Consumption and Digestibility of Nutrients in Bali Cattle at the Last Period of Pregnancy Kept under Semi Intensive System Supplemented with Nutritive Rich Feed Contained Lemuru Oil and Zinc

Abstract

An experiment was conducted for three months to examine the addition of nutritive rich feed (NRF) containing “lemuru“ oil and zinc on consumption and digestion of dry matter, organic matter, crude ber dan crude protein of cows of Bali cattle during late gestation period and kept under semi intensive system. Formulation of NRF consisted of palm (borasus) oil, leucaena leaves and gliricidia leaves meal, fermented rice bran, sh meal, “lemuru“ oil, ZnSO4, urea, and salt. The crude protein content of NRF was 23 %, while total digestible nutrient was 70 %. A total of 12 heads of last pregnancy period of Bali cattle with initial body weight of 241.90 ± 23.25 kg (coef cient variance = 9.61) were employed in this experiment. Experimental design used was completely randomized design consisted of three treatments and four replications. The treatments were: T0 = cows consumed hay and standing hay as basal diet in pasture; T1 = T0 + bidara (Zizipus) leaves as feed addition; and T2 = T1 + NRF formulae contained lemuru oil 1.5% + 150 mg ZnSO4/ kg (Table 1). NRF was given in the morning while bidara leaves in the noon. NRF was given 30% of dry matter requirement and dry matter requirement was 3% of body weight. All parameters measured in this experiment were both nutrients consumption and digestibility based on method described by Ranjhan (1988). Data were analyzed by analysis of variance and testing by Duncan’s new multiple range tests.The results of this research indicated that there were highly signi cant change in dry matter, organic matter, crude ber, and protein intake (P<0.01). Dry matter, organic matter, and crude protein digestibility were also highly signi cant differences (p<0.01), but crude ber digestibility was signi cant (P<0.05) on supplementation of NRF containing 1.5 % “lemuru “oil and zinc level of 150 mg/ kg of dry matter of NRF. It was concluded that supplementation of NRF with 1.5% of lemuru oil and 150 mg of ZnSO4/kg dry matter of NRF could increased intake and digestibility of dry matter, organic matter, crude ber and crude protein of the last pregnancy period of Bali cows kept under semi intensive system during the dry season.