Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt
Records of 71 buffaloes, raised under a semi-intensive production system in a university herd, collected from 1993 to 1999, were used to study the effect of some nongenetic factors on milk performance and causes of calf mortality. The averages of the milk yield, lactation length, calving interval, d...
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| Format: | Article |
| Language: | English |
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CIRAD
2001-02-01
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| Series: | Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux |
| Subjects: | |
| Online Access: | http://revues.cirad.fr/index.php/REMVT/article/view/9792 |
| _version_ | 1827885722256801792 |
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| author | M. Mourad S. Rashwan |
| author_facet | M. Mourad S. Rashwan |
| author_sort | M. Mourad |
| collection | DOAJ |
| description | Records of 71 buffaloes, raised under a semi-intensive production system in a university herd, collected from 1993 to 1999, were used to study the effect of some nongenetic factors on milk performance and causes of calf mortality. The averages of the milk yield, lactation length, calving interval, daily milk yield and proportion of lactation length on the calving interval were 1626 kg, 305 days, 431 days, 7.4 kg and 0.714, respectively. The calving season (P < 0.05) and parity significantly (P < 0.001) affected the milk yield. The calving interval as the only reproductive trait was significantly (P < 0.001) affected by the calving season. The year of calving had no significant (P > 0.05) effect on the traits studied. The daily milk yield and proportion of lactation length in the calving interval were not significantly (P > 0.05) affected by the calving year, calving season and parity. The average persistency of the milk yield was 73%. Yearly calf mortality rates were 19, 33, 25.5, 25 and 12%, whereas those of buffaloes were 2.3, 2.3, 2.2, 6.6 and 2.1% during the five years of the veterinary study. Seasonal raw mortality rates of calves were high during the winter (53.6%), followed by spring and summer (17.3 and 12%). The complex “light body weight at birth-pneumonia-bad management” caused 71.4% of total calf mortality during the period of the study. The year of calving had a significant (P < 0.01) effect on the number of calves that died and that died by particular from pneumonia, and a highly significant (P < 0.001) effect on the light body weight at birth. |
| first_indexed | 2024-03-12T19:50:46Z |
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| id | doaj.art-229f50e3fa074b4e85e276c299a2a951 |
| institution | Directory Open Access Journal |
| issn | 0035-1865 1951-6711 |
| language | English |
| last_indexed | 2024-03-12T19:50:46Z |
| publishDate | 2001-02-01 |
| publisher | CIRAD |
| record_format | Article |
| series | Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux |
| spelling | doaj.art-229f50e3fa074b4e85e276c299a2a9512023-08-02T03:08:51ZengCIRADRevue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux0035-18651951-67112001-02-0154213914510.19182/remvt.97929792Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in EgyptM. Mourad0S. Rashwan1Department of Animal Production, Faculty of Agriculture, University of Ain-Shams, PO Box 11241, Hadayek Shoubra, Cairo, Egypt Fax: +202 444 44 60Department of Animal Production, Faculty of Agriculture, University of Ain-Shams, PO Box 11241, Hadayek Shoubra, Cairo, EgyptRecords of 71 buffaloes, raised under a semi-intensive production system in a university herd, collected from 1993 to 1999, were used to study the effect of some nongenetic factors on milk performance and causes of calf mortality. The averages of the milk yield, lactation length, calving interval, daily milk yield and proportion of lactation length on the calving interval were 1626 kg, 305 days, 431 days, 7.4 kg and 0.714, respectively. The calving season (P < 0.05) and parity significantly (P < 0.001) affected the milk yield. The calving interval as the only reproductive trait was significantly (P < 0.001) affected by the calving season. The year of calving had no significant (P > 0.05) effect on the traits studied. The daily milk yield and proportion of lactation length in the calving interval were not significantly (P > 0.05) affected by the calving year, calving season and parity. The average persistency of the milk yield was 73%. Yearly calf mortality rates were 19, 33, 25.5, 25 and 12%, whereas those of buffaloes were 2.3, 2.3, 2.2, 6.6 and 2.1% during the five years of the veterinary study. Seasonal raw mortality rates of calves were high during the winter (53.6%), followed by spring and summer (17.3 and 12%). The complex “light body weight at birth-pneumonia-bad management” caused 71.4% of total calf mortality during the period of the study. The year of calving had a significant (P < 0.01) effect on the number of calves that died and that died by particular from pneumonia, and a highly significant (P < 0.001) effect on the light body weight at birth.http://revues.cirad.fr/index.php/REMVT/article/view/9792BovinaeLait de bufflesseFacteur de rendementVeauMortalitéEgypte |
| spellingShingle | M. Mourad S. Rashwan Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt Revue d’Elevage et de Médecine Vétérinaire des Pays Tropicaux Bovinae Lait de bufflesse Facteur de rendement Veau Mortalité Egypte |
| title | Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt |
| title_full | Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt |
| title_fullStr | Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt |
| title_full_unstemmed | Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt |
| title_short | Milk Production of Buffaloes and Causes of Calf Mortality under a Semi-Intensive Production System in Egypt |
| title_sort | milk production of buffaloes and causes of calf mortality under a semi intensive production system in egypt |
| topic | Bovinae Lait de bufflesse Facteur de rendement Veau Mortalité Egypte |
| url | http://revues.cirad.fr/index.php/REMVT/article/view/9792 |
| work_keys_str_mv | AT mmourad milkproductionofbuffaloesandcausesofcalfmortalityunderasemiintensiveproductionsysteminegypt AT srashwan milkproductionofbuffaloesandcausesofcalfmortalityunderasemiintensiveproductionsysteminegypt |