EFFECT OF THREONINE SUPPLEMENTATION ON JAPANESE QUAIL FED VARIOUS LEVELS OF PROTEIN AND SULFUR AMINO ACIDS. 1. GROWING PERIOD
Abdel-Mageed, M., Shabaan, S., Bahnas, M. (2007). EFFECT OF THREONINE SUPPLEMENTATION ON JAPANESE QUAIL FED VARIOUS LEVELS OF PROTEIN AND SULFUR AMINO ACIDS. 1. GROWING PERIOD. EKB Journal Management System, 21(2), 31-44. doi: 10.21608/fjard.2007.197551
Mohammed, A. A. Abdel-Mageed; Sayed, A. M. Shabaan; Mohammed, S. Bahnas. "EFFECT OF THREONINE SUPPLEMENTATION ON JAPANESE QUAIL FED VARIOUS LEVELS OF PROTEIN AND SULFUR AMINO ACIDS. 1. GROWING PERIOD". EKB Journal Management System, 21, 2, 2007, 31-44. doi: 10.21608/fjard.2007.197551
Abdel-Mageed, M., Shabaan, S., Bahnas, M. (2007). 'EFFECT OF THREONINE SUPPLEMENTATION ON JAPANESE QUAIL FED VARIOUS LEVELS OF PROTEIN AND SULFUR AMINO ACIDS. 1. GROWING PERIOD', EKB Journal Management System, 21(2), pp. 31-44. doi: 10.21608/fjard.2007.197551
Abdel-Mageed, M., Shabaan, S., Bahnas, M. EFFECT OF THREONINE SUPPLEMENTATION ON JAPANESE QUAIL FED VARIOUS LEVELS OF PROTEIN AND SULFUR AMINO ACIDS. 1. GROWING PERIOD. EKB Journal Management System, 2007; 21(2): 31-44. doi: 10.21608/fjard.2007.197551

EFFECT OF THREONINE SUPPLEMENTATION ON JAPANESE QUAIL FED VARIOUS LEVELS OF PROTEIN AND SULFUR AMINO ACIDS. 1. GROWING PERIOD

Fayoum Journal of Agricultural Research and Development
Article 3, Volume 21, Issue 2, July 2007, Page 31-44  XML PDF (461.08 K)
Document Type: Research articles.
DOI: 10.21608/fjard.2007.197551
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Authors
Mohammed, A. A. Abdel-Mageed1; Sayed, A. M. Shabaan1; Mohammed, S. Bahnas2
1Animal Prod. Res. Inst., Agric. Res. Center, Ministry of Agric, Doki, Giza, Egypt.
2Fac. of Agric., Poultry Production Dept., Fayoum Univ., Fayoum, Egypt.
Abstract
This study was conducted using 420 unsexed day-old Japanese quail
chicks which, equally divided into 7 groups of 3 replicates each, to
explore the extent to which dietary crude protein (CP) level can be
reduced in corn-soybean meal (C-SBM) starter-grower diets through
sulfur amino acids (SAA) and Threonine (Thr) supplementation while
maintaining adequate performance. One positive control diet (A) was
formulated to cover or exceed NRC (1994) recommendations of CP,
SAA and Thr. Two negative control diets (B and C) were formulated to
contain lower CP (22 and 20% CP, respectively) than NRC (1994)
recommended level but SAA and Thr were held at a constant ratio to CP
for obtaining the same ratio in the two diets. Two amino acidsupplemented diets (B1 and C1) were formulated to be similar in
composition to diets B and C, respectively but still supplying the same
SAA and Thr as in diet (A). Two other amino acid-supplemented diets
(B2 and C2) were formulated in a similar manner as in diets B1 and C1,
respectively but supplemented with additional Thr at levels of 0.2 and
0.4%, respectively to ensure that it contained higher Thr levels than the
NRC (1994) recommended level. Live growth performance, carcass
characteristics, some blood serum parameters and economical efficiency
were determined. From the nutritional and economical point of view, it
could be concluded that the performance of Japanese quail fed lowprotein diet (22% CP) supplemented with SAA as NRC (1994)
recommendations plus additional Thr at 0.2 over NRC (1994)
recommendations was similar to that achieved with the high-protein diet
(24% CP) and gave economical efficiency value near to that achieved
with the high-protein diet (24% CP).

Keywords
Protein; methionine; lysine; threonine; performance; carcass; blood; economic; quails
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