| Titles |
|
English :
|
Impact of phytase, cell wall-degrading enzymes or dietary formulation based on available amino acids on the utilization of rice bran in growing diets for broiler chicks
|
|
Arabic :
|
تأثير الفيتيز و الانزيمات المحللة لجدار الخلايا او تكوين العلائق على اساس الاحماض الامينية المتاحة على الاستفادة من رجيع الارز في علائق النامى لكتاكيت اللحم
|
|
| Abstract |
The objective of this work was to study the efficiency of different enzymes Natuphos® (phytase) at 600 FTU/kg, Optizyme (Opt) a cell wall degrading enzyme at 0.075%. and phospholipase A2 at 500 u kg diet on enhancing nutrient utilization of all vegetable diets containing 7,5, 15 or 30% rice bran during 28-49 d of age.
Also. diets containing 15 or 30% rice bran were formulated based on available amino acid value (AAAV) only, or combined with addition of phytase plus phospholipase for only 30% rice bran containing-diet. Each diet was fed to three replicates of 7 chicks each housed in floor pen. Available P percentage of phytase supplemented-diets was adjusted according to Phytasa equivalent value. by 0.10% . Growth performance, carcass traits, tibia criteria, plasma Ca, iP and alkaline phosphates and digestability of nutrients were considered for investigation . Also, sample for rice bran was assayed for ME and amino acid profile and availability.
Results indicated rice bran containing 12,62% CP; 15% ether extract; 0.26% methionine (Met), 0.63% Met+cystine, and 0.70% lysine (Lys). Methionine is the 1st limiting amino acid, isoleucine the 2nd , and lysine the 3rd in rice bran, Results showed that AAAA averaged 62.6%. whereas that for true available amino acid (TAAA) was 71.3%. Total phosphorus was 1.01%, phytic acid was 0.331% and phytase was 0.164 FTU/g of rice bran. Energy value was 12.06 and 12.46 MJ/kg rice bran for AMEn and TMEn, respectively. Phytase, Opt or the phospholipase completely overcame the negative effect on performance of diet containing 7.5% rice bran. Performance of broilers fed diets containing 15 or 30% rice bran was partially compensated, and crude fiber digestibility was improved when any of the enzymes was supplemented. Also, formulating broiler diets containing 15 or 30% of rice bran based on AAAV numerically improved growth, and significantly ameliorated feed utilization. Supplementing the diet containing 30% rice bran with phytase plus phospholipase besides formulating on AAAV resulted, in a further amelioration in feed utilization. Enzymes supplementation. Partially reversed the negative impacts of 15 or 30 % rice bran on ash. Ca and iP and alkaline phosphatase and this depends on the level of rice bran. Also, phystase supplementation to 15% rice bran containing- diet completely alleviated
Bancreas hyper trophy.
In conclusion enzymes and specially phytase may be useful mean to improve the utilization of vegetable diets containing different levels of rice bran for broilers.
|
| Publication year |
2002
|
| Availability location |
معهد بحوث الانتاج الحيوانى- شارع نادى الصيد- دقى- جيزة
|
| Availability number |
|
| Organization Name |
Animal Production Research Institute (APRI)
|
| serial title |
Archiv Fur Geflugelkunde 11 th European Poultry Conference Bremen
|
| Author(s) from ARC |
|
| External authors (outside ARC) |
يوسف عطية
زراعة دمنهور - جامعة الاسكندرية
فؤاد عبد الواحد عجور
جامعة المنصورة
|
| Agris Categories |
Animal feeding
|
AGROVOC
TERMS |
Amino acids.
Cell walls.
Enzymes.
Esterases.
Phytase.
|
| Proposed Agrovoc |
rice bran;
|
| Publication Type |
Journal
|