Effects of varying levels of dietary palm oil in concentrate rations on dry matter intake, nutrients digestibility and nitrogen retention in Red Sokoto goats

Abstract

Twenty Red Sokoto bucks (average liveweight of 21.4±3.2 kg) were used to evaluate the effects of varying levels of palm oil (PO) in concentraterations on nutrients digestibility and nitrogen retention. Five iso-nitrogenous concentrate supplements (CP 160 g/kg concentrate) compounded with 0, 40, 80, 120 and 160 g palm oil/kg of concentrate, were used to supplement a basal diet of wooly finger grass (Digitaria smutsii, Stent) hay. The five supplements were designated as treatments 0-PO (control), 40-PO, 80-PO, 120-PO and 160- PO. The bucks were each fed 536 g/d of hay, and 343 g/d of concentrate to give a ratio of 60:40 hay to concentrate. Results showed that inclusion of PO in the concentrate rations did not affect (P>0.05) total dry matter intake of the goats but intake values declined slightly with further increase in levels of PO beyond 40 g/kg concentrate. No adverse effects on total tract digestibility of nutrients were observed. Nitrogen retention of the goats was positive and not affected (P>0.05) by dietary levels of PO. It was concluded that inclusion of palm oil in the concentrate supplement beyond 40 g/kg level for the Red Sokoto goats marginally depressed total dry matter intake, but had no adverse effects on the total tract digestibility of nutrients and nitrogen retention.

Keywords: Goats, Palm oil, Nutrient digestibility, Nitrogen retention