【作者】 任秀珍；

【导师】 贾玉山；

【作者基本信息】 内蒙古农业大学 ， 草业科学， 2004， 硕士

【摘要】 环境低温引起的冷应激给北方草地畜牧业造成了严重的损失，为解决这一影响畜牧业生产的难题，保证草地畜牧业的健康、稳定、持续发展，本试验对抗冷应激饲草料进行了研究。首先以乌珠穆沁育成羊和妊娠母羊为试验对象，进行了舍饲和放牧+补饲两种不同饲养方式下，抗冷应激饲草料对育成羊和妊娠母羊体重变化及羔羊出生重生产性能影响的试验。而后以妊娠母羊为试验对象，研究在放牧+补饲生产条件下，抗冷应激饲草料对绵羊血糖、二氧化碳结合力、无机离子、血清酶和一些激素的影响，探讨抗冷应激饲草料的作用机理。试验结果表明：①舍饲条件下饲喂抗冷应激饲草料无明显效果。②在放牧+补饲的条件下，抗冷应激饲草料对育成羊增重、妊娠母羊保膘和羔羊出生重有明显的促进作用。③从血糖、无机离子和激素的结果来看，抗冷应激饲草料能很好地调节绵羊血糖、无机离子和神经内分泌激素的变化，在寒冷条件下缓和应激，减少自身体内营养物质的消耗，维持正常的生理代谢。④从二氧化碳结合力和血清酶的结果可知，抗冷应激饲草料能起到缓解酸中毒和维持酸碱平衡的作用，并且降低了冷应激对细胞膜的损伤，维持了绵羊机体健康。更多还原

【Abstract】 Cold stress caused by the low environmental temperature had brought great loss to the grassland animal husbandry in North.The study of composite feed for resisting cold stress was made in this experiment，in order to solve the problem on cold stress and ensure the heathy,stable and sustained development of grassland stock farming. First,Ujimqin adult sheep and pregnant ewe were used to study the effects of composite feed for resisting cold stress on the body weight changes of adult sheep and pregnant ewe and the baby weight.Sencond,only pregnant ewe was used to study the influences of composite feed for resisting cold stress on the glucose,carbon dioxide combining power,ions , enzymes and hormones in grazing + supplementary feeding,in order to explore the functional machanism of composite feed for resisting cold stress.The results showed that: ①There was no significant effects feeding with composite feed for resisting cold stress in pen feeding.②The composite feed for resisting cold stress could greatly promote the body weight increase of adult sheep,the baby weight and keep the body weight of pregnant ewe in grazing + supplementary feeding.③It could be seen from the results of glucose,ions and hormone that composite feed for resisting cold stress could greatly modulating the changes of them and regulating the stress in cold condition.Thus,the consumption of nutritional matters were reduced and the normal physiological metabolism were maintained.④Based on the results of carbon dioxide combining power and enzymes,as can be seen that feeding with composite feed for resisting cold stress had an effect on reducing acid intoxication and keeping the balance between acid and alkali,meanwhile,decreasing the injure of cold stress to cell membrane and keeping sheep heathy.更多还原