The Effect of Gender on Slaughtering Performance and Meat Quality in Sunite Sheep

The purpose of this experiment was to study the effect of gender on the slaughter performance and meat quality of Sunite sheep.Twelve 6-month-old Sunite rams and ewes at the same body condition were selected from the grazing herds of the Sunite Zuoqi Improvement Station Breeding Farm to determine their slaughter performance and meat quality.The slaughter test results showed that the bone quality and bone-meat ratio of the rams were significantly higher than that of the ewes (P<0.05),and the net meat quality and net meat rate of the ewes were significantly higher than that of the rams (P<0.05).The results of meat quality traits showed that the drip loss of ewes were significantly lower than that of rams (P<0.05),and the other indicators were not significantly different (P>0.05).The results of conventional nutrient composition of muscles showed that the intramuscular moisture content of the rams were significantly higher than that of the ewes (P<0.05),and the intramuscular fat content of the ewes were significantly higher than that of the rams (P<0.05),while the other indicators were not significantly different (P>0.05).The results of amino acid determination showed that the essential amino acid ratio in muscle of sunite ewes were significantly higher than that of rams (P<0.05),but there was no significant difference between the rams and ewes that formed the precursor amino acid content of meat flavor (P>0.05).Fatty acid measurement results showed that the saturated fatty acid ratio in the subcutaneous fat of rams was significantly lower than that of ewes (P<0.05).There was no significant difference in the ratio of saturated fatty acids in muscle fat and tail fat (P>0.05);The ratio of monounsaturated fatty acids in ewes tail fat was significantly higher than that of rams (P<0.05).The ratio of monounsaturated fatty acids in subcutaneous fat and intermuscular fat was not significantly different between rams and ewes (P>0.05).The ratio of polyunsaturated fatty acids in intermuscular fat of rams was significantly higher than that of ewes (P<0.05),and there was no significant difference in the content of polyunsaturated fatty acids in subcutaneous fat and tail fat (P>0.05).In summary,it showed that gender had a certain influence on the slaughter performance and meat quality of 6-month-old Sunite sheep.     

如何才能根治"瘦肉精"

主持人：前不久,上海市300多人因为食用猪肉、猪内脏而导致“瘦肉精”中毒.“瘦肉精”这个词曾经频繁出现,似乎近一两年有些淡出人们的视线.然而,上海“瘦肉精”中毒事件再次让全国的消费者紧张起来,“瘦肉精”阴魂不散,肉品安全面临着威胁.那么,这些“瘦肉精”猪肉是怎么进入市场的呢？请大家看一下记者的追踪调查.     

屠宰过程中肉品检疫和品质检验的区别及存在的问题

屠宰检疫和肉品品质检验是两个不同的概念,其主管实施部门,以及它们的职责、权利在相关法律、法规中都有明确规定,但是社会上许多人,包括领导、新闻媒体、消费者等对这些问题的认识存在一定误区,常常将注水肉、公母猪肉、中毒肉等问题都统统归咎于动物检验部门。现就我们在学习和实践过程中一些粗浅的认识提出来,供大家商讨。1屠宰检疫和肉品品质检验的关系屠宰检疫是在屠宰加工过程中对动物的胴体、头蹄内脏等携带病原和病原微生物进行检验定性;肉品品质检验主要是对屠宰加工的动物产品在出厂前就其新鲜度、水分、规格、重量进行检查;两者…     

"瘦肉精"生猪的鉴别诊断

随着生活水平的提高,人们对肉品质量和食品安全性的要求在不断提高。食品安全问题是关系到人民健康和国计民生的重大问题,而农、兽药残留(如“瘦肉精”)是目前或者可以说是今后一段时期内食品安全的突出问题之一。以下对“瘦肉精”生猪的鉴别诊断及防治措施作简要的介绍。1“瘦肉精”的危害及临床症状1.1“瘦肉精”的危害“瘦肉精”又名克伦特罗、盐酸克伦特罗、盐酸双氯醇胺、克喘素、氨哮素、氨必妥、氨双氯喘通、氨双氯醇胺。其实是人用的药品,用来治疗哮喘等疾病,有松弛支气管平滑肌的作用,它属于兴奋剂类药品,是经国家药品监督管理部门…     

疹块型猪丹毒检验技术初探

猪丹毒是由猪丹毒杆菌引起的一种传染病，这种传染病呈世界性的分布，是一种常见的人畜共忠传染病。鉴于猪的易感年龄是3～12月龄，而商品猪的屠宰又多在7～10月龄，所以在宰后的肉品检验中的检出率居各常见传染病之首位。笔者几年来在丹东市肉联厂实施监督检疫的工作过程中，     

中草药饲料添加剂对鸭各项肉品质指标的影响

研究由黄芪、当归、茯苓、槟榔等药物组成的中草药饲料添加剂与西药组、基础日粮组进行对比试验，验证中草药既是可以替代抗生素，又能改善肉品质。试验选用1日龄出壳、体质健康的仙湖三号鸭240只，单因素完全随机化试验设计，分成3组饲喂中草药组日粮、西药组日粮、基础对照组日粮，每组80只，每组设8个重复，每个重复10只鸭。试验4周末，计算中草药组、西药组、基础对照组3组试验对鸭肉粗脂肪、肌肉中氨基酸含量、鸭肉肌苷酸和肌纤维特性、鸭肉脂肪酸组成的影响。     

美系獭兔的胴体性状和肉品质特性研究

通过对20只美系獭兔屠宰性能和肉品质的测定，研究獭兔的生产性能和肉质特性及它们之间的关系，结果表明：美系獭兔5月龄的平均体重为2.533 kg,商用皮重0.410 kg,屠宰率为60.70%，右后腿重0.182 kg，体长和腰周长分别为30.69和18.04 cm；美系獭兔背最长肌和后腿肉的pH1(宰后1 h的pH)分别为6.42和6.43，pH24(宰后24 h的pH)分别为6.22和6.35,肉色L*值分别为54.66和52.67，a*值分别为12.37和9.89，b*值分别为9.06和4.08；兔肉的滴水损失、熟肉率、蒸煮损失、剪切力值、水分含量和肌内脂肪含量分别为2.06%、62.12%、30.44%、2.453 kg.f、73.60%和1.67%。商用皮重与热胴体重、体长存在极显著的正相关（P<0.01），与商用胴体重存在显著的正相关（P<0.05）。兔的体重（热胴体、商用胴〖JP2〗体、右后腿）、体型（体长和腰周长）与滴水损失、蒸煮损失呈负相关，与熟肉率、剪切力值呈正相关，但相关性都不显著（P>0.05）。     

生猪屠宰中放血不良产生因素的分析

在生猪屠宰过程中,时常发生放血不良的现象,由于肉中含血过多,使肉色不佳,易于腐败变质,缩短了肉品保鲜时间,影响了肉品卫生质量,而且上市后,往往被消费者误认为是病死猪肉,     

泰和鸡生长发育屠宰性能及肉品品质的测定

以泰和鸡为实验材料,以本地地方黄鸡为对照,研究了泰和鸡生长发育,屠宰性能及肉品品质。结果表明,泰和鸡生长速度显著慢于地方黄鸡,屠宰率偏低,而在肉品品质（肉色、嫩度等）方面却明显优于地方黄鸡。     

Effects of Yeast Culture on Growth Performance,Meat Quality and Intestinal Microflora of Broilers

The experiment was conducted to study the effects of yeast culture on growth performance, meat quality and intestinal microflora of broilers. A total of 432 1-day-old AA commercial broiler chicks with initial body weight of (41.73±0.15)g were randomly divided into 4 groups with 6 replicates per group and 18 broilers per replicate,receiving diets supplemented with 0,0.1%,0.2% and 0.3% yeast culture, respectively. The trial lasted for 42 days which was divided into two periods with 1 to 21 d and 22 to 42 d,respectively.The feed intake,body weight,death and culling rate were recorded in each period. At the end of the experiment,1 chickens in each replicate with the weight close to the average value were slaughtered after fasting for 12 h. The slaughter performance and intestinal microflora counts were determined.The results showed that compared with control group,the supplementation of 0.2% and 0.3% yeast culture significantly increased the body weight at 42 d and the average daily gain (ADG) during the whole trial (P< 0.05).The diet supplemented with 0.2% yeast culture significantly improved the ADG,decreased the F/G of broilers during 22 to 42 d (P< 0.05),and it also significantly increased the average daily feed intake (ADFI) and ADG (P< 0.05),decreased the F/G of the whole period (P< 0.05).Moreover,the supplementation of 0.2% yeast culture significantly decreased the drip loss of meat and the count of Escherichia coli (P< 0.05),and significantly increased the count of Bifidobacterium(P< 0.05). In summary, the supplementation of 0.2% yeast culture could significantly improve the growth performance and the muscle quality of broilers.The intestinal microflora in broiler cecum were effectively optimized after inclusion of yeast culture in the study.