ENERGY BALANCE AND GLUCOSE METABOLISM OF LACTATING ETAWAH CROSSBRED GOATS FED BY TEMPE WASTE

Abstract

A study involving energy balances and radioisotope-labelling techniques was
undertaken to examine the energy metabolism and glucose kinetics on lactating
Etawah crossbred goats, using 16 first lactating does (BW 50.0 i 5 kg). Animals
were randomly allotted into four dietary treatment groups that received 50 % King
grass plus R1 : 50% concentrate, R2 1 25 % concentrate and 25% fresh tempe waste, R3 : 25 % concentrate and 25% fermented tempe waste, and R4 : 25% concentrate and 25% gelatinising of liquid tempe waste. The rations ofiered were containing 16 Ml/kg of GE. Energy balance studies were conducted during a two—week trial for measuring the digestibility and metabolism of energy. Measurement of glucose kinetics using radioisotope technique involved 8 animals that were injected with glucose-2-3H and milk production was collected 2 times a day. The result showed that R3 was the highest in GE intake compared to the rest of the group. Digestibility energy of R1 and R3 was significantly difierent from R2 and R4 (P< 0.05). Consistently metabolisable energy of R1 and R3 also significant from R2 and R4. Glucose metabolism in Etawah crossbred goat receiving R3 treatment was the best for glucose plasma concentration, glucose p001, distribution space and glucose flux. Milk production in R3 was 1544 ml/d, significantly difierent from R1 (1072 ml/d), R2 (700 ml/d) and R4 (570 ml/d). There was a strong supporting that glucose kinetic afiected to the milk production