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RYE as altrnative ceral grain with or without xylanase enzyme supplementation in laying hens diets
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Abstract: This experiment was conducted to investigate the best inclusion level of rye in laying hens diets when used without or with xylanase supplementation. The effects of five different levels of rye (0, 10, 15, 20 or 25% of diet) on performance of laying hens were examined. Each level was fed without or with xylanase (Econase XT25, at level 100 mg/Kg diet to provide 16000 U xylanase/Kg diet) supplementation in a 5x2 factorial design. A total number of 400 Dokki 4, developed local strain, layers (40 wks old) were distributed into 10 treatments of 40 hens each in four replicates. Diets were formulated to contain 15 % CP and 2700 Kcal ME/Kg. Productive performance parameters were recorded during the experimental period, while parameters of egg quality and economic efficiency were recorded at the end of the experiment. Results could be summarized as follows:
- There was a negative consequence on productive performance with leveling up the dietary rye inclusion rate. Egg production, egg weight, feed intake, and feed conversion ratio were significantly worsened with increasing the level of rye in the layers diet.
- Results of simple regression analysis of egg production and feed conversion ratio confirm the mentioned trend of depressed performance by increasing rye % in the diet.
- Xylanase supplementation significantly improved egg production, daily egg mass, feed intake, egg weight and feed conversion ratio compared to without xylanase feeding group.
- Feeding rye had further disadvantageous impact 011 some external and internal egg quality traits. It decreased significantly shell weight, yolk weight, and albumin weight and yolk color index, while xylanase supplementation had no additional effect on external and internal egg quality traits except albumin weight.
- Data on the interaction between dietary rye level and xylanase supplementation showed that even if there are some improvements in variables studied with xylanase supplementation to rye diets, it is stilI the best results are associated with the control without or with xylanase diet.
- The calculated economic efficiency (EE) showed shrinking of the adverse effect of rye on EE when using supplemental xylanase to the diet containing rye.
In conclusion, the present results shows that rye grain when fed to layers is poor quality feed and its nutritive value could be slightly improved by xylanase supplementation.
Key words: laying hen, xylanase, egg production, egg quality
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| Publication year |
2012
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| Pages |
1-15
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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 |
الاسكندرية
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| serial title |
3rd Mediterranean Poultry Summit &6th International Poultry Conference
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| Author(s) from ARC |
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| Agris Categories |
Animal feeding
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AGROVOC
TERMS |
Economic analysis.
Egg production.
Layer chickens.
Performance testing.
Rye.
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| Proposed Agrovoc |
egg quality;xylanase;egg quality;
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| Publication Type |
Conference/Workshop
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