Metabolizable Energy and Digestibility Evaluation of Fish Meal for Chickens

Effects of Moderate Lysine Deficiency on Digestibility and Metabolisable Energy of Diets and on Nitrogen Retention and Uric Acid Excretion in Chicks

“…This makes the estimate of the apparent digestibility of crude protein inaccurate. As shown in this experiment, the direct way of estimating fecal protein (Ekman et al, 1919) and the indirect way (Potter et al, 1962) gave different digestibility coefficients for the protein in the diets.…”

“…This test showed a 95.5% recovery of the uric acid with a standard deviation of 2.2%. The determination of the fecal part on nitrogen in feces was carried out either by employing the procedure of Ekman et al (1949)l or based on the assumption, that 80% of the urinary nitrogen excreted by chicks, is in form of uric acid as suggested by Potter et al (1962). Under the calculations of the apparent digestible coefficients for crude fat, crude fibres, and nitrogen-free extracts, it was assumed that of these nutrients in the excreta nothing belonged to the urine part.…”

Metabolizable Energy, and Protein and Fat Digestibility Evaluations of Fish Solubles in Diets of Young Turkeys

“…The coefficients of digestibility of the protein and of fat in the diets were determined from the chemical analyses following the equation outline by Potter et al (1962).…”

Metabolizable Energy Values and Coefficients of Digestibility for Protein and Fat of Starfish Meal and Starfish Meal Combined with Fish Meal

“…The procedures employed in sampling the diets and excreta and the methods used to determine dry matter, heats of combustion, chromic oxide, nitrogen, fat, and uric acid are described by Potter et al (1962). Metabolizable Calories per gram of dry diet, corrected to nitrogen equilibrium, were calculated using the equations outlined by Hill and Anderson (1958).…”

“…Coefficients of digestibility for nitrogen were calculated with the assumption that: (1) 80 percent of the urinary nitrogen excreted by the chick is in the form of uric acid, and (2) metabolic and urinary fat is negligible and all of the fat in the excreta is fecal fat. The equations for calculating the amounts of nitrogen and fat digested per gram of diet are outlined by Potter et al (1962).…”