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In vitro gas production from cassava peels supplemented with unconventional nitrogen sources and forages by small ruminants

A study was conducted to ascertain the nutritional value of N-source treated and forage supplemented cassava peels (CSP) using in vitro gas production technique. Cassava peels were treated and supplemented with materials rich in nitrogen: fertilizer grade urea (T1 = CSP + U), broiler litter (T2 = CSP + BL), cassava forage (T3 = CSP + CSF) and sweet potato forage (T4 = CSP + SPF). Results revealed that, CSP supplemented with CSF (T3) and SPF (T4) recorded better gas production (31.90 and 32.20 mL/200 mg DM), metabolizable energy (ME) (7.54 and 7.67 MJ/kg DM), and organic matter digestibility (OMD) (52.02 and 52.80%), respectively. Similarly, the estimated short chain fatty acids (SCFA) revealed higher values of 0.70 and 0.71 µM, respectively, for cassava and sweet potato forage supplementation compared to those fed urea and broiler litter-treated cassava peels. The superiority exhibited by the forage supplemented cassava peel diets for meeting the ME levels, SCFAs and OMD reveals that, cassava peels supplemented with either cassava leaves or sweet potato forage are valuable sources of nutrients for sheep and goats in terms of meeting their energy requirements for maintenance and part or all their milk production needs depending on the level of productivity.