Alzawqari Mohammed H, Shukry Atta Mustafa, Metwally Abdallah, Selim Shaimaa, Wadaan Mohammad A M, Kim In Ho, Cho Sungbo, Eltahan Hossam M, Alagawany Mahmoud, Alhotan Rashed A, Al Sulaiman Ali R, Hussein Elsayed Osman, Saleh Ahmed A
Department of Poultry Production, Faculty of Agriculture, Kafrelsheikh University, Kafr El-Sheikh 333516, Egypt.
Department of Animal Production, Faculty of Agriculture and Food Sciences, Ibb University, Ibb 70270, Yemen.
Arch Anim Breed. 2023 Dec 21;66(4):451-460. doi: 10.5194/aab-66-451-2023. eCollection 2023.
This study aimed to show the effect of bile acid (BA) and xylanase (Xyl) supplementation on the growth, fat digestibility, serum lipid metabolites, and ileal digesta viscosity of broilers. A total of 720 1 d old male broilers were allocated to one of nine treatments with four replicates in each under a factorial design arrangement of three levels of BA (0 %, 0.25 %, and 0.50 %) and three levels of Xyl (0 %, 0.05 %, and 0.10 %) supplementation. The duration of the experiment was 35 d (7-42 d). Growth performance, blood lipids, fat digestibility, and ileal digesta viscosity were determined. The experimental treatments did not affect feed intake (FI) and weight gain (WG). Supplementation of BA or Xyl did not significantly ameliorate the feed conversion rate (FCR) (). The addition of BA linearly increased fat digestibility. At 7-21 d of age, the addition of BA or Xyl had a significant () increase in serum cholesterol (Chol) but no significant difference for other serum lipid parameters in broiler chickens fed with Xyl in the starter and grower periods. However, the supplementation of 0.5 % BA at 7-21 d of age significantly increased the Chol and low-density-lipoprotein (LDL) levels. The results of this trial revealed that the supplementation of xylanases had a great effect on the degradation of arabinoxylan from wheat, which led to a relatively greater reduction in ileal digesta viscosity; it was also found that supplementation of BA significantly increased the concentration of serum lipid metabolites, whereas BA and Xyl supplementation linearly increased the fat digestibility of the birds fed wheat and tallow diets.
本研究旨在探讨添加胆汁酸（BA）和木聚糖酶（Xyl）对肉鸡生长性能、脂肪消化率、血清脂质代谢产物及回肠食糜黏度的影响。720只1日龄雄性肉鸡按析因设计分为9个处理组，每组4个重复，分别添加3个水平的BA（0%、0.25%和0.50%）和3个水平的Xyl（0%、0.05%和0.10%）。试验期为35天（7 - 42日龄）。测定生长性能、血脂、脂肪消化率和回肠食糜黏度。试验处理对采食量（FI）和体重增加（WG）无影响。添加BA或Xyl对饲料转化率（FCR）无显著改善作用（）。添加BA可使脂肪消化率呈线性增加。在7 - 21日龄时，添加BA或Xyl使饲喂Xyl的肉鸡血清胆固醇（Chol）显著升高（），但对其他血清脂质参数无显著差异。然而，在7 - 21日龄添加0.5% BA显著提高了Chol和低密度脂蛋白（LDL）水平。本试验结果表明，添加木聚糖酶对小麦阿拉伯木聚糖的降解有很大作用，导致回肠食糜黏度相对降低；还发现添加BA显著提高了血清脂质代谢产物浓度，而添加BA和Xyl可使饲喂小麦和牛油日粮的肉鸡脂肪消化率呈线性增加。
