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Effect of some natural feed additives on performance, some physiological parameters and immune response of young chickens fed aflatoxic diets
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Abstract: The current study was carried out at the Poultry Research Station and the Laboratories belonging to the Animal and Poultry Research Institute, Agricultural Research Center, Ministry of Agriculture during the period from the 1stJune to the last of November 2005.
The main objectives of this work were to investigate; 1- the response of a local Egyptian chicken strain (Inshas) to aflatoxicosis, 2- the effectiveness of using three anti-aflatoxic agents with different mode of actions. The three agents investigated included; a) Hydrated sodium calcium aluminosilicate (HSCAS)as an adsorbent which demonstrated a high affinity for aflatoxins, b) Mannanoligosaccharide (Bio- Mos@) as a biological derivative, c) Radish extract (RE) as an antioxidant agent rich in peroxidase enzyme.
To achieve these goals a total number of (810) one-day- old chicks were used .The chicks were weighed, wingbanded and randomly divided into nine experimental groups of 90 unsexed vaccinated chicks (three replicates each group) .The chicks were housed in floor pens with an evenly decreasing day length from 24 hours in the first week to 11 hours during growing period (12-20) wk and then 17 hours throughtout laying period (20-28) wk. The birds were placed in a room maintained at a constant temperature of (26±3)ºC and a relative humidity of (70±3)% .Food and water were always available ad libtum . The chickens were vaccinated as young layer chicks with live attenuated vaccines for newcastle disease, infectious bronchitis, infectious bursal disease and a polyvalent bacterin for fowl cholera at different ages from 4 to 95 days.
The experimental design consisted of nine experimental groups:
control and 8 dietary treatments as follows; (Tl) Basal diet + AF(1.0mg total AF/kg diet), (T2) Basal diet + AF+ Bio-mos (1.0g/kg diet), (T3) Basal diet +AF+ RE(l0g/kg diet), (T4) Basal diet +AF+ HSCAS(0.5%), (T5) Basal diet + AF+ Bio-mos + RE , (T6) Basal diet +AF+Bio-mos +HSCAS, (T7) Basal diet +AF+RE + HSCAS , (T8) Basal diet +AF+Bio-mos +RE + HSCAS , and (T9) Basal diet (control).
Experimental dietary treatment started at the age of 4 weeks and ca lasted for 24 wk till the age of 28 wk
Three basal diets were offered to birds. A starter diet during the extr period (4-12) wk containing 19.66% CP, 2806.56 kcal ME; a grower diet during the period (12-20) wk containing 15.76 % CP , 2725.30 kcal ME ;and a laying diet during the period (20-28) wk containing 17.52 % CP , 2718.51 kcal ME.
Characteristics investigated included :Live body weight; feed consumption and efficiency of feed utilization; relative weight of internal organs (bursa of Fabricius, the thymus glands, spleen, liver, the gall bladder, kidneys, ovary and testes ); serum biochemical estimates (serum AST and AL T activities , total lipids, total protein, albumin, globulin, A / G ratio, creatinine, urea and calcium); hematological traits (Total RBC's and WBC's counts, differential leukocytic count, hematocrite %, H / L ratio); age at sexual maturity; egg production traits (egg number / hen / first 4 wk of laying, average egg weight, egg mass / hen / first 4 wk of laying); immune response against NBVD; residual AF in the liver, muscles and eggs; histapothological investigation of the liver, bursa of Fabricius, spleen, thymus glands, caecal tonsils, testes and ovary.
Results obtained could be summarized as follows;
1 - All traits studied were adversely affect by AF treatment.
2- The three anti - AF agents studied showed significant beneficial effects in ameliorating the adverse effects resulting from AF administration.
3- In most cases the best protective effects were obtained with MOS and its combinations followed by HSCAS.
4- Radish extract (RE) seemed to be less effective than the other two agents.
5-In many cases RE antagonized the action of MOS or HSCAS.
Thus, on the basis of the achieved results in the present study MOS, if available, could be recommended as an efficient protective substance in cases of aflatoxicosis followed by HSCAS or their combination. In locations where radish is available in sufficient amounts, it could be chopped off and introduced fresh to birds as a protective feed additive.
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| Publication year |
2006
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| Pages |
PP. 202
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| Availability location |
مكتبة معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى- الجيزة
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| Availability number |
985
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| Organization Name |
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| Country |
Egypt
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Aflatoxins.
Chickens.
Feed additives.
Immune response.
Performance testing.
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| Proposed Agrovoc |
Mannanoligosaccharide;
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| Publication Type |
Master Thesis
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