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Abstracts Contd.
THE EFFECT OF MICROBIAL PHYTASE ON UTILIZATION OF PROTEIN AND PHOSPHORUS IN BROILER RATIONS
N. M. El-Medany; and Sh. F. El-Afifi
Poultry Production Dept., Fac. of Agriculture, Ain Shams University, Egypt.
This study was conducted to evaluate the ability of supplemental microbial phytase to improve the utilization of protein and phosphorus that could be bound to phytate. The effect of microbial phytase on performance, retention of dry matter (DM), nitrogen (N), phosphorus (P) and calcium (Ca), tibia measurements and carcass characteristics was investigated in a starter period (0-3 wk of age) using 168 one-day old Hubbard broiler chicks fed corn-soybean meal diets. A 2 x 2 x 2 factorial arrangement of treatments was used with 0.30 and 0.45% non phytate P (nP), 19.5 and 23.0% CP, and 0 and 750 U of microbial phytase/kg of diet.
Phytase supplementation to low CP increased body weight gain (WG) by 11% while adding phytase to normal CP level (23%) increased WG by 4% compared with unsupplemented groups. Feed intake (FI) and feed conversion ratio (FCR) were increased by 8 and 3%, and 3 and 0.6% by adding phytase to 19.5 and 23% CP, respectively. However, the WG and FCR were still less than that achieved with 23% CP. Reducing nP had no effect on performance parameters. Reducing CP and nP while adding phytase had beneficial effect on DM, N, P and Ca retention. Phytase supplementation to low phosphorus diet (0.30%) improved the tibia breaking strength equal to positive control group (0.45%). Dietary phytase supplementation did not significantly affect bone ash. Either phytase, CP or nP did not affect carcass yield significantly. However, carcass yield was improved by adding phytase, increasing CP and reducing nP level.
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THE EFFECT OF INCORPORATING YEAST CULTURE, NIGELLA SATIVA SEEDS AND FRESH GARLIC IN BROILER DIETS ON THEIR PERFORMANCE
A. A., El-Ghamry; G. M., El-Mallah; and A. T., El-Yamny
Ani. and Poul. Nutrition and Prod. Dept., National Res.Center, Cairo, Egypt
A total number of two hundred and fifty two one day old Hubbard chicks were divided into seven equal groups with 3 replicates to study the effect of incorporating Diamond (DI) (live Yeast culture), Nigella sativa seeds (NSS) and fresh garlic (FG) in broiler diets on growth performance, carcass traits, digestibility and blood plasma parameters. The birds fed basal diet (control) or diets containing 0.1 or 0.2 % DI, 0.2 or 0.4% NSS and 2 or 4% FG.
Results revealed that there were significant increase (P>0.05) in body weight or weight gain at 6 weeks old by feeding diets either containing 0.4% NSS and 2 or 4% FG, while, no significant effect was noticed among other treatments. A significant improvement (P > 0.05) was recorded in feed conversion when chicks fed diets with high levels of NSS or FG. In addition, no mortality was observed for the groups fed the high levels of NSS and FG. Concerning carcass traits, the data indicated that no significant effect (P > 0.05) in breast %, liver % and heart % were observed among treatments. However, the highest inedible parts % were recorded for the group fed diet with 0.2% NSS. On the other hand, no significant differences were detected among groups in OM and NFE digestibility. While, a significant reduction in EE digestibility was recorded by feeding diet containing 0.2% DI and 0.2% NSS. Furthermore, the best plasma cholesterol and HDL levels were recorded for the groups fed diets containing 4% FG or 0.2% DI. Also, there was appreciable decrease in the activities GPT enzymes upon feeding diets containing either DI or NSS at low level compared with those of the control.
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NUTRITIVE VALUE OF SOAKED LINSEED CAKE AS AFFECTED BY PHYTASE, BIOGEN SUPPLEMENTION OR FORMULATING DIETS BASED ON AVAILABLE AMINO ACID ON BROILERS PERFOR MANCE
E. M. A. Qota, A. A. El-Ghamry*, and G. M. El-Mallah*
Animal Prod. Research Institute, ARC, Ministry of Agriculture, Egypt.
* Depart.of Ani. and Poult. Nutrition and Prod. , Nat. Res. Center, Cairo, Egypt.
This study aimed to evaluate soaked linseed cake (SLC) in broiler diets. It was prepared by soaking at 37ط·آ¢ط·â€؛C for 24 hr and dried at 60-70C until <10% moisture. Four levels of SLC were incorporated in the growing broiler diets at 0, 2.5, 5.0, and 10.0% during 1 to 42 days of age. Meanwhile, diets containing 10% SLC were fed without or with phytase, Biogen or formulated based on available amino acids.
The results indicated that, soaked linseed cake had no effect on growth, FCR, and feed intake of broilers when included in the diets for broilers. Either Phytase or Biogen improved growth numerically when added to 10% SLC containing-diet. Whereas, formulating broiler diets containing10% SLC based on available amino acids improved FCR numerically by 3.2%.
Percentages dressed carcass, heart, liver were not affected by SLC level, nor were there effects due to phytase or Biogen, or formulating broiler diets based on available amino acid basis. Chemical composition of broiler meats was not altered when 0 to 5% SLC was included in the broiler diets. Meanwhile, either phytase, Biogen or formulating the diet based on AAAV resorted moisture, crude protein, and either extract to the control level. Morover, meat WHC and tenderness as well as pH value and color intensity were not affected when SLC was included in broiler diets.
Crude fiber content of the excrement was signifcantly increased when 10% SLC containing-diet was fed, meanwhile, addition of phytase and Biogen restored it to the positive control level. Plasma total protein, total lipids, triglycerlids and cholesterol were not affected when SLC was included in broiler diets up to 10%. While, formulating broiler diets containing 10% SLC based on AAAV decreased plasma triglycerlids and cholesterol signifcantly.
It can be concluded that SLC can be fed at 5% in the diets for broilers without adverse effect on performance and meat quality traits of broilers, with expected improvement in economic efficiency.
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EFFECT OF SOME NUTRIENTS AS EGG SHELL IMPERFECTIONS AGAINSTS ON FAYOUMI LAYING PERFORMANCE AT THE END OF PRODUCTION CYCLE UNDER UPPER EGYPT CLIMATES.
A. H. H. Madian
Ani. Prod. Dept. Fac. of Agri., Assiut Branch, Al-Azhar Univ., Egypt.
This experiment was carried out to study the response of Fayoumi chickens for supplementation with 1.5% sodium bicarbonate (NaHCO3), 1.5% V.C, 0.5% V. E+Se and mixture of (0.75% NaHCO3+0.75% V. E. + Se) as egg shell imperfections against in drinking water from 70 to 78 weeks of age under Sahied Egypt. This study involved evaluation egg quality, eggshell quality, egg components and egg laying performance. Parameters were determined on 4- week interval basis. Results revealed the following:
NaHCO3 supplementation improved egg weight, egg shape index, egg surface area, Haugh units values, Albumin index, yolk index, yolk percentage, egg number, egg mass, egg production rate fertility and hatchability percents in the second month of experiment.
Ascorbic acid supplementation significantly increased shell thickness, shell percentage, SWUSA, Haugh units, Albumin index, Albumin percentage, Yolk colour, yolk percentage in the second month of experiment are and increased feed efficiency and fertility percent.
Addition of V. E+ Se significantly effected egg shape index, egg surface area, shell thickness, Haugh units values, Albumin index and yolk index in the second month of experiment and improved egg number, egg mass, egg production rate and hatchability percent.
There was not effect with the mixture treatment on all experimental parameters of Fayoumi laying performance at the end of egg production cycle under Sahied Egypt climates.
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