Utilization of phosphorus by pregnant West African dwarf goats

Abstract

A total of twelve West African Dwarf (WAD) goats of about 10 months old were involved in this experiment. On attaining a body weight of 18kg, oestrus was synchronized and service affected by twin herd bucks. Does confirmed pregnant were randomly allotted to one of three isocaloric and isonitrogenous diets. These diets contained three increasing levels of phosphorus (P) as treatment A (0.28%), B (0.55%) and C (0.81%). Balance trials were carried out at weeks 8, 12, 16, and 19 of gestation. Results showed that treatment effects on P balance and apparent digestibility were highly significant (P<0.01). The trend observed showed an increase in P balance with increasing dietary level of P. There was however a decrease in apparent digestibility with increasing dietary P inclusion. Variations recorded for the mean daily gains of does on treatments A, B, C, were not significant (P<0.05). Serum P as within the range 4-6mg 100^-1 recommended for the goats.

 Key words: Phosphorus, pregnancy, goats, requirement.