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Wayamba Journal of Animal Science

NUTRITIVE VALUE ASSESSMENT OF SOME SELECTED TROPICAL WEEDS USING in vitro GAS PRODUCTION TECHNIQUE

A. Akinfemi, D.O Ogunbosoye and T.I. Hassan
WJAS ID 1538766391 Date : 2018-10-22 Volume : 10

The nutrient value of Amaranthus spinosus (AMT), Aspilia africana (ASA), Gomphrena celosiodes (GOC), Ipomea tribola (IPT), Luffa cylindrca (LUF), Plastosoma africanum (PTA) and Sida acuta (SID) were evaluated using standard methods. The gas production from the fermentation of the weed samples and the proximate composition of oven dried samples were investigated. The estimated organic matter digestibility (OMD), short chain fatty acid (SCFA) meterbolizable energy (ME) were derived from the results of the proximate composition and in vitro gas production at 24hr of incubation. The crude protein contents (%) ranged from 8.75 (AMT) to 12.9 (SID). The crude fiber contents differed significantly (p< 0.05) among the investigated weed samples with the highest value obtained in GOC (14.70) and the least recorded in ASA (8.35). The ether extracts (%) were 1.65 (AMT), 2.21 (SID), 1.33 (GOC), 1.59 (IPT), 1.43 (LUF), 1.67 (PTA) and 2.12 (SID). The insoluble but degradable fraction (b,ml) was highest in GOC (38.0) followed by ASA (37.0). The estimated OMD (%), ME (MJ/Kg DM) and SCFA (mmol) ranged from 49.99 (SID) to 68.94 (ASA), 7.86 (IPT) to 12.31 (GOC), and 0.61 (SID) to 1.18 (GOC) respectively. The most abundant mineral in the investigated weeds are potassium and sodium. Phytate and oxalate contents were generally low, ranging from (2.0 to 3.0) and 1.0 to 0.3 respectively. From the results obtained in this study, GOC, ASA, IPT, LUF and SID were potential sources of protein with a correspondence high estimated OMD, ME and SCFA. Therefore it could be incorporated in complete feed mixtures in ruminant diets without major problems.

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