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全球化和气候变化正不断地改变着病原微生物的生态系统,使得病原体的种类、传播方式及其爆发的频次趋于复杂多变。病原体的这些新特性带来了前所未有的挑战,尤其是在动物健康和兽医公共卫生领域。病毒、细菌、寄生虫和真菌等微生物不仅能引起多种兽病,影响动物的福祉和生产效率,而且还可能间接影响人类健康和食品安全,例如通过食物链传播或新型病原体的出现。深入探究病原微生物对动物防疫的挑战与应对策略,并提出科学有效的解决方案,促进我国养殖业安全发展。 相似文献
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~~《牛肉质量分级》由农业部颁布并已由中国标准出版社出版@彭增起$南京农业大学!江苏南京210095 相似文献
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肉鸡规模养殖场是指在适合养殖肉鸡的地区,按照集约化和规模化饲养要求,建立具有一定规模、养殖规范和严格管理的肉鸡养殖基地,在基地内由若干个业主进行标准化养殖。最近几年,肉鸡养殖已经成为农民群众发家致富的重要途径之一,本文主要结合实际情况,就肉鸡规模养殖场健康养殖关键技术进行了分析,希望通过本次研究对更好地促进肉鸡规模化饲养质量提升有一定助益。 相似文献
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随着人们生活水平的不断提高,对牛肉质量的要求也越来越高,肉牛养殖场所生产的牛肉要满足消费者对营养、风味、安全和健康等方面的需求,因此,生产高档牛肉是肉牛养殖场获得较高经济效益的关键。由于影响牛肉质量的因素较多,并且各因素间还相互影响,因而通过分析影响牛肉质量的因素有助于采取有效的措施提高牛肉质量。 相似文献
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曹兵海谈我国肉牛产业存在的问题及应对策略 总被引:1,自引:0,他引:1
在饲料成本高企的形势下,草食家畜牛、羊、兔今年会继续呈现比较好的发展形势。本期3位专家的分析有助于指导农户明确养殖方向,把握利润预期。下期将对我国水产、特种养殖等行业进行报道,敬请继续关注! 相似文献
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[目的]为研究金川牦牛与中国西门塔尔牛牛肉品质差异。[方法]试验选取成年的金川牦牛和中国西门塔尔牛进行屠宰性能比较分析。其测定指标包括:脂肪、水分、蛋白质、pH值、剪切力、蒸煮损失、压力失水率、肉色(L^*、a^*和b^*值)、氨基酸、脂肪酸。[结果]结果表明:金川牦牛和中国西门塔尔牛的辣椒条、外脊和小黄瓜条在脂肪、蛋白质、L^*值、a^*值、氨基酸、脂肪酸具有显著性差异(P<0.05),在水分、pH值、剪切力、蒸煮损失、b^*值无显著性差异(P>0.05)。[结论]金川牦牛与中国西门塔尔牛牛肉品质相比具有较高的脂肪、蛋白质、必须氨基酸总量、不饱和脂肪酸、L^*和b^*值,其营养价值更高、肉色更加鲜红易被消费者接受。 相似文献
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[目的]为从分子水平探究隆林黄牛的遗传多样性及父系起源。[方法]利用PCR测序及生物信息方法,对20头隆林黄牛公牛的2个Y-SNPs标记(UTY-19和ZFY-10)进行多态性检测。[结果]结果显示,20头隆林黄牛中有14头为Y3单倍型组(70%),有6头牛为Y2单倍型组(30%),Y染色体单倍型多样度为0.4421±0.0875,表明隆林牛具有丰富的Y染色体遗传多样性。[结论]隆林黄牛具有瘤牛和普通牛2个父系起源,以瘤牛父系起源为主。 相似文献
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《The Professional Animal Scientist》2002,18(2):112-119
In 1991 and 1995, National Beef Quality Audits (NBQA) benchmarked beef industry quality challenges. Face-to-face interviews identified hide defects and lack of live cattle uniformity as leading quality challenges for packers and excess external fat and lack of uniformity/ consistency as leading quality challenges for merchandisers (purveyors, retailers, and restaurateurs). For NBQA-2000, surveys replaced interviews to solicit producers and to increase packer and merchandiser opinions. Seedstock generators and cow-calf producers (n = 2,308) most frequently (P < 0.05) cited improved genetics using expected progeny differences, changed injection site location, and improved genetics using physical characterization as management adjustments made since 1991. Stocker/ backgrounders and feedlot operators (n = 740) most frequently (P < 0.05) made adjustments in injection site location, handling, and genetic types of cattle. Seedstock generators and cow-calf producers indicated that previous audits had a “strong” (18.7%) or “moderate” (57.6%) impact on management changes made since 1991 compared with 15.3% or 62.7%, respectively, for stocker/ backgrounders and feedlot operators. Packers (n = 29) and merchandisers (n = 113) indicated that past audits had a “strong” (6.9% and 9.5%, respectively) or “moderate” (55.2% and 71.8%, respectively) impact on quality/consistency improvements of cattle, carcasses, and cuts. Responses from production sectors revealed lack of live cattle uniformity, inadequate tenderness, and insufficient marbling to be the greatest (P < 0.05) quality challenges currently facing the beef industry. Merchandisers revealed insufficient marbling, lack of cut uniformity, and inadequate tenderness to be the greatest (P < 0.05) quality challenges. Results will aide in development and implementation of beef quality assurance principles and will provide added stimulus for producers to improve beef quality and consumer satisfaction. 相似文献