Influence of Mineral Supplementation on the Composition of Goat Milk.

Abstract

Eighteen monoparousLactating West Afriacan Dwarf (WAD) does, with average weight of 25\xa0 土 0.80kg\xa0 were used in a 12-week feeding trial to examine the effects of dietry mineral supplementation (Dicalcium phosphate and MgSO4 .7H2O) on milk production and composition of Ca. P and Mg The docs were grouped into three of six animal replicate/group and randomly assigned to each of the three isonitrogenous (15% CP) and isoenergetic 9.81MJ/kg ME) Supplementary diets (A,\xa0 B,, and C) respectively. The supplementary diet contained graded levels (0.5, 1, and 1.5% of Dicalcium phosphate and MgSO4.7H20 and fed with a basal diet of cyndom nlemfeuns grass in a completely randomized design. Results showed that treatment effects on dry matter intake (DMI (g/dry/kgB )circulating levels (mg/100ml) of ca, P and Mg in milk and sera of WAD does were significant (P <0.05), Variations observed on milk wal said were not significant (P >0.05. Significant (p<0,05) dry matter intake (DMI) (g/day/kgBW) values of 155.55, 174.77 and 193.34 were obtained for does on diets A, B and C respectively; While corresponding significant (P < 0.01) mean milk value of 185.30, 301.20, and 340.05 g/day were obtained significantly different (P<0.05) wear values of Ca, P and Mg levels obtained milk of WAD does on diets A, B and C were: Ca. 121.0, 127.0 and 132.0; P. 84.5, 89.78 and 94.08; and Mg: 18.90, 41.87 and 47.61(mg/100ml); while corresponding values in serumn were Ca: 9.75, 10.0 and 10.13. P: 7.15, 7.57 7.79; and Mg: 3.20, 3.52 and 4.54 (mg/100ml)respectively.Significant (P < 0.05) positive correlations (r- 0.99, 0.97 and 0.73) existed between and serum Ca, P and Mg contents respectively, suggested that blood is a Secondary source of milk mineral secretion in lactating animals. The general trend was that increasing dietary mineral supplementation resulted in concomitant Increase in dr matter consumption, milk yield and milk mineral (Cu, P. and Mg) contents with does and diet C recording In the best performance. Consequently, dietary Ca. P and Mg levels %DM) in supplementary lactation diet for indigenous WAD goats seemed \xa0to be best at 0.43, 0.35, and 0.17 respectively\xa0