EFFECTS OF Gmelina arborea AND Moringa oleifera LEAF MEAL INCLUSION ON INTAKE, DIGESTIBILITY AND NITROGEN BALANCE OF RED SOKOTO BUCKS FED Digitaria smutsii HAY BASED DIETS

Authors

  • Okafor, E. C. Department of Animal Science, Ahmadu Bello University, Zaria, Nigeria,
  • Lakpini, C. A. M.
  • Abdu, S. B.
  • Lamidi, O. S.

Keywords:

Red Sokoto bucks, Gmelina aborea, Moringa oleifera, Intake, Nutrient digestibility, Nitrogen balance

Abstract

Twenty Red Sokoto bucks aged between 7 and 8 months with an average weight of 15.20±0.80 kg were used to ascertain the effect of level of inclusion (0, 10, 20, 30%) and ratio of Gmelina arborea and Moringa oleifera leaf meal (75:25) on nutrient intake, nutrient digestibility and nitrogen balance in Digitaria smutsii hay based diets. The bucks were randomly assigned to four treatments balanced for weight with five bucks per treatment in a completely randomized design. Nutrient intake increased with increasing level of Gmelina and Moringa leaf meal inclusion but declined in T4 (30%). There was no significant (p<0.05) difference in dry matter intake and organic matter intake across the dietary treatments. Dry matter intake ranged from 310.28 g/d in T1 to 372.61 g/d in T3. Diet with 20% leaf meal inclusion had significantly (p<0.05) higher dry matter but similar crude protein intake (49.37g) to that of 10% inclusion (46.70) which was similar to other treatments. The crude fibre, Neutral detergent fibre and Acid detergent fibre intakes were significant and followed similar pattern with crude protein. Dry matter digestibility was significantly (p<0.05) higher in animals fed T2 (75.86%) and T3 (73.16%) than other treatments. Organic matter digestibility (OMD) showed significant difference (p<0.05) across treatments. Animals fed T3 and T2 showed significantly higher OMD 84.98% and 84.97% respectively than the other treatments. Crude protein digestibility was similar and ranged from 72.60% in T4 to 77.62% in T3. Crude fibre digestibility was different significantly (p<0.05) across the treatments with highest value at T3 (76.15%). NDF digestibility was significantly higher (p<0.05) with diets containing Gmelina and Moringa leaf meal than the control. ADF digestibility followed the same pattern with the NDF digestibility. The result of N intake was significantly (p<0.05) different in animals fed T3 (20%) with higher nitrogen intake (7.90g/d) than other treatments. Nitrogen retention was positive across the treatments with animals on T3 having significantly (p<0.05) higher but similar nitrogen retention (5.37g/d) to T1 and T2. Nitrogen retention was least in animals fed 30% inclusion of Gmelina and Moringa leaf meal. It can be concluded from the results of this study that inclusion of Gmelina and Moringa leaf meal at 20% in Digitaria smutsii hay based diets had no adverse effect on intake, nutrient digestibility and nitrogen balance in goats.

Published

2017-06-30