Aśąď Ųŕ Ŗéĥmàń | University of Agriculture, Faisalabad, Pakistan (original) (raw)
Uploads
Papers by Aśąď Ųŕ Ŗéĥmàń
Fasting or maintenance energy expenditures have been shown to vary as a result of genetic potenti... more Fasting or maintenance energy expenditures have been shown to vary as a result of genetic potential for production, physiological state, sex, season, nutrition level and age. Much of the variation in those expenditures has been attributed to variation in body chemical composition or composition of gain; however, considerable evidence is available to indicate that these factors are not major sources of that variation. Evidence reviewed from a variety of experimental approaches indicates that the potential for variation in mass and energy expenditures of the liver and gastrointestinal tract has a major impact on total animal energy expenditures. Conservatively, about 20 to 25% of the total can be attributed to each of those organ systems. Those proportions are variable, depending on nutritional status, physiological state, etc. Some of the components of cellular energy expenditures in those organs are known, but functional integration of that knowledge is far from complete. Mechanisms by which these organs adjust to provide nutrients to the animal and the regulative interactions of these with other body organs and tissues are not well understood. (
This study investigated the influence of particle size and feed form on the performance, the AME ... more This study investigated the influence of particle size and feed form on the performance, the AME n , and the gross morphological and histological parameters of various segments of the digestive tracts of broilers fed wheat-based diets. The experimental design was a 2 × 2 factorial arrangement of treatments evaluating 2 wheat particle sizes (medium and coarse) and 2 feed forms (mash and pellet). The 2 particle sizes were achieved by grinding the whole wheat in the hammer mill to pass through 3-and 7-mm sieves. Broiler starter diets, based on wheat and soybean meal, were formulated and each diet was fed to 6 pens of 8 male broilers each from d 1 to 21 posthatching. Broiler performance was superior (P < 0.05) in birds fed pelleted diets compared with those on mash diets. Pelleting evened out the differences in
Fasting or maintenance energy expenditures have been shown to vary as a result of genetic potenti... more Fasting or maintenance energy expenditures have been shown to vary as a result of genetic potential for production, physiological state, sex, season, nutrition level and age. Much of the variation in those expenditures has been attributed to variation in body chemical composition or composition of gain; however, considerable evidence is available to indicate that these factors are not major sources of that variation. Evidence reviewed from a variety of experimental approaches indicates that the potential for variation in mass and energy expenditures of the liver and gastrointestinal tract has a major impact on total animal energy expenditures. Conservatively, about 20 to 25% of the total can be attributed to each of those organ systems. Those proportions are variable, depending on nutritional status, physiological state, etc. Some of the components of cellular energy expenditures in those organs are known, but functional integration of that knowledge is far from complete. Mechanisms by which these organs adjust to provide nutrients to the animal and the regulative interactions of these with other body organs and tissues are not well understood. (
This study investigated the influence of particle size and feed form on the performance, the AME ... more This study investigated the influence of particle size and feed form on the performance, the AME n , and the gross morphological and histological parameters of various segments of the digestive tracts of broilers fed wheat-based diets. The experimental design was a 2 × 2 factorial arrangement of treatments evaluating 2 wheat particle sizes (medium and coarse) and 2 feed forms (mash and pellet). The 2 particle sizes were achieved by grinding the whole wheat in the hammer mill to pass through 3-and 7-mm sieves. Broiler starter diets, based on wheat and soybean meal, were formulated and each diet was fed to 6 pens of 8 male broilers each from d 1 to 21 posthatching. Broiler performance was superior (P < 0.05) in birds fed pelleted diets compared with those on mash diets. Pelleting evened out the differences in