PDF(Pubmed)
Abstract：
The aims of this study were (i) to evaluate the effect of density, lineage, age, and time of day on dorsal surface temperature and (ii) to evaluate the effect of density and lineage on performance and carcass condemnations in broiler grillers. The evaluations were carried out in barns with the Dark House system, with two densities, 17 and 19 chickens/m2 and two lineages, Cobb and Ross. The dorsal surface temperature of the chickens was measured by infrared thermography at 7, 14, 21, 23, 25 and 27 days of age, four times a day. The average daily weight gain, feed conversion, mortality, partial carcass condemnations, as well as those due to arthritis and dermatosis were also evaluated. The highest dorsal surface temperatures were observed in Cobbs housed at a density of 17 chickens/m2, and in Ross housed at a density of 19 chickens/m2. Cobbs housed at a 17 chickens/m2 density showed the lowest feed conversion compared to Ross at the same density. Ross showed higher dorsal surface temperatures when compared to Cobbs at 14, 21, and 27 days. Cobbs showed higher percentages of partial carcass condemnation and arthritis compared to Ross. The higher density of broiler grillers in the Dark House system does not influence the dorsal surface temperature, performance, dermatosis, arthritis, and partial carcass condemnations.
摘要：
这项研究的目的是(I)评估密度的影响，血统,年龄,和背部表面温度的一天中的时间，以及（ii）评估密度和谱系对肉鸡烤架性能和car体谴责的影响。评估是在谷仓里用黑屋系统进行的，有两种密度，17和19鸡/m2和两个谱系，科布和罗斯.在7,14,21,23,25和27日龄时,用红外热成像法测定鸡的背部温度,一天四次.平均每日体重增加，饲料转换，死亡率,部分car体谴责，以及那些由于关节炎和皮肤病也进行了评估。在以17只鸡/m2的密度饲养的Cobbs和以19只鸡/m2的密度饲养的Ross中观察到最高的背表面温度。与相同密度的Ross相比,以17只鸡/m2的密度饲养的Cobbs显示出最低的饲料转化率。在14、21和27天，与Cobbs相比，Ross的背侧表面温度更高。与罗斯相比，科布斯显示出更高的部分car体谴责和关节炎百分比。黑屋系统中密度较高的肉鸡烤架不会影响背部表面温度，性能，皮肤病,关节炎,和部分尸体谴责。
