*3.7. Nitrogen Utilization*

Dietary treatments did not affect (*p* > 0.05) nitrogen intake, total nitrogen loss, fecal nitrogen, nitrogen absorption, or nitrogen retention but significantly affected urinary nitrogen (Table 7). Urinary nitrogen was significantly observed between FDP and FDPML, 2.58 g/d and 2.32 g/d, respectively. Apparent nitrogen absorption expressed as % of nitrogen intake was significant among treatments, in which FDPML had the highest apparent nitrogen absorption, 73.63% of nitrogen intake, respectively.

**Table 7.** Effects of untreated and treated discarded durian peel in TMR on nitrogen utilization in growing goats.


FDP = untreated discarded durian peel; FDPM = treated discarded durian peel with molasses; FDPC = treated discarded durian peel with cellulase; FDPL = treated discarded durian peel with *L. casei* TH14; FDPML = treated discarded durian peel with molasses and *L. casei* TH14; SEM = Standard error of the mean. a,b Means in the same row with different letters differ (*p* < 0.05).
