USING THREONINE, CANTHAXANTHIN AND SODIUM SULPHATE, TO IMPROVE SECOND PRODUCTION CYCLE PERFORMANCE OF AGED HENS DURING SUMMER SEASON
youssef, S., El-gabrey, H., Abdel Latif, H., ali, M. (2020). USING THREONINE, CANTHAXANTHIN AND SODIUM SULPHATE, TO IMPROVE SECOND PRODUCTION CYCLE PERFORMANCE OF AGED HENS DURING SUMMER SEASON. EKB Journal Management System, 40(3), 647-662. doi: 10.21608/epsj.2020.114324
Sabbah farouk Farouk youssef; Hoda El-said El-gabrey; Hesham Ahmed Abdel Latif; mohamed nabil ali. "USING THREONINE, CANTHAXANTHIN AND SODIUM SULPHATE, TO IMPROVE SECOND PRODUCTION CYCLE PERFORMANCE OF AGED HENS DURING SUMMER SEASON". EKB Journal Management System, 40, 3, 2020, 647-662. doi: 10.21608/epsj.2020.114324
youssef, S., El-gabrey, H., Abdel Latif, H., ali, M. (2020). 'USING THREONINE, CANTHAXANTHIN AND SODIUM SULPHATE, TO IMPROVE SECOND PRODUCTION CYCLE PERFORMANCE OF AGED HENS DURING SUMMER SEASON', EKB Journal Management System, 40(3), pp. 647-662. doi: 10.21608/epsj.2020.114324
youssef, S., El-gabrey, H., Abdel Latif, H., ali, M. USING THREONINE, CANTHAXANTHIN AND SODIUM SULPHATE, TO IMPROVE SECOND PRODUCTION CYCLE PERFORMANCE OF AGED HENS DURING SUMMER SEASON. EKB Journal Management System, 2020; 40(3): 647-662. doi: 10.21608/epsj.2020.114324

USING THREONINE, CANTHAXANTHIN AND SODIUM SULPHATE, TO IMPROVE SECOND PRODUCTION CYCLE PERFORMANCE OF AGED HENS DURING SUMMER SEASON

Egyptian Poultry Science Journal
Article 5, Volume 40, Issue 3, September 2020, Page 647-662  XML PDF (628.47 K)
Document Type: Original Article
DOI: 10.21608/epsj.2020.114324
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Authors
Sabbah farouk Farouk yousseforcid 1; Hoda El-said El-gabrey2; Hesham Ahmed Abdel Latif3; mohamed nabil ali4
1poultry breeding department - animal production research institute- agriculture research center
2Department of poultry nutrition, Animal production research institute, Agriculture research center
3poultry breeding- animal production research institute- agriculture research center.
4Anim.Prod. Res. Inst., Agric. Res. Center, Ministry of Agric., Dokki , Giza, Egypt.
Abstract
This study testified the hypothesis that L threonine (Thr) and canthaxanthin (Cx) alone or in combination   in absence or present of anhydrous sodium sulphate (SS), can improve the performance of local laying hens in their second laying cycle   (100- 112 weeks). One hundred and ninety two aged Golden Montazah layer hens that reached 100 weeks of age were chosen and distributed randomly into 8th experimental groups. Each group contained 24 hens divided into 3 replicates of 8 hens each. The 1st group fed control diet, the groups from the 2nd to 8th fed control diet supplemented with Thr, Cx, Cx+Thr, SS, SS+Thr, SS+Cx,  or SS+Thr+Cx respectively. Egg production performance, egg quality, plasma protein respiration rate and body temperature were estimated.

The results indicated that Thr supplementation improved significantly egg production percent, egg mass and increased significantly feed intake. Feed conversion ratio improved during the first month by supplemented control diet with Thr, and Cx. Moreover plasma globulins and heat tolerance during summer season improved by Thr supplementation. Combination of Thr and Cx supplementation led to attain more improvement in egg production performance. Compared to the control diet, combination of Thr and Cx supplementation increased egg mass per hen by 25.18 %. However, no improvement was detected in egg production performance of aged Golden Montazah during summer season due to SS supplementation the control diet.
The results proved the hypothesis that egg production performance of aged Golden Montazah hens improved by threonine and/or canthaxanthin supplementation.                 
Keywords
aged hens; threonine; canthaxanthin and sodium sulphate
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