Department of Animal Production and Technologies, Faculty of Agricultural Sciences and Technologies, Niğde Ömer Halisdemir University, 51240, Niğde, Turkey.
Department of Food Engineering, Faculty of Engineering and Architecture, Nevsehir Hacı Bektaş Veli University, 50300, Nevşehir, Turkey.
Trop Anim Health Prod. 2023 Apr 18;55(3):162. doi: 10.1007/s11250-023-03581-9.
This study examined the effect of Medicago sativa (A), Trifolium repens (WC), Lolium perenne (PR), and their mixture (Mix) on growth performance, carcass characteristics, internal organ weights, and meat quality of slower-growing broiler chickens in a free-range production system. The animal materials comprised of mixed-sex Hubbard ISA Red JA, which were reared in the deep litter system for the first 3 weeks, and thereafter, the pop hole in each of the indoor pens was opened to allow birds access to the range containing one of the above pasture treatments. The range availability was ensured from 08:30 a.m. to 4:30 p.m. The results indicated no significant difference in broiler live body weight, feed conversion ratio, and livability between 28 and 77 days among the pasture treatments (P > 0.05). No significant variations were observed in the carcass and internal organ weights among pasture types (P > 0.05). Additionally, while the dry matter content (P < 0.01), TBA value (P < 0.05), and fatty acid profiles differed (P < 0.01), the protein, ash, water holding capacity, and oxidation stability of broiler breast meat did not differ among pasture groups (P > 0.05). Moreover, while the values of breast meat lightness (L*) and brightness (b*) differed (P < 0.05), redness and pH did not differ between the sexes (P > 0.05). Furthermore, sex significantly affected ash, protein content (P < 0.05), and TBA value (P < 0.01) of breast meat but did not affect dry matter, water holding capacity, and peroxide value of breast meat. Also, there was a significant difference in the weight of the neck, breast, thigh, live weight, hot carcass yield, heart, liver, abdominal fat, and digestive system between sexes (P < 0.05). However, breast meat fat content and fatty acid profiles were not influenced by the sex of the broilers (P > 0.05). It was concluded that access to the studied pasture species has no effect on the growth performance traits but results in notable variations in the fatty acid profiles in broiler breast meat.
本研究旨在探讨紫花苜蓿（A）、白三叶草（WC）、黑麦草（PR）及其混合物（Mix）对自由放养生产系统中生长性能、胴体特征、内脏器官重量和鸡肉品质的影响。动物材料由混合性别 Hubbard ISA Red JA 组成，前 3 周在深垫料系统中饲养，此后，每个室内围栏的活动口打开，允许鸟类进入含有上述牧场处理之一的围场。从上午 8:30 到下午 4:30 确保围场可用。结果表明，在 28 至 77 日龄期间，牧场处理对肉鸡活体体重、饲料转化率和成活率没有显著影响（P＞0.05）。不同牧场类型之间的胴体和内脏器官重量没有显著差异（P＞0.05）。此外，尽管干物质含量（P＜0.01）、TBA 值（P＜0.05）和脂肪酸谱不同（P＜0.01），但不同牧场组的肉鸡胸肉的蛋白质、灰分、水分保持能力和氧化稳定性没有差异（P＞0.05）。此外，尽管胸肉的亮度（L*）和亮度（b*）值不同（P＜0.05），但性别之间的红色和 pH 值没有差异（P＞0.05）。此外，性别显著影响胸肉的灰分、蛋白质含量（P＜0.05）和 TBA 值（P＜0.01），但不影响胸肉的干物质、水分保持能力和过氧化物值。此外，雌雄之间的颈部、胸部、大腿、活体体重、热胴体产率、心脏、肝脏、腹部脂肪和消化系统重量存在显著差异（P＜0.05）。然而，胸肉脂肪含量和脂肪酸谱不受肉鸡性别的影响（P＞0.05）。研究表明，获得研究的牧场物种对生长性能特征没有影响，但会导致肉鸡胸肉的脂肪酸谱发生显著变化。
