Abstract
Studies of physiological bovine somatotropin (bST) on post lactating dairy ABSTRACT. To increase of milk production nationally with used in dairy cattle business can assist to increase milk production, eighteen post lactating dairy cows in the highland Cipelang Bogor, were used to study the effect used of bovine somatotropin and lactating time. The experimental cows were assigned into a Randomized Block Design with a 3x2 factorial arrangement. The first factor was using of somatotropin (bST)with three levels (non bST injection, biweekly injection and three weekly injection). The second factor was lactating time with two levels (4th lactating time and 6 th lactating time) Parameters measured were heart rate, respiration frequency, rectal temperature, milk production efficiency, milk production, 4% FCM (fat corrected milk.), Milk composition, weigh gain, milk quality consist of protein, fat, pH. Bovine somatotropin significantly increased heart rate and respiration rate. Also bovine somatotropin injection at 4th lactating time significantly increased milk production. There were an interaction between bST dan lactating time on milk production and weight gain. Bovine somatotropin injection biweekly in cows on 4th lactating time ration increased milk production by 16-26 %, but injection in cows 6th lactating time increased milk production by 8-18 % combination with somatotropin doze 250/ml/14 days. Somatothropine supplementation was injection biweekly and three weekly did significantly affect to milk production, body temperature, heart rate, and respiration rate however in normal physiology . Bovine somatotropine can increase post lactating dairy production interval 14 days better than 21 days.
Highlights
study the effect used of bovine somatotropin
The experimental cows were assigned into a Randomized Block Design with a 3x2 factorial arrangement
The first factor was using of somatotropin
Summary
Tempat dan Waktu Penelitian ini dilakukan di perusahaan petemakan sapi perah Peternakan Rakyat, yang terletak di Cipelang Bogor dengan ketinggian tempat 400-500 meter di atas permukaan laut dengan suhu 23-30°C, dengan curah hujan 3500 mm pertahun dan kelembaban 60%. Ternak dibagi ke dalam tiga kelompok, Kelompok Kontrol (K), Kelompok yang disuntik bST setiap 2 minggu (KS 1) dan Kelompok yang disuntik setiap 3 minggu (KS2). Pemberian nomor secara acak sesuai dengan perlakuan yang diberikan. Penyuntikan plasebo (sesame oil) dilakukan kepada kelompok kontrol (6 ekor), pada kelompok (KS 1) dilakukan penyuntikan bST secara intramuskular dengan dosis dosis 250 mg per ekor per 14 hari (6 ekor), pada kelompok (KS2) dilakukan penyuntikan secara intramuskular dengan dosis 250 mg per ekor per 21 hari (6 ekor). Waktu penyuntikan dilakukan secara serentak pada pagi hari.Masing-masing kelompok terdiri sapi dengan masa laktasi yaitu masa laktasi ke dua, ke empat dan ke enam, bulan laktasi antara ke dua dan ke empat.
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