Measurement of Nutritional Digestibility
Another set of three chickens each from intact control,
sham-operated, 50JR, and 80JR groups were fed on a
0.5% dietary chromium oxide diet for 3 days (Bolin
et al., 1952). Nitrogen (N) retention and apparent digestibility
of ether extract and dry matter (DM) were measured
from the fed diets, and total feces were collected
according to AOAC (1984) methods. The N retention
rate was calculated using the following formula: 100
100 (index percentage in diet (%)/index percentage in
feces (%) each nutrient percentage in feces (%)/each
nutrient percentage in diet (%)). Intestines of these birds