Optimization of dry period in Karan Fries cow
| Autor: | K. Puhle Japheth, R. K. Mehla, Mahendra Singh, A. K. Gupta, Ramendra Das, Pranay Bharti, T. Chandrasekar |
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| Jazyk: | angličtina |
| Rok vydání: | 2016 |
| Předmět: | |
| Zdroj: | Veterinary World, Vol 9, Iss 6, Pp 648-652 (2016) |
| Druh dokumentu: | article |
| ISSN: | 0972-8988 2231-0916 |
| DOI: | 10.14202/vetworld.2016.648-652 |
| Popis: | Aim: The objective of this study was to optimize dry period (DP) length that can maximize the production across adjacent lactations and overall lifetime yield. Materials and Methods: Performance records with respect to DP spread over a period of 15-year in Karan Fries (KF) cattle maintained at Livestock Research Centre (National Dairy Research Institute), were collected for the study. Data of 681 KF cows were analyzed by least square technique to examine the effect of non-genetic factors on DP. Season of calving was classified into four seasons: Winter season (December-March), summer season (April-June), rainy season (July-September), and autumn season (October-November); period of calving into five periods: 1998-2000 (1-period), 2001-2003 (II-period), 2004-2006 (III-period), 2007-2009 (IV-period), and 2010-2012 (V-period), and parity into six parities, i.e., 1st, 2nd, 3rd, 4th, 5th, and ˃6th parities to see the effect of non-genetic factors on DP. Results: Period of calving, season of calving, and parity did not affect the DP significantly (p |
| Databáze: | Directory of Open Access Journals |
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