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Improving productive and physiological parameters of broiler using some light regimes and feed additives
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Abstract: A total number of 360 one-day-old unsexed broiler chicks (Arbor Acres) were used in a 42-day experiment to investigate the effect of lighting regimes and BioTonic level in diet on chick performance. Chicks were randomly divided into equal 12 groups according to three lighting regimes: (L 1) continuous (23L: 1 D), (L 2) constant (15L :9D) and (L3) intermittent(8L:4D:8L:4D). Each light program was divided into four groups according to level of Bio- Tonic in diet as follow, (B 1) 0.0, (B2) 0.5, (B3) 1.0 and (B 4) 1.5 kg/ton diet. Chicks exposed to intermittent lighting had significantly higher (P<0.05 or P<0.01 ) live body weight at 7 weeks of age and body gain during 4-7 and 1-7 weeks periods than that exposed to continuous or constant lighting program. Chicks fed on B4 had significantly (P<0.01) higher body weight at 7 wks than that fed on other diets at all ages studied. The differences among Bio-Tonic levels in body weight at 7 weeks and body gain during 1-7 weeks period were highly significant (P<0.01). Feed consumption and feed conversion ratio of continuous lighting were significantly (P<0.05 or P<0.01) greater than that of either constant or intermittent lighting treatments at all ages studied. The birds fed on B 1 had significantly higher (P<0.05) feed consumption and feed conversion ratio than that fed on other Bio-Tonic levels in diet during all periods studied. Chicks fed on B 4 gave non significantly greater percentages of dressing, liver, heart, gizzard and giblets than that fed on the other Bio-Tonic treatments. An opposite trend was true for abdominal fat % with B 1 treatment. Birds exposed to constant had ether extract % significantly (P<0.05) greater than those exposed to continuous and intermittent lighting programs. Chicks reared under intermittent gave significantly greater (P<0.05 or P<0.01) liver protein % and glycogen (mg/g) than that reared under both continuous and constant lighting programs. Chicks fed on B 4 level had non significantly lower liver lipids % than other levels, and had greater liver protein% and liver glycogen (mg/g) than the other Bio-Tonic levels. Plasma total lipids were non significantly higher of constant than those continuous or intermittent lighting programs. The chicks fed on B 4 level had plasma total lipids and cholesterol lower, and plasma total protein, albumin, alkaline phosphatase activity, GOT, T3, T4 and GH higher than that fed on the other levels of Bio- Tonic. There were significant differences (P<0.05 or P<0.01) due to interaction effect between light regimes and Bio-Tonic level in the diet on body weight at 4 and 7 wk; body gain during 4-7 and 1-7 wk periods; feed consumption during all periods studied; feed conversion ratio during 1-4 and 4-7 wk periods; E.E.%; liver protein %; percentages of dressing and abdominal fat and plasma total protein, albumin, cholesterol, T3 and GH.
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| Publication year |
2006
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| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- الدقى - الجيزة
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| Availability number |
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| Organization Name |
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| City |
القاهرة
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| serial title |
13th Conference of the Egyptian Society of Animal Production Cairo 10-11 December 2006
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| Author(s) from ARC |
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| External authors (outside ARC) |
مرضى عبد العظيم قلمة
جامعة المنوفية
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| Agris Categories |
Animal physiology - Reproduction
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AGROVOC
TERMS |
Abdominal fat.
Albumins.
Alkaline phosphatase.
Blood proteins.
Broiler chickens.
Cholesterol.
Feed additives.
Light regimes.
Liver.
Physiological functions.
Production factors.
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| Publication Type |
Conference/Workshop
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