Forty-five Chinese Holstein cows were randomly divided into 3 groups according to weight, calving days,milk yield and parity.The cows in 3 groups were fed with basic diet,basic diet pius 50 and 80g/day composite antioxidant respectively.The milk yield for each cow was monitored everyday and somatic cell count in milk was detected at fixed period.Milk samples wete collected on days 1,10,20 of official experiment. The activities of superoxide dismutase (SOD),glutathione peroxidase (GSH-Px),malondialdehyde(MDA) and catalase (CAT) in the milk were measured.Results showed that the activities of SOD,GSH-Px, and CAT in the experimental group were sifnificantly improved(P<0.05 or P<0.01),while the MDA content was sifnificantly reduced(P<0.05),the milk yield has increased(P<0.05) and SCC in milk has dropped(P<0.01) after feeding composite antioxidant. All the data suggest that composite antioxidant has positive effects on increasing the antioxidative activity of bovine mammary gland , scaveinging free radicals and enhancing the healrh level of mammary gland.

目前,猪场的产房阶段仍然存在着许多问题,如母猪产后三联症、无乳或少乳、采食量不佳及掉膘严重等状况都令管理者们头疼不已.我们之前讨论过母猪的产房之殇,非常清楚产后感染以及过分失重是引发母猪繁殖障碍的根源,但即使是非常优秀的猪场,这些问题仍然得不到有效的解决,因为仅仅通过营养调控管理的方法难以奏效,本文笔者就形成这些问题的原因及关键控制点进行分析,并简要介绍相关药物保健方案的实施和应用效果.

在母猪的整个繁殖周期中,产房阶段一直受到管理者的重视.人们关注母猪年产断奶仔猪数,提出大仔猪培养计划,这些都是非常必要的,但于此阶段,我们不仅要关注母猪的生产力和哺乳仔猪的成活率,更应关心母猪的健康状况. 生产中90％的母猪毁于产房阶段.为什么这么说?首先,母猪的分娩过程蕴藏着巨大的风险,母猪在分娩中会经历实质性的创伤、剧烈的疼痛、产仔的疲惫、无法预计的难产,甚至错误的人工护理,这些因素可能造成大量的产后感染病例.

The cow susceptible to oxidative stress because of high metabolic,oxidative stress have negative impact to health and productivity of cows,we need feed cow with antioxidant to avoid oxidative stress. The scope of this review includes oxidative stress and its harm,as well as the research and application of antioxidants.

<正>在猪场,母猪子宫内膜炎发病率在20%以上,而且更多的隐性子宫内膜炎不被发现和认识,它给母猪的生殖健康带来了严重的威胁。发生子宫内膜炎的母猪与正常母猪相比产后初配的天数和产后受孕天数相应的增加15.81天和30.67天,情期受胎率下降21.36%,平均配种受胎次数增加0.51次。同时,母猪发

在规模化猪场,母猪淘汰率不仅是一个生产指标,更是一个重要的经济指标.本文就目前母猪的淘汰现状、组成因素、经济损害、解决方法等方面进行了综述,首次提出抗母猪生殖衰老是延长母猪使用年限的有效途径,并简单介绍了有关产品开发及应用状况.

试验选用2-5胎次的长×大二元杂经产母猪100头,随机分成对照组、试验组,每组50头,研究在玉米-豆粕型日粮中添加1.2%和1.8%的保健添加剂"青春宝"对经产母猪繁殖性能的影响。结果表明:在母猪受胎率方面,试验组(94%)比对照组(82%)高;在产仔数方面,试验组比对照组多0.89头(P<0.05);窝仔猪平均断奶重方面,试验组比对照组重0.66头(P<0.01),且在相同窝仔猪平均初生重下,实验组能带来更快的生长速度和更大的窝仔猪平均断奶重;而仔猪成活率差异不大,都在95%以上。