Salman LB, Djaja W, Anang A, Indrijani H, Partasasmita R. 2017. Birth weight of a Holstein calf based on forefoot circumference. Nusantara Bioscience 9: 367-370. Record of birth weight of Holstein calf can be used as consideration for selection. The purpose of this study is to determine the accuracy of birth weight based on regular measuring tape compared to Calf scale BW Tape. The records of calf’s birth weight were collected from 1370 female calf birth records from PT Taurus Dairy Farm, Sukabumi. Birth weight measurements were performed by (i) measuring birth weight using Calf scale BW Tape (Nasco, Fort Atkinson, WI); (ii) predicting birth weight with regression based on the circumference of the right front toenails using regular measuring tape a day after the calf was born; (iii) weighing the calf with the scales. The results showed that the predicted birth weight of dairy cow’s calves can be done by regular measuring tape with a polynomial regression equation, Y=(-6288,6)+(1378.8X)-(113.0X2)+(4.1X3)-(0.056X4), which has a deviation 0.5%, and 7.4% using Calfscale BW Tape. Conclusion of this research is that predicting birth weight of dairy cow’s calves using regular measuring tape is more accurate than using Calfscale BW Tape
The aim of the research was to investigate the effect of feeding dried Caliandra leaves on milk production. The research was conducted at Harapan Jaya dairy cattle group, Sumedang. The treatments were R1 (grass+100% concentrate), R2 (grass+90% concentrate+10% dried Caliandra leaf), R3 (grass+80% concentrate+20% dried Caliandra leaf), and R4 (grass+70% concentrate+30% dried Caliandra leaf). Sixteen Fries Holland dairy cattle were used and were divided into four groups. The experimental design used was a randomized block design and the mean of treatments was tested using orthogonal contrast. The results showed that feeding dried Caliandra (C. calothyrsus) leaves were able to substitute concentrate as it increased milk production by 4 %. However, feeding dried Caliandra leaves did not affect the milk components of Fries Hollands dairy cattle as described below. 1) There was not a significant difference among the treatments; however, there was a 4% increase on FCM milk production of Fries Holland cattle (R3). There was not a different on milk components which was based on milk fat production, dry matter production, solid non fat, and lactose production. The results suggested that 20% substitution of the concentrate using dried Caliandra leaves for feeding the lactating cows was the best method to increase the milk production as well as economical.Key Words: milk production, milk components, dried Caliandra leaves, Fries Holland. ABSTRAKPenelitian dilaksanakan di kelompok peternak sapi perah Harapan Jaya, kabupaten Sumedang,dengan tujuan untuk mengetahui pengaruh jumlah pemberian daun kering Kaliandra yang menyubstitusi konsentrat terhadap produksi susu sapi perah Fries Holland. Percobaan menggunakan 16 ekor sapi Fries Hollands(FH) dan dibagi menjadi empat kelompok. Perlakuan terdiri dari R1 (jerami+100% konsentrat), R2 (rumput+90% konsentrat+10% daun kering Kaliandra), R3 (rumput+80% konsentrat+20% daun kering Kaliandra), dan R4 (rumput+70% konsentrat+30% daun kering Kaliandra). Rancangan percobaan yang digunakan yaitu rancangan acak kelompok dan pengujian dilanjutkan dengan uji kontras ortogonal. Perlakuan meningkatkan jumlah produksi 4% FCM susu sapi perah Fries Holland tetapi di antara perlakuan Kaliandra sendiri berpengaruh tidak nyata. Perlakuan R3 memberi hasil susu lebih banya k dibandingkan dengan R1,R2 dan R4. 2) Perlakuan tidak secara nyata (P>0,05) meningkatkan jumlah produksi komponen susu berdasarkan c) Jumlah produksi bahan kering tanpa lemak susu perlakuan R3 lebih bbanyak dibanding R1,R2 dan R4. d) Jumlah produksi protein susu perlakuan R3 lebih banyak dari pada R1;R2 dan R4. e) Jumlah produksi laktosa perlakuan R1, R2, R3, dan R4 masing-masing sebesar 0,454±0,136; 0,551±0,110; 0,558±0,089; dan 0,515±0,101 kg/ekor/hari. Berdasarkan hasil penelitian maka disarankan bahwa untuk penerapan di lapangan agar produksi susu meningkat dan memberi manfaat ekonomi sebaiknya digunakan daun kering Kaliandra sebanyak 20% sebagai pengganti konsentrat.Kata kunci: FCM susu, sapi perah, bahan kering, laktosa s...
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