Abstract
Laying hen diets containing 2850 kcal ME/kg a 3 protein levels (15.0, 13.5 and 12.0%), diluted with 0 or 6% builders' sand, were fed to six groups of 22-week old Single Comb White Leghorn pullets. There were no adverse effects on egg production, egg weight, percent eggshell, feed conversion, body weight, mortality and content of egg interiors when 6% sand was supplied in the diets for ten 28-day periods. Adjusted feed intake (substract sand portion from diluted feed) decreased 4% when 6% sand was added to the diets. Decreasing dietary protein caused a reduction in egg production, egg weight, feed intake, final body weight and protein content of egg interiors. However, percent eggshell, feed conversion and energy content of the eggs increased as dietary protein level decreased. There were no significant interaction effects between dietary protein levels and added dietary sand on laying hen performance. Three hundred and three day-old broilers were fed isocaloric diets (3200 kcal ME/kg) containing either 2.0, 21.5 or 23.0% protein to which 0 or 6 percent builders' sand was added. At three weeks of age, feed conversion (g feed/g gain), adjusted feed conversion and body weight were not affected by protein levels. However, feed conversion increased 3.6% and adjusted feed conversion decreased 2.1% when 6% sand was included in the diets, while body weight was not affected. Broiler body composition was not affected by the addition of six percent sand to the diets. Body protein and ash content increased when dietary protein level increased from 20.0% to 23.0%, while dry matter, ether extract and energy content decreased. In experiment 3, three hundred and thirty eight day-old broilers were fed 23% protein diets containing either 2871, 3008 or 3200 kcal ME/kg and supplemented with 0 of 6% builders' sand. At three weeks of age, body weight and body composition were not significantly different between the 0 and 6% sand groups. Feed conversion increased 2% and adjusted feed conversion decreased 4% when 6% sand was added to the diets. When dietary energy level increased, body weight at 3 weeks of age increased and feed conversion decreased significantly. . . . (Author's abstract exceeds stipulated maximum length. Discontinued here with permission of author.) UMI
Hsieh, How-Hon (1984). Effect of dietary sand on the performance of laying hens and the body composition of broilers fed various protein and energy regimes. Texas A&M University. Texas A&M University. Libraries. Available electronically from
https : / /hdl .handle .net /1969 .1 /DISSERTATIONS -408816.