BIOCHEMICAL EFFECTS of DIFFERENT PROTEIN LEVELS AND ORIGINS IN POULTRY RATION

Abstract

The world demand for protein is increased due to continues growth in human population especially in the developing countries, whereas the growth and the demand for meat, milk and eggs is the greatest.

Broilers and layers are one of the most efficient animals in converting proteins and energy into edible food articles. Broilers show an efficiency of converting the feeds into human food reaching 11% for energy and 23% for protein and layers 18% for energy as high as 30% for protein, while beef cattle scored a maximum of 8o/o for energy and 15% for protein Maynard et al (1979).

Chicken meat is considered as one of the cheapest protein in most countries and may consider more tender, juicy and contains relatively low fat. Sexena (1996) Consumer demands for healthy and convenient products with desirable quality attributes are great challenges to the poultry industry. Mielnik et al (2002)

Feed ingredients have a great influence on poultry production since feed is the major expense in poultry industries.

Studies on the nutrition of an animal need not be limited to growth rate, nitrogen balance and efficiency of food utilization, but that it should sometimes be necessary to study the influence of nutrition on the metabolism of cells in various tissues as revealed by