Effect of Various Levels of Energy on the Digestibility of Structural Carbohydrates and Milk Yield in Goats

Eighteen lactating Beetal goats in their early stage of lactation wee randomly distributed into three groups I, II and III. These animals were fed on a ration providing standard protein requirement but the three different levels of energy in the 3 groups for a period of 40 days at the end of which a metabolism trial was conducted. The intake of DM, DCP and TDN in the three groups I, Hand III were 1J0.74±4.40, 7.32±0.19, 88.08±1.63; 94.41±4.28, 74.3±0.38, 74.15±2.76 and 7.43±5.25, 7.24±9.25 and 61.35±1.25 g/kg W^0.75 per day, respectively. The differences among the three groups in the intake of TDN were significant (P<0.01). There was a significant difference in the digestibility of cellulose (P<0.05), EE(P<0.01) and CP (P<0.05), highest being in group I. The yield of milk, fat, TS, SNF and protein were 772.50±61.44, 27.03±1.69, 104.90±8.95, 77.54±7.14, 27.36 ±1.98 g/day group I;535.0±73.64. 21.53±.2,36 75.54±9.02 52.58±6.86 19.02±2.64 g/day in group II and 393.33±32.41 16.85±1.55, 54.24±4.47 37.39±3.05 and 12.68±1.02 g/day in group III respectively. The data revealed that the differences in yeld of milk fat TS SNF and protein content were significant (P<0 01).