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Written Paper

Whole grains, unprocessed rapeseed and beta-glucanase in diets for laying hens  [1988]

Al Bustany, Z. Elwinger, K. (Sveriges Lantbruksuniv., Uppsala (Sweden). Inst. foer Husdjurens Utfodring och Vaard)

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An experiment was conducted with two strains of caged laying hens (Lohmann Selected Leghorn, LSL and an experimental cross bred strain, L324) kept from 20 to 80 weeks of age in order to compare diets based on either barley, wheat, oats or the three cereals mixed together. The cereals were incorporated in a whole or ground form except for oats, which were only fed whole. Diets based on barley were fed with or without the addition of a beta-glucanase enzyme preparation and the diets based on the whole mixed cereals we2048re fed with or without the inclusion of whole rapeseed. Hens fed the mash diets were superior to those given diets containing whole cereals in laying performance, except for egg weight. They also consumed less feed, had lower mortality rates and better egg shell and interior quality traits. Wheat fed hens had superior feed conversion ratios (FCR), but similar metabolizable energy (ME) utilization and production performance compared with barley fed hens. The barley based diets were also comparable to the mixed cereal diets in their effects on laying performance, live weight gain and plumage condition, but the wheat diets were inferior to the mixed cereal diets with respect to egg output. The comparison between barley, wheat, oats and mixed cereal based diets in the whole grain form indicated that diets based on oats were superior to the other three diets with respect to laying performance in spite of lower consumption of ME, crude protein (CP
) and lysine. The incidence of damaged and cracked eggs and percentage of yolk was lower and concentration of CP in the albumen higher for hens fed whole oats compared to the other diets. The incidence of dirty eggs was higher with barley fed hens than those fed on the other diets. Addition of beta-glucanase enzyme to the barley based diets had no significant effect on the performance of the hens

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Swedish Journal of Agricultural Research (Sweden)

ISSN : 0049-2701

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