Pellet Processing Improved True Metabolizable Energy of Jatropha Meal in Adult Rooster

The nutritional values of feed ingredient have influenced by the operation of processing technology. This study was conducted to evaluate effect of pellet processing of Jatropha meal on the apparent metabolizable energy (AME), AME corrected for nitrogen (AMEn), True metabolizable energy (TME), TME corrected for nitrogen (TMEn), and coefficient of total tract apparent retentions (CTTARs). The rooster bioassay was executed using 21 adult roosters (30 wk of age, average body weight: 2,302 g/bird). The experimental setup conforms to a Completely Randomized Design (CRD) with three treatments (7 roosters for each treatment). 1) Mash form, 2) Pellet form and 3) Negative control. Each rooster was fasted for 24h, and then force-fed 30g/bird of both mash (T1) and pellet (T2) samples. The other 7 roosters (negative control) were simultaneously fasted to determine endogenous nitrogen and energy losses. Whole excreta voided from mash form, pellet form and negative control groups were collected for 48h. The dry matter digestibility, and both apparent nitrogen retained (ANR) and true nitrogen retained (TNR) values of pellet form were higher (P < 0.05) than that of mash form. Pellet processing improved (P < 0.01) the values of AME, AMEn, TME and TMEn. The parameters of CTTARs were different (P < 0.001) between mash and pellet forms.