EFFECT OF DIETARY LACTOBACILLUS SUPPLEME~TION ON PERFORMANCE OF LAYING HENS UNDER EGYPTIAN SUMMER CONDITIONS.. | ||||
| Journal of Animal and Poultry Production | ||||
| Article 8, Volume 28, Issue 5, May 2003, Page 3433-3443 PDF (647.91 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/jappmu.2003.244151 | ||||
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| Author | ||||
| N. M. EI-Medany, | ||||
| poultry Production Dept., Fac. of Agric., Ain Shams Univ., Cairo. | ||||
| Abstract | ||||
| A 8-wk study was conducted to evaluate the effects of supplementing laying hen diets with commercially produced Lactobacillus acidophilus (Micro-Bac LA) on productive periormance. egg quality and some blood constituents unde Egyptian summer conditions. One hundred and thirty five Hy-Line® Brown pullets (48wk of age) were randomly allocated to one of five levels of Lactobacillus aGido~~ilus (LA) supplementation (0. 100, 200, 300 and 400 mglKg diet). The mean cell ~unt in the Lactobacillus preparation was 8x108 cfu Ig. The group fed a basal dietlwithout LA supplementation was considered as control group. Egg number, egg ,hass, feed intake and feed conversion ratio were significantly (P<0.05) improved by about 7.3, 9.3, 10.9 and 11.0%; 9.9, 10.2, 11.9 and 13.2%; 3.6. 3.3. 3.6 and 2.2% a~d 5.5, 6.3, 7.7 and 9.7% in groups fed diets supplemented with 100, 200. 300. and 100 mg LAJ Kg diet • respectively, compared to control group. Egg weight Of hens fed supplemented diets was increased during the experimental period (48 to 56 wks of age) however. the significant effect was observed only in groups fed 100 flnd 400 mg LAJKg diet. Lactobacillus supplementation significantly increased albu en quality, shell thickness and breaking strength at 52 and 56 wks of age. On the other hand, there were no Significant differences among treated groups for albumin. yolk and shell percentages. Albumen height was significantly (P<O.05) increased at 52 w s of age by LA supplementation. Plasma Ca, total protein and globulin were significantly (P<0.05) Increased in groups fed treated diets compared with control group. Lactobacillus supplementation significantly (p < O.05) decreased plasma phosphorus and AJG ratio. In contrast. plasma albumin was not significantly affected by feeding LA-supplemente<,:l diets. 80th plasma and yolk cholesterol were significantly decreased with LA supplementation. Plasma cholesterol was reduced by about 9.9, 14.5, 17.8 and 21.7% a'ld 18.3, 17.4. 24.4 and 29.9% and yolk cholesterol by about 16.5. 37.6, 40.9 and 43.a% and 26.2. 40.4, 36.9 and 41.5% for groups fed 100.200,300. and 400 mg LN Kg diet at 52 and 56 wk of age, respectively. In conclusion. these results suggested that Lactobacllfus supplementation (0 laying hen diets had a beneficial effect on productive periormance, egg quality under Egyptian summer conditions. In addition, Lactobacillus supplementation reduced yolk cholesterol and consequently. reducing the dietary Intake of cholesterol tl humans | ||||
| Keywords | ||||
| LactobaCillus. ambient temperature; productive periorman; egg quality; blood constituents; laying hen | ||||
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