| 摘要 |
FIELD: agriculture, in particular, poultry farming. ^ SUBSTANCE: method involves keeping cocks from 17-week age to the end of utilization time in cages under intermittent illumination conditions with triple alternation of light and darkness periods; setting first light period of from 5 hours to 6 hours, second period of 8 hours to 12 hours and third period of from 13 hours to 17 hours. ^ EFFECT: reduced live weight, improved quality of sperm production, increased impregnation capacity of eggs and reduced feed consumption. ^ 3 tbl |
