EFFECTS OF DIETARY THREONINE LEVEL, METHIONINE SOURCES, SEX OF BROILER CHICKS AND THEIR INTERACTIONS ON CARCASS TISSUE DISTRIBUTION AND CHEMICAL COMPOSITION | ||||
| Egyptian Poultry Science Journal | ||||
| Article 11, Volume 37, Issue 1, March 2017, Page 155-167 PDF (590.43 K) | ||||
| Document Type: Original Article | ||||
 View on SCiNiTO | ||||
| Authors | ||||
Mrwan Abdelaziz Mahmoud Abdelaziz ; Nematallah Gamal El-Din Mohamed Ali; Ahmed Ibrahim Soliman El-Faham
| ||||
| Poultry Production Department, Faculty of Agriculture, Ain Shams University, Cairo, Egypt | ||||
| Abstract | ||||
| A total sum of 180 Hubbard broilers chicks (46.9 ± 2.5 g) at one-day-old were used, weighed and divided into six treatments of three replicates each to investigate effects of using two levels of amino acid threonine (T) being (0.0 or 1.0 g/ kg diet) and three different methionine sources: DL- methionine (DLM), acid liquid methionine (ALM) or methionine hydroxy-analogue-calcium salt (MHA) in 2 x 3 factorial design on carcass tissue weight distribution and chemical composition for both male and female broiler chicks, fed corn-soybean meal based diets. Results obtained declared that skin and subcutaneous fat percentages of carcass parts were not altered by neither different dietary treatments nor bird sex. Also, distribution of both muscles and bones was not altered by different dietary treatments as male and female chicks appeared similar, except for muscles percentages of breast and drumstick where, males recoded significantly higher values than female chickens. Additionally, all parameters of tibia bone measurements (tibia length, tibia width, tibia Seedor index (SI) and tibia Robusticity index (RI)) were not significantly affected by different dietary treatments, while male chickens had a significant higher figures (tibia length, width, (SI) and dry tibia weight percentage (DTW %)) than female chickens. Data of chemical composition of both tibia bone and breast meat were presented insignificant effect of either different dietary treatments, or bird sex. While most of studied parameters showed insignificant response due to interactions between threonine levels (T), methionine sources (M) and sex of birds (S). According to results obtained, it would be stated that interactions between dietary threonine (T) supplementation, methionine (M) sources and sex (S), for nearly all studied parameters, were insignificant. | ||||
| Keywords | ||||
| Bones- L-threonine- Methionine sources- Muscles sex- Skin | ||||
|
Statistics Article View: 119 PDF Download: 240 |
||||
