Adaptability in crossbred dairy cows under the subtropical environmental conditions of the Punjab. | [Pakistan Veterinary Journal • 1988]

Author(s):

1. M. Zamman Chaudhry: Livestock Production Research Institute of Bahadurnagar, Okara, Pakistan

2. Iftikhar Haider Shah: Livestock Production Research Institute of Bahadurnagar, Okara, Pakistan

3. S. M. Feroze Shah: Livestock Production Research Institute of Bahadurnagar, Okara, Pakistan

4. S. Karam Shah: Animal Science Institute, National Agricultural Research Centre (NARC), Islamabad, Pakistan

Abstract:

The adaptability study was conducted at Live-stock Production Research Institute, Bahadurnagar, on 5 cows each of Fi Holstein Friesian (HF) X Sahiwal (HF X S), F Jersy X Sahiwal (JXS) and Sahiwal (S) for physiological responses and milk yield. All the cows were in their early first lactation. The HF X S crossbreds had significantly higher rectal temperature and respiration rate than J X S and S cows. The HF X S produced significantly higher milk than J X S and inspite of the climatic stress. The milk yield was significantly higher in the morning than in the afternoon. The rectal temperature and respiration rate were significantly higher in the afternoon. The milk yield and pulse rate were significantly higher during May, while the rectal temperature was significantly higher from 16th June to 30th June. The respiration rate did not differ amongst periods. The correlation coefficients of rectal temperature with ambient temperature were positive and significant in all the three genetic groups. For respiration rate, pulse rate and milk yield these were positive in all the three breeds but significant for HF X S only. The correlation coefficient of rectal temperature and respiration rate with relative humidity were negative and significant for pulse rate and milk yield for all the genetic groups.

Page(s): 33-41

DOI: DOI not available

Published: Journal: Pakistan Veterinary Journal, Volume: 8, Issue: 1, Year: 1988

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