Efficacy of clay minerals for controlling aflatoxin B1 toxicity in commercial broilers

IF 0.7 4区 农林科学 Q3 AGRICULTURE, MULTIDISCIPLINARY
Saba Akbar
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引用次数: 0

Abstract

Aflatoxin occurrence in poultry feed causes aflatoxicosis in birds and poses health hazards to the consumers. Aflatoxin B1 (AfB1) is the most predominant and toxic metabolite that is controlled through addition of argillaceous clays as non-nutritive additives. Non-smectitic indigenous clay reserves need testing as AfB1 adsorbent. With detailed mineral and adsorption characteristics, three indigenous non-smectitic clays: (i) palygorskite, (ii) palygorskite-smectite mix, and (iii) interstratified smectite with hydroxy interlayered smectite were tested against 250 µg kg-1 AfB1 contamination in a poultry feeding trial with three replications at 1% and 2% (w/w) with positive and negative controls. A total of 330 Ross-308 male broiler chicks, initially reared on clean feed under controlled conditions of light and humidity, were distributed into eleven treatment combinations in a completely randomized design with 30 birds in each treatment on an equal weight basis with three replications at day 14 and fed on experimental feeds for three weeks. Three birds from each pen were randomly slaughtered at day 35 and for each replicated treatment, body weight gain, feed intake, and internal organs weight and morphology were recorded. AfB1 contamination reduced weight gain (p 0.0001), feed conversion ratio (p 0.0001) and feed intake (p 0.0001) while clays addition in the toxin feed effectively controlled AfB1 toxicity as suggested by improved body weight, weight gain rate and feed consumption compared to the toxin fed birds. The liver morphology was comparatively better in palygorskite-smectite mix treatment when applied at 1% and the darkish colour was also improved with addition of the clay in the toxin feed. AfB1 feeding caused a 75% reduction in weight gain compared to the clean feed. Palygorskite and palygorskite-smectite mix clays were better than interstratified clay in increasing weight gain and caused a 60% and 65% increase over toxin feed treatment when applied at 1% and 2%, respectively. In conclusion, the indigenous clay sources overall and palygorskite-smectite mix in particular has the potential for use as a mycotoxin binder for controlling AfB1 incidence in poultry
粘土矿物对商品肉鸡黄曲霉毒素B1毒性的控制效果
家禽饲料中黄曲霉毒素的存在会引起鸟类的黄曲霉毒素中毒,并对消费者的健康造成危害。黄曲霉毒素B1(AfB1)是通过添加泥质粘土作为非营养添加剂来控制的最主要和毒性的代谢产物。非蒙脱石原生粘土储量需要作为AfB1吸附剂进行测试。具有详细的矿物和吸附特性的三种原生非蒙脱石粘土:(i)坡缕石,(ii)坡缕石-蒙脱石混合物,和(iii)具有羟基层间蒙脱石的层间蒙脱石,在家禽饲养试验中对250µg kg-1 AfB1污染进行了测试,在1%和2%(w/w)的条件下进行了三次重复,阳性和阴性对照。共有330只Ross-308公肉鸡,最初在控制光照和湿度的条件下用清洁饲料饲养,以完全随机设计的方式分为11个处理组合,每个处理中有30只鸡,在第14天进行三次重复,并用实验饲料喂养三周。在第35天,从每个围栏随机屠宰三只鸟,并记录每次重复处理的体重增加、采食量、内脏重量和形态。与毒素喂养的鸟类相比,AfB1污染降低了体重增加(p 0.0001)、饲料转化率(p 0.0000)和饲料摄入量(p 0.000 1),而在毒素饲料中添加粘土有效地控制了AfB1的毒性,这表明体重增加率和饲料消耗量有所提高。在凹凸棒石-蒙脱石混合处理中,当施用1%时,肝脏形态相对较好,并且在毒素饲料中添加粘土也改善了深色。与清洁饲料相比,AfB1饲料使体重增加减少了75%。坡缕石和坡缕石-蒙脱石混合粘土在增加增重方面优于层间粘土,当施用1%和2%时,分别比毒素饲料处理增加60%和65%。总之,本地粘土来源,特别是坡缕石-蒙脱石混合物,有潜力用作霉菌毒素粘合剂,控制家禽中AfB1的发病率
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来源期刊
Pakistan Journal of Agricultural Sciences
Pakistan Journal of Agricultural Sciences AGRICULTURE, MULTIDISCIPLINARY-
CiteScore
1.80
自引率
25.00%
发文量
18
审稿时长
6-12 weeks
期刊介绍: Pakistan Journal of Agricultural Sciences is published in English four times a year. The journal publishes original articles on all aspects of agriculture and allied fields.
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