Reproductive performance of dairy cows in Yogyakarta province based on balanced ration given

Abstract

The research was done to investigate reproductive performance of dairy cows in Yogyakarta Province based on balanced ration given. Five farmer groups for each cooperative from sixty two farmer groups of three milk cooperatives, namely UPP-Kaliurang, Sarono Makmur and Warga Mulya were randomly pointed as respondents. Selected fifteen farmer groups (15 groups), by simply random were taken 120 farmers as respondents and 132 cow as a sample. For each farmer at least raised dairy cow and had reached second lactation. The research methods were field survey, interview, questionnaire, observation and laboratory analysis to gather both premiery and secondary data. Parameter measurements were calving interval, postpartum mating (PPM), service per conception (S/C), weaning time and consumption of dry matter (DM), crude protein (CP) and total digestible nutrient (TDN). Data were analyzed using multiple regression and description. The result showed that the average calving interval of dairy cow in Yogyakarta Province was 434.77±59.20 days. The result of regression analysis demonstrated that postpartum mating and service per conception had highly significant effect (P<0.01) toward calving interval, by regression line of Y =2230.826 + 28.892 X1 + 33.587 X2 + 3.812 X3, with determinant coefficient (R ) as much as 0.687. The average of postpartum mating was 4.21±1.20 months, while service per conception 1.98±0.91 times and weaning time was 4.08±1.07 months. Balanced ration given for lactation dairy cows still deficient on DM 1,54 kg and CP 44,89 g. While during the dry period the deficient was 2,06 kg DM, 243,91 g CP and 1,35 kg TDN. It’s can be concluded that calving interval in Yogyakarta Province was 434.77±59.20 days, postpartum mating 4.21±1.20 months, service per conception 1.98±0.91 times, weaning time 4.08±1.07 months respectively. While the balanced ration given has not yet satisfied the needs of dairy cows on protein in Yogyakarta by fulfilling limited energy, especially in the last two-month of pregnant when they lost a large quantity of energy and protein. The balanced ration given sufficinly only to dairy cow which has average milk average milk production of 6 liters per day.