共查询到20条相似文献，搜索用时 804 毫秒
1.
2.
3.
本试验旨在研究饲粮中添加不同微生态制剂对樱桃谷肉鸭生长性能、屠宰性能及免疫器官发育的影响.选取320羽10日龄樱桃谷肉鸭,随机分为4组,1个对照组和3个试验组,每组4个重复,每个重复20羽.对照组饲喂基础饲粮,3个试验组分别饲喂在基础饲粮的基础上添加50 mg/kg芽孢杆菌混合物(试验Ⅰ组)、1000mg/kg芽孢杆菌与寡糖混合物(试验Ⅱ组)、1 000 mg/kg芽孢杆菌与链球菌混合物(试验Ⅲ组)的试验饲粮.试验期33 d.结果表明:试验Ⅱ组和试验Ⅲ组的平均日增重显著或极显著高于对照组(P＜0.05或P＜0.01).试验Ⅲ组的平均日采食量、料重比显著低于试验Ⅰ组和对照组(P＜0.05).各试验组的存活率显著或极显著高于对照组(P ＜0.05或P＜0.01).与对照组相比,试验Ⅲ组的腹脂率显著下降(P＜0.05),法氏囊指数显著升高(P＜0.05).由此得出,饲粮中添加芽孢杆菌与寡糖混合物和芽孢杆菌与链球菌混合物均能提高樱桃谷肉鸭的生长性能;此外,饲粮中添加芽孢杆菌与链球菌混合物还可提高樱桃谷肉鸭的胴体品质和免疫机能. 相似文献
4.
《上海畜牧兽医通讯》2017,(5)
本试验旨在研究饲粮中添加益生芽孢杆菌对樱桃谷肉鸭生产性能、屠宰性能及经济效益的影响。选取600羽2周龄樱桃谷肉鸭,随机分为3组,每组4个重复,每个重复50羽。对照组饲喂基础日粮,2个试验组分别在基础日粮中添加枯草芽孢杆菌(枯草组)、复合芽孢杆菌(复合组),饲养至42日龄。结果表明:枯草组、复合组日采食量极显著低于对照组(P0.01),复合组料重比显著低于对照组(P0.05),复合组全净膛率显著高于对照组(P0.05),枯草组、复合组鸭经济效益分别增加0.45、0.53元/羽。由此可见,在樱桃谷肉鸭饲粮中添加枯草芽孢杆菌和复合芽孢杆菌均能有效减少日采食、降低料重比、提高成活率、改善屠宰性能,经济效益明显。 相似文献
5.
<正>为探讨大蒜素对樱桃谷商品肉鸭生产性能、屠宰性能的影响效果,研究将大蒜素添加于樱桃谷肉鸭日粮中,进行全程饲养试验,以期为樱桃谷肉鸭生产实践和饲养配套技术提供科学依据,现报道如下。1材料与方法 1.1试验动物与试验设计樱桃谷肉鸭由北京南郊鸭业有限公司提供。试验将600只健康、体重无显著差异、出壳1日龄的樱桃谷肉鸭随机分为对照组、试验l组、试验2组,每组设4个重复,每重复50只,进行饲养试验。对照组饲喂玉米-豆粕型基础日粮,试验l,2组分别在每吨基础日粮中添加50,100 g大蒜素。大蒜素为市售25%饲用添加剂。基础日粮主要由玉米、豆粕、豆类蛋白 相似文献
6.
文章旨在研究地顶孢霉培养物对樱桃谷肉鸭生长性能、血液抗氧化指标及免疫器官指数的影响,试验将健康的1日龄樱桃谷肉雏鸭1200只随机分成4组,每组6个重复,每个重复50只。对照组饲喂基础日粮,试验Ⅰ、Ⅱ、Ⅲ组分别在基础日粮中添加0.1%、0.2%和0.3%的地顶孢霉培养物,试验期40 d。结果表明：日粮中添加0.2%、0.3%地顶孢霉培养物可显著提高樱桃谷鸭出栏体重,降低料重比|添加地顶孢霉培养物可提高樱桃谷肉鸭抗氧化性能,试验Ⅲ组效果最佳|日粮中添加地顶孢霉培养物可显著提高胸腺指数和脾脏指数,以试验Ⅲ组效果最好。因此,地顶孢霉培养物具有促进肉鸭生长,提高肉鸭抗氧化能力及免疫力的功能。
[关键词]地顶孢霉培养物|樱桃谷肉鸭|抗氧化指标|免疫器官指数 相似文献
7.
8.
《中国家禽》2021,(7)
试验旨在研究辣椒碱对樱桃谷肉鸭生长性能、肉品质、肌肉抗氧化功能的影响。试验选择1日龄樱桃谷鸭192只,随机分为3组,每组8个重复,每个重复8只。分别饲喂基础日粮(对照组)、基础日粮+100 mg/kg辣椒碱(试验Ⅰ组)、基础日粮+300 mg/kg辣椒碱(试验Ⅱ组),试验期为42 d。结果显示:与对照组相比,添加300 mg/kg辣椒碱能显著提高樱桃谷肉鸭的采食量(P0.05)、日增重(P0.05),改善樱桃谷肉鸭的生长性能;显著降低14日龄樱桃谷鸭血清中葡萄糖、14日龄与42日龄胆固醇浓度(P0.05);添加辣椒碱能显著降低樱桃谷肉鸭胸肌24 h亮度值、24 h滴水损失和蒸煮损失(P0.05),显著提高24 h红度值(P0.05);此外,辣椒碱能显著提高腿肌中T-AOC能力和SOD活性(P0.05),以及胸肌中T-AOC能力和CAT活性(P0.05),显著提高樱桃谷肉鸭胸肌和腿肌的Nrf2和NQO-1 m RNA表达量(P0.05)。综上所述,饲粮中添加辣椒碱能提高樱桃谷肉鸭生长性能,改善肉品质,提高机体抗氧化能力。 相似文献
9.
《黑龙江畜牧兽医》2020,(13)
为探讨酵母培养物在肉鸭生产上的应用效果,试验选择体重一致、体况健康的1日龄樱桃谷肉鸭2 000只,随机分成A、B、C、D、E 5组,每组5个重复,每个重复80只肉鸭,A组为对照组,饲喂基础日粮,B、C、D组分别在基础日粮中添加0.3%、0.5%、1.0%的酵母培养物,E组在基础日粮能值降低12.55 MJ/kg后再加0.5%的酵母培养物,进行为期42 d的饲喂试验,通过测定肉鸭的生产性能指标和免疫器官指数,分析日粮中添加不同水平酵母培养物对樱桃谷肉鸭生产性能和免疫器官指数的影响。结果表明:日粮中添加适量酵母培养物可提高樱桃谷肉鸭的采食量、日增重及成活率,基础日粮中添加0.5%的酵母培养物可以降低料肉比,提高饲料转化率;樱桃谷肉鸭日粮中添加酵母培养物有利于肉鸭免疫器官发育,提高肉鸭免疫力;基础日粮中添加1.0%的酵母培养物有利于肉鸭法氏囊和脾脏的发育,基础日粮中添加0.5%的酵母培养物有利于肉鸭胸腺发育,即使是在减少能量的情况下,单一添加0.5%酵母培养物也可以使肉鸭各免疫器官维持较好的发育状态。说明日粮中添加酵母培养物可以提高樱桃谷肉鸭生产性能,增强机体免疫能力。 相似文献
10.
11.
12.
为了解注水鸡肉的品质变化情况,以市场购买的30只成年青脚麻鸡母鸡为素材,将其分为两组,一组为对照组,另一组对其两侧胸肌、腿肌和翅膀部位进行注水,设为试验组。对两组鸡肉品质相关指标检测研究结果显示:注水组鸡肉的重量显著增加(P<0.05),外观品质更加饱满、鲜亮、诱人,肉色显著提亮(P<0.05),剪切力、系水力、pH值、蛋白质含量、肌内脂肪含量、氨基酸含量和肌苷酸含量显著降低(P<0.05),蒸煮损失、TVB-N值、亚精胺含量、菌落总数和大肠菌群数显著升高(P<0.05);此外,在正常组中未检测出金黄色葡萄球菌,而在注水组检测到金黄色葡萄球菌。从各项指标的变化规律中可以看出,注水鸡肉无论是在营养品质还是在风味口感上都显著降低,而腐败速度以及安全风险则显著升高。 相似文献
13.
H. Korkeala T. Alanko O. Mtiki-Pettiys O. Sorvettula 《Acta veterinaria Scandinavica》1988,29(1):15-22
The effect of the pH on the boiling test was studied in 68 beef and 108 pork muscles. The pH had a significant effect on the sensory scores obtained from the boiling test. The effect was particularly pronounced in the odour of meat. In beef the odour scores remain steady for samples with a pH value under about 6.2 and start to increase rapidly in higher pH values. In pork the increase in scores appears to be linear. The odour observed in high pH meat was described by the judges as abnormal and ammonialike. In the case of meat with a high pH, the results of the boiling test at meat inspection should be interpreted with extreme caution. 相似文献
14.
15.
Amber D. Goguen Shawn J. Riley John F. Organ Brent A. Rudolph 《Human Dimensions of Wildlife》2018,23(3):197-212
An increased societal focus on wildlife as food and recent policy deliberations regarding legal markets for wild-harvested meat are encouraging wildlife managers and researchers to examine the amount, use, and distribution of meat yielded through recreational hunting. We used responses to questions on the Michigan Deer Harvest Study to estimate the maximum yield of edible venison and assess hunters’ sharing behaviors. We estimated 11,402–14,473 metric tons of edible venison were procured during the 2013 hunting season. Of hunters who harvested a deer, 85% shared their venison. Hunters who shared did so with an average of 5.6 people (SD = 4.5). Sharing occurred most frequently within tight social networks: members of hunters’ households (69%), relatives (52%), and friends, neighbors, or coworkers (50%). In the absence of legal markets, venison is distributed widely by hunters and greatly amplifies the number of people benefiting from hunting. Nonetheless, we also identified the potential breadth of exposure to disease or contaminants from wild-harvested meat. 相似文献
16.
17.
18.
江西地方品种水牛产肉性能及肉品质分析研究 总被引：3，自引：1，他引：2
对18～24月龄鄱阳湖、峡江和信丰山地3个江西地方品种水牛各3头,进行肉用性能和牛肉主要营养养分的测定分析。结果表明,水牛肌肉肉色符合标准,且无PSE肉、DFD肉产生,符合优质肉牛标准;鄱阳湖水牛的胴体重、净肉重、胴体产肉率、Fe含量、Zn含量较高,显著高于信丰山地水牛（P<0.05）;鄱阳湖水牛18种氨基酸含量除酪氨酸外均高于其它2个地方品种,其中天门冬氨酸、谷氨酸、丝氨酸、脯氨酸、丙氨酸、亮氨酸及胱氨酸含量显著高于信丰山地水牛（P<0.05）,鲜味氨基酸、甜鲜味氨基酸含量显著高于信丰山地水牛（P<0.05）;牛肉脂肪酸中花生酸含量在品种间存在显著差异（P<0.05）,而其它各种脂肪酸含量、硬脂肪酸总含量和不饱和脂肪总含量在品种间均无显著差异（P>0.05）。 相似文献
19.
P.J. Selman E. van Garderen J.A. Mol T.S.G.A.M. van den Ingh 《The Veterinary quarterly》2013,33(4):128-133
Abstract Administration of progestins in the dog may result in overproduction of growth hormone, suppression of the hypothalamic‐pituitary‐adrenocortical axis, and insulin resistance. In this paper we present a comparison of the histological findings in control dogs and dogs treated with either medroxyprogesterone acetate (MPA) or proligestone (PROL). Depot preparations of MPA or PROL were administered (SC) at 3‐week intervals in two groups of seven ovariohysterectomized beagle dogs, after which three dogs of each group were killed. After a 6‐month period without hormone treatment during which recovery was studied, the remaining dogs received five additional injections at the same interval and were subsequently killed. Tissue samples of four intact female beagle dogs served as controls. Progestin treatment resulted in atrophy of the adrenal cortex. In both MPA‐ and PROL‐treated dogs, the thickness of the combined zona fasciculata and reticularis was significantly smaller than in control animals. In the mammary glands of progestin‐treated dogs there were well developed alveoli and normal ducts adjacent to foci of hyperplastic ductular epithelium. Five dogs in each treatment group had developed benign mammary tumours which varied from simple tubular and papillary adenomas to benign complex and mixed tumours, whereas no mammary tumours were observed in the control animals. In each treatment group, steroid‐induced hepatopathy was observed in the liver of three dogs. Vacuolation of the cells of the islets of Langerhans and the epithelium of the intercalated ducts was present in two dogs of each treatment group and was only observed after the second series of progestin administrations. Incidental findings included chronic pyelonephritis, aspecific dermatitis, and mucinous dysplasia of the gall bladder. No abnormalities were found in sections of spleen, lung, brain, or pituitary gland. There were no significant differences in the frequencies of the various abnormalities between MPA‐ and PROL‐treated dogs. Our findings correspond with the clinical and biochemical results after treatment of dogs with MPA and PROL. The high incidence of mammary tumours might be associated with our recent finding that in the dog progestins induce ectopic production of growth hormone in the mammary gland. The dog might be a good model for further studies on hormonally induced breast cancers. 相似文献
20.
Laboratory and in vivo studies in primates, and serological evidence in humans, indicate that food animal oncogenic viruses show potential for causing cancer in humans. However, until fairly recently, supporting analytic epidemiologic studies have been lacking and have concentrated on lung cancer. We conducted an extensive Medline search and reviewed 60 studies investigating lung cancer risk in highly exposed workers in the meat and poultry industries. The overwhelming majority of studies of different designs (including all the cohort mortality and cancer incidence studies) indicate at least a 30% excess risk of lung cancer in meat and poultry plant workers, even after controlling for smoking. Evidence points to food animal oncogenic microorganisms as one of the main causes. This has important public health implications because the general population is also widely exposed. Studies carried out thus far have not had sufficient statistical power to investigate other potentially carcinogenic exposures within the industries. Thus, large studies that can adequately control for occupational and non-occupational confounding factors are needed, so that the possible role of food animal oncogenic viruses in the occurrence of human lung cancer can be clearly defined. 相似文献