Department of Animal Breeding, Faculty of Animal Breeding and Biology, UTP - University of Science and Technology in Bydgoszcz, 85-084 Bydgoszcz, Poland.
Department of Animal Breeding, Faculty of Animal Breeding and Biology, UTP - University of Science and Technology in Bydgoszcz, 85-084 Bydgoszcz, Poland.
Poult Sci. 2020 Dec;99(12):7169-7177. doi: 10.1016/j.psj.2020.08.073. Epub 2020 Sep 14.
The aim of the study was to compare production results and quality of meat, as well as histological features of the jejunum in broiler chickens administered feed with 1% addition of zeolite or halloysite, with the addition of aluminosilicates to litter (4.50 kg/m) throughout the rearing. In the experiment, 300 male broilers were used for 6 wk. They were divided into 3 groups, each of 10 repetitions (10 birds each). Group 1 was a control, halloysite was added to feed and litter in group 2, while zeolite was applied instead of halloysite in group 3. After rearing, 10 selected birds from each group were slaughtered. Selected production properties and degree of footpad dermatitis were examined, and histomorphometric examination of the jejunum was performed. The lowest yield and the highest proportion of neck with skin in the carcass were demonstrated in group 2 (P < 0.05). The lowest percentage of skin with subcutaneous fat was found in group 3 (P < 0.05). A decrease in lightness (L∗) and yellowness (b∗) was demonstrated in group 2, while redness (a∗) was the lowest in group 3 (P < 0.05). Group 2 was characterized by the lowest water-holding capacity in breast muscles, and in group 3, in leg muscles (P < 0.05). In group 3, the highest fat content and the lowest water content in the breast muscles (P < 0.05) were found. The leg muscles in groups 2 and 3 were characterized by the highest a∗, and in group 2, by b∗. The control group had the lowest protein and the highest fat content in leg muscles. In the intestine from group 2, a higher height (P < 0.05) and surface area (P < 0.01) of intestinal villi were found, in comparison to group 3. The width of intestinal villi was higher in groups 2 and 1 than in group 3 (P < 0.05), similarly the depth of intestinal crypts. The addition of zeolite could be proposed because of the obtained production results, while the halloysite had a positive effect on the histomorphometric features of the jejunum.
本研究旨在比较在整个饲养过程中向饲料中添加 1%沸石或埃洛石以及向垫料中添加铝硅酸盐对肉鸡生产性能和肉品质以及空肠组织学特征的影响。实验中使用了 300 只雄性肉鸡，饲养 6 周。它们被分为 3 组，每组 10 个重复（每个重复 10 只）。第 1 组为对照组，第 2 组向饲料和垫料中添加埃洛石，第 3 组则用沸石代替埃洛石。饲养结束后，从每组中选择 10 只鸡进行屠宰。检查了各项生产性能和脚垫皮炎的严重程度，并对空肠进行了组织形态学检查。第 2 组的产肉率最低，胴体颈部带皮比例最高（P<0.05）。第 3 组的皮中含皮下脂肪比例最低（P<0.05）。第 2 组的亮度（L∗）和黄度（b∗）值最低，而第 3 组的红色度（a∗）最低（P<0.05）。第 2 组胸肌的持水能力最低，第 3 组腿肌的持水能力最低（P<0.05）。第 3 组胸肌的脂肪含量最高，水分含量最低（P<0.05）。第 2 组和第 3 组的腿肌的 a∗值最高，第 2 组的 b∗值最高。对照组腿肌的蛋白质含量最低，脂肪含量最高。第 2 组空肠的肠绒毛高度（P<0.05）和表面积（P<0.01）高于第 3 组。第 2 组和第 1 组的肠绒毛宽度高于第 3 组（P<0.05），肠隐窝的深度也高于第 3 组（P<0.05）。由于获得了较好的生产性能，可考虑添加沸石，而埃洛石对空肠的组织形态学特征有积极影响。
