PRODUCTIVE AND HEMATOLOGICAL RESPONSES DUE TO INJECTION OF LONG ACTING SOMATOTROPIN IN FRIESIAN COWS. | ||
| Journal of Animal and Poultry Production | ||
| Article 4, Volume 29, Issue 5, May 2004, Pages 2273-2284 PDF (677.69 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/jappmu.2004.239159 | ||
| Authors | ||
| Enas R. EI-Sedfy,1; Y. M. Hafez2; S. A. Ibrahim2; Nagwa A. Bassiouni1 | ||
| 1Animal Production Department, Faculty of Agriculture, Cairo University, Giza, Egypt. | ||
| 2Animal Production Research Institute, Dokkl, Giza, Egypt | ||
| Abstract | ||
| . Fourteen lactating Friesian cows were used. 7 cows as control injected subcutaneously with saline (0.9% Nac!) and the rest were injected subcutaneously with 500 mg rbST (Somatech®) at injection intervals of 14 days. Blood and milk samples were taken every two weeks for analysis. Milk constituents such as fat. total protein. lactose, total solids, solids not fat and somatic cell count were determined. Fresh blood used for the determination of hemoglobin (Hb) and hematocrit (HT). Blood constituents (total protein, albumin, globulin, total lipids, triglycerides and glucose were determined in plasma colorimetrically. Results are summarized as follow: Injection of rbST causes insignificant increase In both Ht (%) and Hb (g/dl) of the whole blood by 2.6% and 1.4%, respectively over the control. Hb concentration was higher in injected cows' plasma blood at 3rd, 4th, 7th and 10th injections. Concentrations of plasma tolal protein (g/dl), globulin, triglycerides (mg/dl) and the ratio between albumin and globulin were significantly (P<0.05) higher by 5.9 %, 13.1 %, 11.1 % and 3.8 %, respectively, while plasma albumin was lower in blood of rbST injected cows by 0.7%, than the control cows. Meanwhile, concentraticn of plasma total lipids (gIL) was slightly higher in blood of rbST injected cows than control bv..0.5%. Total protein concentration was higher in treated cows at 1st, 2nd, 3rd, 5th. 6th and 7th injections. Milk yield at 305 days was higher (P<0.05) in rbST treated cows than control by 20.6%. Injection of rbST in Friesian cows had significantly higher milk protein than control by 2.4%, it was significantly higher at 1 st, znc, 3rd, 4th, 5th, 7th, 8th, 9th and 10th injections. Cows injected with rbST were inSignificantly higher in milk fat and total solids, but lower in milk lactose than control cows by 11.1 %, 9.4 % and 0.2%, respectively. Changes in milk somatic cell count revealed that control cows had lower (P<0.05) counts than rbST treated cows by 30.6 %. | ||
| Keywords | ||
| rbST; Friesian cows; blood; milk; somatic cell count | ||
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