Influence of dietary energy, protein and limiting amino acid levels on weight gain and retention of lysine, methionine and cystine in broilers during cold season

Baghel, R.P.S.; Pradhan, K.

Indian Journal of Animal Sciences 60(2): 243-245

1990


ISSN/ISBN: 0367-8318
Accession: 002409656

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Abstract
Diets containing metabolizable energy (ME) 2800, 3000 or 3200 kcal/kg and 20, 22, 23 or 25% crude protein (CP) from 0 to 3 weeks old, 18, 20, 22 and 24% CP from 3 to 6 weeks old and 16, 18, 19 and 21% CP from 6 to 8 weeks old, respectively, were given to 630 broilers. Except for diets containing 23% CP in the starter, 20% CP in the grower and 18% CP in the finisher phases all other diets were given with limiting amino acids content at 1% of diet or at 1% of CP. For diets with ME 2800, 3000 and 3200 kcal/kg body weight gain was 393, 392 and 413 in the starter phase, 815, 864 and 882 in the grower phase and 655, 645 and 632 in the finisher phase, respectively. In the starter phase retention of lysine with diets containing 20 and 22% CP and retention of cystine at 20% CP were higher than with the other diets. In the grower and finisher phases increasing CP from 18 to 20 and from 16 to 18%, respectively increased retention of lysine and cystine.