Department of Animal Science and Technology, Chung-Ang University, Anseong-si, Gyeonggi-do, 17546, Republic of Korea.
Animal Nutrition and Physiology Team, National Institute of Animal Science, Rural Development Administration, Wanju, 54875, Republic of Korea.
Biol Trace Elem Res. 2020 Feb;193(2):517-523. doi: 10.1007/s12011-019-01726-2. Epub 2019 Apr 22.
The present experiment was conducted to derive equations for predicting daily lead (Pb) intake and tissue Pb concentrations in broiler chickens using feather Pb concentrations. A total of 800 3-day-old broiler chickens were allotted to one of five dietary treatments with 16 replicates, each replicate consisting of 10 birds, in a completely randomized design. Dietary Pb concentrations were set to 0, 50, 100, 200, or 400 mg/kg by adding a lead acetate. The experimental diets were provided ad libitum for 32 days. Results indicated that growth performance and serum measurements were not affected by increasing concentrations of Pb in diets, which represented that the toxic level of dietary Pb may exceed over 400 mg/kg in broiler diets. Increasing concentrations of Pb in diets increased Pb concentrations in the liver (linear and quadratic, P < 0.05), breast (linear, P < 0.01), and feather (linear, P < 0.01). Feather Pb concentrations were greater than Pb concentrations in the liver and breast, indicating that the feather is highly responsive tissue of broiler chickens to various dietary Pb concentrations. Consequently, the equations for predicting daily Pb intake and Pb concentrations in the liver and breast were derived from Pb concentrations in the feather. Resulting equations indicated that feather Pb concentrations in broiler chickens can be used to predict both daily Pb intake and Pb concentrations in the liver and breast.
本实验旨在通过羽毛铅浓度来推导预测肉鸡每日铅（Pb）摄入量和组织 Pb 浓度的方程。将 800 只 3 日龄肉鸡随机分为 5 个日粮处理组，每组 16 个重复，每个重复 10 只鸡，采用完全随机设计。通过添加醋酸铅将日粮中的 Pb 浓度设置为 0、50、100、200 或 400mg/kg。实验日粮自由采食 32 天。结果表明，生长性能和血清指标不受日粮中 Pb 浓度增加的影响，这表明肉鸡日粮中 Pb 的毒性水平可能超过 400mg/kg。日粮中 Pb 浓度的增加会导致肝脏（线性和二次，P<0.05）、胸部（线性，P<0.01）和羽毛（线性，P<0.01）中 Pb 浓度增加。羽毛中的 Pb 浓度大于肝脏和胸部中的 Pb 浓度，表明羽毛是肉鸡对各种日粮 Pb 浓度高度敏感的组织。因此，从羽毛中的 Pb 浓度推导了预测肉鸡每日 Pb 摄入量和肝脏、胸部 Pb 浓度的方程。结果表明，肉鸡羽毛中的 Pb 浓度可用于预测每日 Pb 摄入量和肝脏、胸部的 Pb 浓度。
