Hubungan Masa Kosong dengan Produktivitas pada Sapi Perah Friesian Holstein di Baturraden, Indonesia

Abstract

Productivity of dairy cows not only expresed by milk yield, but also the reproductive perfor-mance. General speaking that the milk yield depends on reproductive performance and vice versa. The present study was conducted to observe the milk yield and reproductive performance of Friesian Holstein (FH) dairy cows. This study was conducted using 150 sets of weekly recording of milk yield from 50 FH cows. Milk yield was calculated by using time interval method (TIM) which was equiva-lent to ME 305 days. The data were analysed using polynomial regression model. Results of the study indicated that the effect of days open on milk yield had significant effect on quadratic and qubic re-gression model. The average days open was 138.77 days. According to the quadratic regression model, increasing days open decreased milk yield and the minimum milk yield was observed at 169 days open.

Masa kosong (days open) merupakan salah satu faktor penentu produksi susu. Penelitian ini bertujuan untuk mengkaji pengaruh masa kosong terhadap produksi susu setara dewasa (SD) 305 hari. Materi penelitian berupa 150 catatan mingguan produksi susu dari 50 ekor sapi Friesian Holstein (FH) di Balai Besar Pembibitan Ternak Unggul (BBPTU) Sapi Perah Baturraden, Purwokerto, Jawa Tengah. Produksi susu dihitung dengan menggunakan time interval method (TIM) kemudian disetarakan dewasa 305 hari. Data dianalisis menggunakan model regresi polinomial. Pengaruh masa kosong terhadap produksi susu sangat nyata pada bentuk kuadratik dan kubik. Sapi memiliki masa kosong 138,77 hari. Berdasarkan persamaan model regresi kuadratik, peningkatan masa kosong akan menyebabkan penurunan produksi susu dan mencapai titik minimum pada masa kosong 169 hari.