4Keshavarz K.The effect of light regimen, floor space, and energy and protein levels during the growing period on bodyweight early egg size [J]. Poultry Science,1998,77: 1266- 1279.
6Chwalibog A.Factorial estimation of energy requirement for egg production [J]. Poultry Science, 1992,71 (3): 509 - 515.
7Grobas S,Mendez J,De Bias C,et al. Influence of dietary energy supplemental fat and linoleic acid concentration on performance of laying hens at two ages [J] . British Poultry Science, 1999,40 (5):681 - 687.
8Hocking PM, Bernard R S, Will-de R S,et al. Plasma growth hormone and insulin-like growth factor-1 concentrations attheset of lay in and ad libitun and restricted broiler breeder fowl [J]. British Poultry Science, 1994,5:299 - 308.
9Williams J, Sharp P J, Goddard C. The effects of growth hormone on ovarian folliculargrowth in the domestic hen [Z]. J Reduction and Fertility (Abstract Series No. 9), 1992.9.
