Nutritional Evaluation and Effect of varying fortified feeds of Ziziphus mauritina fruit (mesocarp) on Growth performance of albino rats

Tajudeen Owolarafe, Muhammad Wudil, Adamu Alhassan, Abdullahi Imam

Abstract


This study evaluated the nutritional value of ziziphus mauritina fruit (mesocarp) and its effect on the growth of experimental animals. Proximate analysis of the mesocarp was carried out using standard methods. The fat content were analysed using GCMS, carbohydrate content were analysed using carbohydrate Digestibility assay and the protein content were determined using amino acids profile analysis. The mesocarp of Zizphus mauritiana was dried and added to standard commercial feed (mesocarp: commercial feed) at 0% (0:100), 20% (20:80), 30% (30:70), 40% (40:60) and 50% (50:50) respectively and were fed to albino rats to evaluate the effects on growth performance of the animal. The results revealed the presence of carbohydrate (55.00 ± 0.24%), crude fat (5.13 ± 0.02%), crude protein (17.50 ± 0.32%), crude firbre (11.40 ± 0.04%), ash content (6.27 ± 0.31%) and moisture (4.70 ± 0.25%). The amino acids profile reveals the presence of essential amino acids with leucine (5.60 g per 100 g sample) as the most abundant and tryptophan (0.74g/100g sample) as the least concentrated while the non essential amino acids present in the sample reveals cystine as the lowest (1.09 g per 100 g sample) and glutamic acid is the most concentrated and abundant  non essential amino acid with 10.00 g per 100 g sample. GCMS analysis of the crude fat reveals the presence of hexanoic acid, hepta-2,4-dienioc acid, hexadecanioc acid(palmitic acid), 9,12-Octadecadienoic acid,(Linolelaidic acid), 11,14,17-Eicosatrienoic acid, octadecanoic acid (Stearic acid), Di-n-octyl phthalate (1, 2-Benzenedicarboxylic acid, dioctyl ester) while the carbohydrate digestibility assay reveals resistant starch (1.64 mmol/L per 100mg) and digestible starch (18.81 mmol/L/ 100mg) of the sample. The sum of the RS content and DS content gives the total starch of 20.44 mmol/L per 100 mg of the sample. Protein efficiency ratio (PER), feed efficiency ratio and consumption index analyses showed that there is no significant difference in all the blends of the feed samples used. The effect of mesocarp of ziziphus mauritiana fruit on growth exhibit low growth performance and this is corroborated by the profiles of the major component of the fruit which consist mainly of non-essential biomolecules which can improve growth.

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