Performance of Bali Cows During Pregnancy Kept by Small Holder Partner of PT. Perkebunan Nusantara V Riau

The research was conducted to investigate performance of Bali Cows during pregnancy kept by smallholders partner of PT. Perkebunan Nusantara V in Dayu District, Siak Regency, Riau Province. 16 Bali Cows observed since pregnancy until birth. Data observed that the weight of each month before pregnancy until after birth, the change of weight at 1st trimester, 2nd trimester, 3rd trimester; birth of weight and sex of calf and maintenance management by farmer. Average daily gain (ADG) data was analyzed using analysis of covariance with initial weight as a covariate. The data weight of calf as analyzed with ANOVA. The data of maintenance management was analyzed using descriptive, quantitative, qualitative method. Average body’s weight at 1st trimester, 2nd trimester, 3rd trimester in consecutive were 218,4521,99 kg; 250,1121,40 kg; and 276,8422,42 kg. ADG at 1st trimester, 2nd trimester, 3rd trimester in consecutive were 0,260,19 kg/head/day; 0,140,16 kg/head/day; and 0,300,20 kg/head/day. The variation of male calf birth weight between 13 kg until 17 kg with an average 14,921,50 kg while the female calf between 13 kg until 16 kg with an average 14,500,94 kg. The percentage of male calf birth weight to the weight of cow is 5,05% and female calf 5,32 %. The result showed that there are change of Bali Cow body’s weight since pregnancy until birth increased but not significan