CHARACTERIZATION OF SOME PRODUCTIVE AND REPRODUCTIVE TRAITS OF SYRIAN SHAMI AND HOLSTEIN COWS UNDER SYRIAN CONDITIONS
| Autor: | Mohamed Abd El Aziz Ibrahim, S. Abou-Bakr, Obaida Abdel Kareem Almasri |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
010504 meteorology & atmospheric sciences
0402 animal and dairy science Ice calving 04 agricultural and veterinary sciences Biology 040201 dairy & animal science 01 natural sciences Breed Animal science Milk yield medicine.anatomical_structure Lactation Calving interval medicine Christian ministry 0105 earth and related environmental sciences |
| Zdroj: | Egyptian Journal of Animal Production. 58:21-28 |
| ISSN: | 2735-3028 |
| Popis: | The objective of this study was conducted to evaluate the productive and reproductive performances of Shami and Holstein cows under Syrian condition. In this study, 2654 and 4289 records were collected on 569 Shami and 1669 Holstein cows during the period from 1978 to 2015 of two experimental stations, Ministry of Agriculture and Land Reclamation, Syria. Data were analyzed using the General Liner Model (XLSTATE. 2020). Age at first calving (AFC), calving interval (CI), total milk yield (TMY), daily milk yield (DMY) and lactation period (LP) were significantly affected (p < 0.01) by two breed. The least squares means for AFC, CI, TMY, DMY and LP were 31±0.14 months, 442±2.83 days, 1587±34.89 kg, 9.1±0.09 kg and 165±2.0 days in Shami breed, respectively, compared to 28.1±0.10 months, 432±3.34 days, 5494±41.21 kg, 16.7±0.11 kg and 332±2.36 days in Holstein breed, respectively, under Syrian condition. The present study revealed that Shami cows performed less in all studied traits compared to the Holstein cows under Syrian condition. Improve management conditions and genetic improvement for Shami cows could be improve their productive and reproductive performance. |
| Databáze: | OpenAIRE |
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