4Novak C,Scheideler S E. Long-term effects of feeding flaxseedbased diets. 1. Egg production parameters, components and eggshell quality in two strains of laying hens . Pouh Sci,2001.80(10):1480-1489.
5Jones D R,Tharrington J B,Curtis P A,et al. Effect of cryogenic cooling of shell eggs on egg quality[J]. Pouh ,Sci, 2002,81(5) :727-733.
6Lim H S, Namkung H, Paik I K. Effect of cholecalciferol-enriched hen feed on egg quality[J]. J Agric Food Chem,2003,51(1) :283-287.
7Sahin K, Sahin N, Onderci M. Vitamin E supplementation can alleviate negative effect of heat stress on egg production,egg quality, digestibility of nutrients and egg yolk mineral concentrations of Japanese quails [J ]. Res Vet Sci, 2002,73 (3) : 307-312.
