采用拉丁方设计 ,研究 4种铜添加水平 ( 0 ,6 ,12和 18mg·kg-1)和 4种硫添加水平 ( 0 ,0 0 5 % ,0 10 %和 0 15 % )在高钼 ( 12 5 5mg·kg-1)条件下对绵羊铜代谢的影响。所用铜源为碱式氯化铜 ,硫为硫酸钠 ,钼为钼酸钠。结果表明 :随着日粮中碱式氯化铜添加水平的提高 ,绵羊血浆中的铜水平显著升高 (P <0 0 5 ) ,三氯乙酸 (TCA)可溶解铜水平也显著提高(P <0 0 1) ,而TCA不溶性铜、血浆铜蓝蛋白 (Cp)和铜锌超氧化物歧化酶 (CuZn SOD)活性则无显著变化 ;随着硫添加水平的升高 ,TCA溶解铜显著下降 (P <0 0 5 ) ,TCA不溶铜显著提高 (P <0 0 1) ,血浆铜、Cp和CuZn SOD活性变化不明显 ;日粮中添加不同水平的铜和硫对铜的表观消化率、羊草干物质消失率及中性洗涤纤维 (NDF)消失率没有显著影响。结果说明碱式氯化铜是绵羊比较理想的无机饲料铜源。
Four wethers (Poll Dorset×Small Tail Han yang) with permanent rumen fistula were used to determine effect of tri basic copper chloride supplement on copper metabolism in sheep fed high molybdenum diet in Latin square design. The experiments were conducted in sheep fed with high molybdenum diet contained molybdenum (Mo) 12 55? mg·kg -1 DM. Copper(Cu), as tri basic copper chloride, was added at doses of 0, 6, 12, 18?mg·kg -1 DM, and S, as sodium sulfate(S), was provided at 0 , 0 05%, 0 10%, 0 15% DM respectively. The results showed that plasma Cu and trichloroacetic acid (TCA) soluble Cu increased ( P <0 05)and there were no effects on TCA insoluble Cu and cuproenzyme activities as dietary Cu increased. TCA soluble Cu decreased ( P <0 05)and TCA insoluble Cu increased ( P <0 01). However, there was no effect on plasma Cu with increasing dietary S. In addition, there were no significant differences in apparent digestibility of Cu, disappearance of dry matter and neutral detergent fiber (NDF) of Chinese wildrye with dietary supplementation of Cu and S. These results suggest that tri basic copper chloride may be satisfactory inorganic copper source for sheep.
出处
《中国农业大学学报》
CAS
CSCD
北大核心
2004年第3期31-35,共5页
Journal of China Agricultural University
基金
国家高技术发展规划资助项目 ( 2 0 0 2AA2 4 2 0 4 1)
关键词
碱式氯化铜
硫
铜代谢
铜源
绵羊
tri-basic copper chloride
sulfur
copper metabolism
copper source
sheep
