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1.
Meat quality characteristics of Bafra ram lambs slaughtered at different weights were investigated. A total of 24 lambs fattened
intensively was slaughtered at four slaughter weights of 30, 35, 40, and 45 kg. Water-holding capacity, cooking loss, tenderness,
color, as well as protein content did not vary significantly among the slaughter weight groups, although the 30-kg slaughter
weight lambs displayed the greatest postmortem pH fall in musculus longissimus dorsi (P < 0.05). As slaughter weight increased, intramuscular fat of musculus longissimus dorsi showed an increasing nutritive value
(P < 0.05), total unsaturated fatty acids/saturated fatty acids ratio (P < 0.05), and n6/n3 ratio (P < 0.05). However, atherogenic index and thrombogenic index values decreased with increasing slaughter weight, although this
effect was not significant. The effect of slaughter weight on total cholesterol was not pronounced. 相似文献
2.
Hayriye Deger Oral Toplu Ergun Omer Goksoy Ahmet Nazligul Tolga Kahraman 《Tropical animal health and production》2013,45(6):1297-1304
Meat quality characteristics of Turkish indigenous Hair goat kids reared under an extensive production system were investigated in this study. A total of 60 Hair goat kids (30 females and 30 males) were slaughtered at 3, 6, 9, and 12 months of ages. Slaughter age significantly affected meat quality characteristics. Cooking loss (P?<?0.01) and shear force value (P?<?0.001) increased with age. Meat color became darker red with increasing slaughter age (P?<?0.001). The percentage of fat of musculus (M.) semimembranosus increased with age (P?<?0.01). The percentage of saturated fatty acids was significantly higher (P?<?0.01), whereas the percentage of unsaturated fatty acids was lower (P?<?0.001) in the M. longissimus dorsi of the kids slaughtered at 3 months of age than those in the other age groups. The females had higher intramuscular fat than that in males (P?<?0.001) and meat from male kids contained a higher percentage of polyunsaturated fatty acid than that from females (P?<?0.01). In conclusion, meat from Hair kids slaughtered between 3 and 9 months of ages had better quality than those slaughtered at the other ages and also meat from male kids had better quality than those female kids slaughtered at the same age under extensive production system. 相似文献
3.
de Mello Tavares Lima Paulo da Silva Alcantara Moraes Sousa Carla Vanessa do Prado Paim Tiago Corrêa Patrícia Spoto Lanna Dante Pazzanese Duarte McManus Concepta Abdalla Adibe Luiz Louvandini Helder 《Tropical animal health and production》2019,51(4):775-780
The aim of this study was to investigate the effects of castration on carcass characteristics and fatty acid profile of visceral fat and meat from lambs. Eighteen six-month-old Santa Inês male lambs (18.9?±?2.4 kg of body weight (BW)) were used. Animals were assigned to two treatments according to their sexual condition: uncastrated (U) or castrated (C). During a 98-day experimental period, animals were kept on an Andropogon gayanus grass pasture area of 1 ha and supplemented with 200 g/animal/day of concentrate mixture. Water and mineral salt were available ad libitum. The lambs were weighed fortnightly, and at the last day of the trial, they were slaughtered for evaluation of carcass characteristics and fatty acids profile of perirenal fat and longissimus lumborum muscle samples. Castrated lambs showed higher BW than U during most part of the experiment (p?<?0.05). Fat deposition was higher in C lambs as evidenced by their increased carcass fat cover. Meat from U lambs showed lower content of C16:0 and higher polyunsaturated fatty acids (PUFA) (p?<?0.05) than that from C (U, 14.3 and C, 10.5%). Conjugated linoleic acid (CLA) content was not affected by castration (p?>?0.05) (U, 0.74 and C, 0.76%). The cis-9, cis-12 C18:2n-6 (U, 10.6 and C, 6.86%) fatty acid and the PUFA:SFA (saturated fatty acids) ratio (U, 0.36 and C, 0.25) were higher in the muscle of U lambs (p?<?0.05), indicating that the meat from U animals may provide more benefits to human health than that of C.
相似文献4.
Landim AV Cardoso MT Castanheira M Fioravanti MC Louvandini H McManus C 《Tropical animal health and production》2011,43(8):1561-1566
This study aims to investigate the effect of breed and slaughter weight on fatty the acid profile of the Longissimus dorsi muscle in lambs. Twenty-four Santa Inês (SI), 24.5 Ile de France × 0.5 Santa Inês (Ile × SI) and 12.5 Texel × 0.5 Santa Inês
(Te × SI), slaughtered at different weights (30, 35, 40, and 45 kg), were evaluated. The animals were reared with creep feeding
to weaning and were feedlot finished, receiving a diet composed of 30% hay and 70% concentrate. The analyses of fatty acids
were carried out on the Longissimus muscle of the 13th rib. The experiment was in a three by four factorial design. The total mean saturated fatty acid level
was 44.88%, with 43.30% monounsaturated fats and 1.72% polyunsaturated. The major fatty acids found included oleic (43%),
palmitic (22%), and stearic (18%). The concentration of desirable fatty acids varied from 61.56% to 66.78%, with Te × SI (66.78%)
having the highest levels (P < 0.05). The slaughter weight affected (P < 0.05) the saturated and unsaturated (both mono and poly) fatty acid profiles. The 35-kg slaughter weight showed the most
desirable fatty acid profile. The saturated myristic and stearic fatty acids decreased with an increase in the slaughter weight,
but oleic acid increased. In the conditions of the present study, the meat from Santa Ines and Texel × Santa Ines lambs had
fatty acid profiles more beneficial for human health due to the higher levels of unsaturated fatty acids. 相似文献
5.
Thirty Awassi ram lambs were used to study the effects of slaughter weight on carcass characteristics. Lambs were slaughtered at three different live weights (20, 30, and 40 kg). Empty body weight, hot and cold carcass weights and non-carcass components increased (P < 0.001) at a steady rate between all slaughter weights. Body length, leg length, maximum shoulder width, width behind shoulders and gigot width increased (P < 0.001) as slaughter weight increased from 20 to 40 kg. Linear dimensions measured on the surface of the M. Longissimus also increased (P < 0.001) with increasing slaughter weight. The ratio between width and depth of the longissimus muscle decreased (P < 0.01) at a steady rate between 20 and 40 kg indicating that the muscle increased more in depth than width. Dressing-out percentage was higher (P < 0.001) for lambs slaughtered at 30 kg live weight compared to other weights. Total lean and total bone decreased (P < 0.05) as a percent of cold carcass weight while total fat, subcutaneous and intermuscular fat percentages increased (P < 0.05) with increasing weight. Subcutaneous fat percentage was not affected by increasing body weight between 20 and 30 kg. Intermuscular fat percent was higher in all cuts except the leg where subcutaneous fat % was higher. Muscle to bone ratio increased (P < 0.001) while muscle to fat ratio decreased (P < 0.001) with increasing body weight in the four major cuts and the whole carcass. In conclusion, slaughtering Awassi ram lambs at weights up to 30 kg resulted in higher dressing-out percentage and better carcass characteristics than ram lambs slaughtered at heavier weights. 相似文献
6.
瘦肉型和脂肪型肥育猪胴体性状和肉质的比较研究 总被引：5，自引：3，他引：2
选用体重为50 kg左右的宁乡猪和三元杂交猪各4头,屠宰后对其胴体性状、肉质及肌肉氨基酸与脂肪酸组成和含量进行比较。结果表明,宁乡猪的胴体重、皮重、脂肪重、脂肪率和均膘厚均显著高于三元杂交猪,肌肉重、瘦肉率和眼肌面积显著低于三元杂交猪（P<0.05）;宁乡猪的肉色显著优于三元杂交猪（P<0.05）;贮存损失显著低于三元杂交猪（P<0.05）;三元杂交猪肌肉各氨基酸含量均高于宁乡猪（P>0.05）;宁乡猪背最长肌和半腱肌的油酸含量显著高于三元杂交猪（P<0.05）,而背最长肌硬脂酸和亚油酸含量及半腱肌亚油酸含量均显著低于三元杂交猪（P<0.05）。 相似文献
7.
本实验旨在研究闽西南黑兔及新西兰白兔的屠宰性能及肉品质,为闽西南黑兔在异地(山东省)繁育提供理论基础。选择35日龄、断奶体重(854±13)g的闽西南黑兔及断奶体重(635±18)g的新西兰白兔各20只(公、母各半),饲养管理相同,在(100±2)d全部进行屠宰,测定屠宰性能和肉品质指标。结果表明:闽西南黑兔的屠宰体重、胴体重等显著低于新西兰白兔;闽西南黑兔的背最长肌的红度值和黄度值显著高于新西兰白兔,肌肉脂肪沉积显著低于新西兰白兔;新西兰白兔的背最长肌中n-6多不饱和脂肪酸显著高于闽西南黑兔,各屠宰性能和肉品质之间没有显著的性别差异。本研究表明,相比新西兰白兔,闽西南黑兔的肌肉呈现良好的色泽,不饱和脂肪酸沉积少。 相似文献
8.
Hoa V. Ba Hyun‐Woo Seo Pil‐Nam Seong Soo‐Hyun Cho Sun‐Moon Kang Yun‐Seok Kim Sung‐Sil Moon Yong‐Min Choi Jin‐Hyoung Kim 《Animal Science Journal》2019,90(5):667-679
One‐hundred‐twenty crossbred pigs finished at 175–185 days of age were used to investigate the effects of live weights at slaughter on the meat quality, volatile flavor compounds, and sensory attributes of pork meat. Based on the live weights at slaughter, three weight groups (n = 36 per group) were classified as follows: light weight (LW: 100 kg), medium weight (MW: 110 kg), and heavy weight (HW: 120 kg). After slaughter, longissimus dorsi muscle samples were taken and used for the analyses of aforementioned parameters. The HW group had higher fat content and water holding capacity compared to the LW or MW group (p < 0.05). The HW group also showed higher levels for majority of unsaturated fatty acids and total polyunsaturated fatty acids than the LW group (p < 0.05). The slaughter weight significantly affected the amounts of 11 among the 47 flavor compounds identified. Significantly higher amounts of fatty acids oxidation‐derived flavor compounds (aldehydes) were found in the HW group than in the other groups. Noticeably, increasing slaughter weight was associated with higher sensorial scores for flavor, juiciness, and acceptance scores (p < 0.05). Based on the obtained results, 120 kg body weight is recommended as the market weight for this commercial breed without compromising the meat quality. 相似文献
9.
[目的] 研究早期断奶对藏西北绒山羊背最长肌中氨基酸和脂肪酸含量的影响。[方法] 将18只健康羔羊按照体重相近原则随机分为试验组和对照组,试验组在28日龄（D28）实施早期断奶,对照组在60日龄（D60）自然断奶,羔羊断奶后饲喂相同的代乳料至75日龄;从两组随机选取5只羔羊进行屠宰采样,对其背最长肌中氨基酸和脂肪酸指标进行测定分析。[结果] 在藏西北绒山羊背最长肌中检测出17种氨基酸,包括赖氨酸、亮氨酸等7种必需氨基酸,天冬氨酸、精氨酸等10种非必需氨基酸。两组断奶羔羊肉中总氨基酸含量、必需氨基酸含量、非必需氨基酸含量均无显著差异（P>0.05）,28日龄断奶组羔羊肉中EAA/TAA、EAA/NEAA比值显著（P<0.05）高于60日龄断奶羔羊。共检测出29种饱和脂肪酸、不饱和脂肪酸,以棕榈酸和油酸含量最高,早期断奶对羔羊肉中饱和脂肪酸含量、单不饱和脂肪酸含量以及多不饱和脂肪酸含量影响不显著（P>0.05）。[结论] 藏西北绒山羊羔羊肉中所含氨基酸和脂肪酸种类多、含量丰富,实施早期断奶、及早补充颗粒料对肉中脂肪酸和氨基酸含量无影响,且可提高EAA/TAA、EAA/NEAA比值,使其更符合FAO/WHO氨基酸评分模式;该试验可为藏西北绒山羊羔羊实施早期断奶、提高母羊的繁殖率提供参考。 相似文献
10.
V. Lind J. Berg L. O. Eik S. M. Eilertsen J. M⊘lmann M. Hersleth 《Acta Agriculturae Scandinavica, Section A - Animal Sciences》2013,63(4):230-238
Abstract With the objective of studying the effects of production systems on meat quality, 75 Norwegian White Sheep lambs were subjected to one of the following treatments: continuous grazing on a semi-natural lowland pasture until slaughtering (Control); continuous grazing followed by either stall-feeding on concentrate and grass silage or grazing ryegrass pasture for 44 or 24 days before slaughtering (Conc44, Conc24, Rye44, Rye24). Loin samples of M. longissimus dorsi including the subcutaneous fat were analysed for sensory attributes and fatty acid composition. Compared with the control group, a lower intensity of acid taste (P<0.05) and a lower content of C18:3n-6 fatty acids (P<0.001) were observed in the Conc44 group. The n-6/n-3 ratio was higher (P<0.001) in meat tested from the concentrate treatments compared to the ryegrass treatments. These findings indicate that the fattening of lambs on improved pastures or a concentrate-based diet prior to slaughter may alter meat characteristics. 相似文献
11.
试验旨在探讨不同屠宰体重对苏山猪屠宰性能、胴体性状和肉品质的影响,从而确定苏山猪最佳屠宰体重。选用60头30 kg左右的苏山猪,公母各半,随机分成A、B、C组,每组20头,平均体重分别达到90、100、110 kg时,每组选取3头公猪、3头母猪进行屠宰性能、胴体性状和肉品质测定。结果表明：随着苏山猪屠宰体重的增加,各组屠宰性能存在较大差异,A组瘦肉率为63.18%,显著高于B、C组（P<0.05）;C组板油重、肩部最厚处背膘厚、倒数第3~4肋骨处背膘厚显著高于A组（P<0.05）;3个处理组屠宰率、皮率、骨率以及脂肪率等指标无显著差异（P>0.05）;3个处理组背最长肌水分、粗蛋白质、粗脂肪无显著差异（P>0.05）,但A组的粗灰分显著高于B、C组（P<0.05）;B组肌肉L*值为43.50,显著高于C组（P<0.05）,C组pH1 h和pH24 h分别为6.40和5.83,显著（P<0.05）或极显著（P<0.01）高于A、B组。随屠宰体重增长肌肉内饱和脂肪酸和单不饱和脂肪酸呈上升趋势,多不饱和脂肪酸呈下降趋势,其中C组饱和脂肪酸显著高于A组（P<0.05）;A组总氨基酸、必需氨基酸和鲜味氨基酸均高于B、C组,但差异均未达到显著水平（P>0.05）。因此,综合考虑,苏山猪的最佳屠宰体重为90 kg左右。 相似文献
12.
沙棘果渣对育肥羔羊生长性能、器官指数、血清生化指标和肌内脂肪酸组分的影响 总被引：1，自引：0，他引：1
本试验旨在研究饲粮中添加沙棘果渣对育肥羔羊生长性能、器官指数、血清生化指标和肌内脂肪酸组分的影响。选取24只3月龄杜泊×小尾寒羊杂交公羔[(25±1)kg],随机分为4组,每组6只羊。各组分别饲喂含有0(对照)、10%、20%和30%沙棘果渣的试验饲粮。试验期50 d。结果表明:1)10%和20%水平组羔羊的宰前活重显著高于对照组和30%水平组(P0.05),10%水平组羔羊的平均日增重显著高于其他各组(P0.05),20%水平组羔羊的平均日采食量显著高于其他各组(P0.05),10%水平组羔羊的料重比显著低于其他各组(P0.05)。2)30%水平组羔羊的肝脏、脾脏指数显著高于其他各组(P0.05),网胃指数显著低于其他各组(P0.05)。10%、20%和30%水平组羔羊的大肠和小肠指数显著高于对照组(P0.05)。3)30%水平组羔羊的血清高密度脂蛋白(HDL)含量显著高于其他各组(P0.05),10%、20%和30%水平组羔羊的动脉粥样硬化指数(AI)显著低于对照组(P0.05),10%、20%和30%水平组羔羊的血清总抗氧化能力(T-AOC)、谷胱甘肽过氧化物酶(GSH-Px)和超氧化物歧化酶(SOD)活性显著高于对照组(P0.05),30%水平组羔羊的血清谷草转氨酶(AST)、谷丙转氨酶(ALT)、乳酸脱氢酶(LDH)活性及肌酐(CRE)和尿素氮(UN)含量显著高于其他各组(P0.05)。4)10%、20%和30%水平组羔羊的背最长肌中亚油酸、反油酸、花生四烯酸、总多不饱和脂肪酸(ΣMUFA)和总不饱和脂肪酸(ΣUFA)比例显著高于对照组(P0.05),油酸、总饱和脂肪酸(ΣSFA)和总单不饱和脂肪酸(ΣPUFA)比例显著低于对照组(P0.05)。由此可见,育肥羔羊饲粮中添加沙棘果渣有利于其生长发育和生长性能的提高,适宜添加水平为10%~20%。 相似文献
13.
试验对7月龄陶赛特×小尾寒羊F1代（简称陶×寒F1）公母羔羊肌肉化学成分进行了比较研究。试验选择了在集约化饲养方式下饲养的7月龄陶赛特×小尾寒羊F1代公羔、母羔各5只进行屠宰,分别取背最长肌后测定常规营养成分、氨基酸、长链脂肪酸、胆固醇、矿物元素等养分的含量。结果表明,陶×寒F1公羔、母羔之间在背最长肌中干物质、粗蛋白质、粗脂肪、粗灰分、钙、磷等含量上均无显著差异（P>0.05）。各种氨基酸含量、总必需氨基酸含量、总非必需氨基酸含量、总氨基酸含量差异均不显著（P<0.05）。公羔与母羔背最长肌中大部分脂肪酸的含量、总不饱和脂肪酸含量均无显著差异（P>0.05）,但公羔背最长肌中亚油酸的含量提高20.3%（P<0.05）,胆固醇含量降低约32%（P<0.05）。羔羊不同性别之间背最长肌中的镁、锌、铜、锰含量没有显著差异（P>0.05）,但母羔背最长肌中的铁含量比公羔的高约26%（P<0.05）。因此,7月龄陶×寒F1公羔、母羔肌肉的营养价值基本相同。 相似文献
14.
Talal Al Khewani Mohamed Momani Shaker Samer Al-Olofi 《Tropical animal health and production》2014,46(8):1363-1370
A fattening experiment was carried out to analyze and evaluate the effect of ram lamb genotype on the growth, feed conversion (FC), and carcass value of Dhamari ram lambs, F1 crossbreds of Dhamari?×?Tehami (F1 DhT), and Tehami ram lambs. Genotype of the ram lambs including the experiment (n?=?30) had high significant effect on total weight gain (TWG), average daily gain (ADG), and FC (P?P?P?P?P?P?P?1 DhT was better than Tehami ram lambs in ADG, TWG, and FC. Additionally, the results show that the feed conversion was in F1 DhT crossbreds ram lambs better than pure Dhamari and Tehami ram lambs, mainly in the carcass indicators. 相似文献
15.
Moghaddam Aliasghar Panah Mohammad Souri Manochehr 《Tropical animal health and production》2019,51(6):1539-1544
The effect of an ad libitum supplementary feeding on some reproductive characteristics of ram lambs were evaluated. Twelve Sanjabi rams were allocated to one of two groups: control (C) and treatment (T). The control group received hay and the treatment group received hay and concentrate with gross energy and crude protein concentration of 4.52 Mcal and 16% of dry matter, respectively. At the end of experiment, after taking blood samples for determination of testosterone concentration (TC), all lambs were castrated and the testicular weight (TWT), testicular volume (TV), testicular length (TL), and testicular width (TW) were measured. In addition, testes were subjected to histological analysis. Body weight (BW), TC, TWT, TL, and TV in the T group were higher (P?<?0.05) than the C group. However, TW was not affected by diet (P?>?0.05). Animals from the C group presented lower numbers (P?<?0.05) of Sertoli (SCN), germ (GCN), and Leydig cell numbers (LCN) compared to the T group. Also, seminiferous tubule diameter (STD) in the T group was significantly greater than (P?<?0.05) the C group. TWT had a significant association with TC (P?<?0.05), STD (P?<?0.01), SCN (P?<?0.01), GCN (P?<?0.05), and LCN (P?<?0.05). TC was correlated with STD (P?<?0.01), SCN (P?<?0.01), GCN (P?<?0.05), and LCN (P?<?0.05). STD showed close correlation with SCN (P?<?0.01), GCN (P?<?0.01), and LCN (P?<?0.05). Also, SCN had a positive association with GCN (P?<?0.01) and LCN (P?<?0.05). A positive correlation was found between GCN and LCN (P?<?0.01). In conclusion, the plane of nutrition of growing ram lambs enhances their growth and testicular development and probably will increases their postpubertal reproductive performance.
相似文献16.
A. Belanche J. Balcells G. De La Fuente D. R. Yañez‐Ruíz M. Fondevila L. Calleja 《Journal of animal physiology and animal nutrition》2010,94(5):648-658
This study examined the reticulo‐rumen characteristics of the microbial community and its fermentative characteristics in milk‐fed, at weaning and finished lambs in a conventional fattening system. Five lambs were assigned to each of three groups: milk‐fed lambs slaughtered at 30 days (T30), weaned lambs slaughtered at 45 days (T45) and ‘finished lambs’ slaughtered at 90 days (T90). At slaughter, rumen size, fermentation parameters (pH, volatile fatty acids and microbial enzyme activity) and protozoal counts were recorded. Quantitative PCR was used to quantify the genes encoding 16S and 18S ribosomal DNA of the rumen bacterial and protozoal populations, respectively, and the sequential colonization of the rumen by cellulolytic (Ruminococcus albus, Ruminococcus flavefaciens) and amylolytic (Prevotella ruminicola, Streptococcus bovis) bacteria, and protozoa (Entodinium sp.). Denaturing gradient gel electrophoresis was used to study the development of rumen microbiota biodiversity. Intake of solid food before weaning caused a significant increase in rumen weight (p < 0.0001) and bacterial DNA (p < 0.05) and volatile fatty acid analysis concentration (p < 0.01), whereas pH declined. In milk‐fed lambs, cellulolytic bacteria were evident after 30 days. Thereafter, in the 45‐day and 90‐day groups, the proportions of R. flavefaciens decreased and R. albus increased. Amylolytic bacteria were present in milk‐fed lambs; the proportion of P. ruminicola increased in fattening lambs and S. bovis was the least abundant species. Protozoal concentrations were irregular; milk‐fed lambs had a significant number of protozoa species from Entodinium and subfamily Isotrichiidae, but they disappeared at weaning. Lamb rumen were refaunated in some individuals at 90 days (Entodinium and subfamily Diplodiniinae spp.), although individual concentrations were variable. 相似文献
17.
本试验旨在研究相对饲养水平对阿勒泰羊生长性能、屠宰性能、器官发育及肉品质的影响。选取3.0~3.5月龄、体重[(19.16±0.54)kg]接近、臀型一致、健康状况良好的阿勒泰母羔羊30只,随机分为3组,每组10只羊。自由采食60 d后,参照NRC(2007)饲养标准中维持能量(Em)需要,通过控制试验羊采食量,3个组分别按1.5(0.75 MJ/kg W^0.75,1.5Em组)、1.0(0.50 MJ/kg W^0.75,1.0Em组)、0.5倍Em(0.25 MJ/kg W^0.75,0.5Em组)饲喂30 d。结果表明:1)随着相对饲养水平的降低,3组的末重、平均日增重极显著降低(P<0.01)。2)随着相对饲养水平的降低,3组的宰前活重、胴体重极显著降低(P<0.01)。1.5Em组的屠宰率、眼肌面积和GR值显著高于1.0Em组、0.5Em组(P<0.05)。3)1.5Em组的心脏、肝脏、脾脏和肾脏重量和指数显著或极显著高于1.0Em组、0.5Em组(P<0.05或P<0.01)。1.0Em组的心脏、肾脏重量及心脏、肝脏、肾脏指数显著或极显著高于0.5Em组(P<0.05或P<0.01)。1.5Em组的毛+皮和头+蹄重量和指数显著或极显著高于1.0Em组、0.5Em组(P<0.05或P<0.01)。4)1.5Em组的背最长肌亮度值显著低于1.0Em组、0.5Em组(P<0.05),1.0Em组的背最长肌失水率显著低于1.5Em组、0.5Em组(P<0.05)。5)1.5Em组的背最长肌水分含量显著低于1.0Em组、0.5Em组(P<0.05),1.5Em组的背最长肌粗脂肪含量显著高于1.0Em组、0.5Em组(P<0.05)。由此可见,相对饲养水平可显著影响阿勒泰羊的平均日增重、屠宰性能、器官发育和部分肉品质指标。 相似文献
18.
In this study, the effects of diet including different levels of olive cake were investigated on the fattening performance, blood parameters, certain slaughtering traits, and carcass quality of lambs. Thirty-six male lambs were used in the experiment. The lambs were randomly assigned to three groups with 12 lambs each. Groups included control, 12.5 and 25% olive cake (OC). The mixed feeds were offered ad libitum. All lambs were also allowed to consume alfalfa hay (83.8 g DM/animal/day). The experiment lasted for a period of 56 days. The effect of different levels of olive cake was not found different in fattening performance values of lambs in 0–56 days (P > 0.05). Carcass weight, pH, and yield were not different (P > 0.05). While the values of color parameters, cooking loss, tenderness, and ether extract level of longissimus dorsi muscle (MLD) was not found different (P > 0.05), it was determined that the levels of olive cake increased the water-holding capacity of meat (P < 0.05). Furthermore, although the levels of olive cake were shown to decrease total n-3 and total saturated fatty acids (Σ SFA), they also increased total n-6, n-6/n-3 ratio, total monounsaturated fatty acids (Σ MUFA), and total polyunsaturated fatty acids (Σ PUFA) were not different (P > 0.05). 相似文献
19.
本试验旨在研究饲粮中金针菇菌渣水平对山羊屠宰性能及肉品质的影响。试验选用28只体重为(23.35±2.45)kg的波杂羊(波尔山羊×徐淮山羊),随机分成4组(每组7只),分别饲喂含0(A组,作为对照组)、15%(B组)、25%(C组)、40%金针菇菌渣(D组)的试验饲粮。试验羊单独饲喂,在试验结束时(饲喂45 d后)进行屠宰,分别测定山羊的屠宰率、眼肌面积以及背最长肌的pH、色度、剪切力、蒸煮损失率和滴水损失率。结果表明:1)C组的屠宰率与B组差异不显著(P0.05),但显著高于A和D组(P0.05);C组的屠宰率分别比A、B和D组提高了2.46%、1.35%和8.32%。B和C组的眼肌面积与A组差异不显著(P0.05),但显著高于D组(P0.05)。2)C组山羊的背最长肌的滴水损失率与B和D组差异不显著(P0.05),但显著低于A组(P0.05);与A、B和D组相比,C组山羊的背最长肌的蒸煮损失率显著降低(P0.05);B、C和D组的剪切力差异不显著(P0.05),但均显著低于A组(P0.05)。饲粮中添加不同水平的金针菇菌渣对山羊背最长肌宰后45 min pH(pH_(45 min))、宰后24 h pH(pH_(24 h))、红度(a~*)值和黄度(b~*)值无显著影响(P0.05),但能显著降低背最长肌亮度(L~*)值。由此可见,饲粮中添加不同水平的金针菇菌渣对山羊的屠宰性能以及肉品质产生不同程度的影响,饲粮中金针菇菌渣水平为25%时对提高山羊的屠宰性能以及改善肉品质方面具有较好的效果。 相似文献
20.
Yuxin YANG Jia GUO JinSoo KIM MyeongHyeon WANG ByungJo CHAE 《Animal Science Journal》2012,83(2):169-177
The objective of this study was to evaluate the effect of different growth rates on carcass characteristics and meat quality and their relationship with myogenesis and lipogenesis in finishing pigs. Pigs were slaughtered at the same age and were assigned to high (HGR) or low (LGR) growth rates with 120 kg or 110 kg final body weights at slaughter. The results indicated that pigs with HGR had heavier (P < 0.05) final body weight, carcass weight, dressing percentage, backfat thickness, higher (P < 0.05) concentrations of fat in the muscle and higher (P < 0.05) total RNA concentration in muscle than pigs with LGR. The messenger RNA (mRNA) expression of lipoprotein lipase, fatty acid synthase, malic enzyme, peroxisome proliferator-activated receptor γ, and sterol regulatory element binding protein-1 in fat were higher (P < 0.05) in pigs with HGR. Additionally, the mRNA expression of glycogen synthase in muscle was lower (P < 0.05) in pigs with HGR. These results indicate differences in postmortem myogenesis and lipogenesis traits of pigs with different growth rates; these differences in turn might have affected carcass characteristics and meat quality. 相似文献