在荷兰,近年来,禽肉生产一直在向生长缓慢的肉鸡的肉鸡生产系统发展。在这项研究中,季节的影响,捕捉方法,并评估了荷兰四个不同肉鸡生产系统中car体质量和生产参数的减薄。这项研究的数据是从2018年,2019年和2020年的屠宰场数据中收集的,其中包含有关四种不同肉鸡生产系统的信息:常规(快速生长)肉鸡(CONV),2种不同的室内生长缓慢的肉鸡(SGB1和SGB2),和更好的生活1星(BLS)的概念与缓慢增长的肉鸡。数据集包括CONV的14,976、1,730、3,713和1,121条记录(群),SGB1、SGB2和BLS,分别。所有三个生长缓慢的肉鸡生产系统的屠宰重量都较低,平均日增益(ADG),第一周死亡率,和总死亡率比CONV(不稀释)。SGB2和BLS的ADG低于SGB1。3月/4月放置日龄雏鸡时,屠宰重量和ADG最低,9月/10月放置时最高。所有生长缓慢的肉鸡生产系统都有较低的足垫损伤评分和较低的飞鸡烧伤发生率,腿部血肿,乳房血肿,死鸡(DOA),和总拒绝比CONV。秋天的羊群有更多的伤痕,较高的脚垫损伤评分,和更多的翅膀血肿比弹簧群。与冬季相比,夏季发现的臀部结痂更多,总排泄物更少。瘦小的羊群有更多的臀部结痂,氨烧伤,和DOA和更少的hock烧伤,脚垫损伤,翼血肿,腿部血肿,乳房血肿,和完全拒绝比不稀疏的羊群。机械捕获的羊群有更多的氨烧伤,DOAs,和总拒绝比手动捕获的羊群。总之,这项研究表明,与CONV相比,所有三个生长缓慢的肉鸡生产系统的第一周死亡率和总死亡率均较低,大多数car体质量参数和福利指标的评分均较高.
In the Netherlands, poultry meat production has been evolving in recent years toward broiler production systems with slow-growing broilers. In this study the effects of season, catching method, and thinning on carcass quality and production parameters in four different broiler production systems in the Netherlands was evaluated. The data for this study were collected from slaughterhouse data in 2018, 2019, and 2020 and contained information about four different broiler production systems: conventional (fast growing) broilers (CONV), 2 different indoor slow-growing broilers (SGB1 and SGB2), and Better Life 1 Star (BLS) concept with slow-growing broilers. The data set consisted of 14,976, 1,730, 3,713, and 1,121 records (flocks) for CONV, SGB1, SGB2, and BLS, respectively. All three production systems with slow-growing broilers had a lower slaughter weight, average daily gain (ADG), first-week mortality, and total mortality than CONV (no-thinning). ADG of SGB2 and BLS was lower than that of SGB1. Slaughter weight and ADG were the lowest when day-old chicks were placed in March/April and the highest when they were placed in September/October. All slow-growing broiler production systems had a lower footpad lesion score and a lower incidence of hock burns, leg hematomas, breast hematomas, dead-on-arrival chickens (DOA), and total rejects than CONV. Autumn flocks had more hock burns, a higher footpad lesion score, and more wing hematomas than spring flocks. More scabby hips and fewer total rejects were found during the summer months than during the winter months. Thinning flocks had more scabby hips, ammonia burns, and DOAs and fewer hock burns, footpad lesions, wing hematomas, leg hematomas, breast hematomas, and total rejects than no-thinning flocks. Mechanically caught flocks had more ammonia burns, DOAs, and total rejects than manually caught flocks. In conclusion, this study showed that all three production systems with slow-growing broilers had a lower first-week mortality and total mortality and better scores on most carcass quality parameters and welfare indicators than CONV.