Liu N, Ding K, Wang J, Deng Q, Gu K, Wang J
Department of Animal Production, Henan University of Science and Technology, Luoyang, China.
Hongxiang Biological Feed Laboratory, Henan University of Science and Technology, Luoyang, China.
J Anim Physiol Anim Nutr (Berl). 2018 Aug;102(4):953-961. doi: 10.1111/jpn.12901. Epub 2018 Apr 11.
This study aimed to investigate the effect of lactic acid bacteria (LAB) and smectite on the growth performance, nutrient digestibility and blood parameters of broilers that were fed diets contaminated with aflatoxin B (AFB ). A total of 480 newly hatched male Arbor Acres broilers were randomly allocated into four groups with six replicates of 20 chicks each. The broilers were fed diets with the AFB (40 μg/kg) challenge or without (control) it and supplemented with smectite (3.0 g/kg) or LAB (4.0 × 10 CFU/kg) based on the AFB diet. The trial lasted for 42 days. The results showed that during days 1-42 of AFB challenge, the feed intake (FI) and body weight gain (BWG) were depressed (p < .05). The inclusion of LAB and smectite increased (p < .05) the BWG by 71.58 and 41.89 g/bird, respectively, which reached the level of the control diet (p ≥ .05), but there were no differences (p ≥ .05) in performance between LAB and smectite. LAB and smectite also increased (p < .05) the apparent total tract digestibility of the crude protein. Regarding the blood parameters, AFB decreased (p < .05) the levels of red blood cell count, haematocrit, mean corpuscular volume, haemoglobin, albumin and total protein. In the meantime, the AFB increased (p < .05) leucocyte counts, urea nitrogen, cholesterol, total bilirubin, creatinine, glutamic-pyruvic transaminase, glutamic oxaloacetic transaminase and alkaline phosphatase. By contrast, LAB and smectite affected (p < .05) these parameters in the opposite direction. It can be concluded that after the AFB challenge, LAB and smectite have similar effects on the growth and health of the broilers, suggesting that LAB could be an alternative against AFB in commercial animal feeds.
本研究旨在调查乳酸菌（LAB）和蒙脱石对饲喂受黄曲霉毒素B（AFB）污染日粮的肉鸡生长性能、养分消化率和血液参数的影响。总共480只新孵化的雄性艾维茵肉鸡被随机分为四组，每组六个重复，每个重复20只雏鸡。肉鸡分别饲喂有AFB（40μg/kg）挑战或无AFB（对照）的日粮，并根据AFB日粮补充蒙脱石（3.0g/kg）或LAB（4.0×10⁸CFU/kg）。试验持续42天。结果表明，在AFB挑战的第1至42天，采食量（FI）和体重增加（BWG）降低（p＜0.05）。添加LAB和蒙脱石分别使每只鸡的BWG增加了71.58和41.89g（p＜0.05），达到了对照日粮的水平（p≥0.05），但LAB和蒙脱石之间的性能没有差异（p≥0.05）。LAB和蒙脱石还提高了（p＜0.05）粗蛋白的表观总肠道消化率。关于血液参数，AFB降低了（p＜0.05）红细胞计数、血细胞比容、平均红细胞体积、血红蛋白、白蛋白和总蛋白水平。同时，AFB增加了（p＜0.05）白细胞计数、尿素氮、胆固醇、总胆红素、肌酐、谷丙转氨酶、谷草转氨酶和碱性磷酸酶。相比之下，LAB和蒙脱石对这些参数的影响方向相反（p＜0.05）。可以得出结论，在AFB挑战后，LAB和蒙脱石对肉鸡的生长和健康有相似的影响，这表明LAB可以作为商业动物饲料中对抗AFB的替代品。
