| Limitations and potentials of dual-purpose cow herds in Central Coastal Veracruz, Mexico. | |
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MedLine Citation:
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PMID: 22201012 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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Feed chemical and kinetic composition and animal performance information was used to evaluate productivity limitations and potentials of dual-purpose member herds of the Genesis farmer organization of central coastal Veracruz, Mexico. The Cornell Net Carbohydrate and Protein System model (Version 6.0) was systematically applied to specific groups of cows in structured simulations to establish probable input-output relationships for typical management, and to estimate probable outcomes from alternative management based on forage-based dietary improvements. Key herd vulnerabilities were pinpointed: chronic energy deficits among dry cows of all ages in late gestation and impeded growth for immature cows. Regardless of the forage season of calving, most cows, if not all, incur energy deficits in the final trimester of gestation; thus reducing the pool of tissue energy and constraining milking performance. Under typical management, cows are smaller and underweight for their age, which limits feed intake capacity, milk production and the probability of early postpartum return to ovarian cyclicity. The substitution of good-quality harvested forage for grazing increased predicted yields by about one-third over typical scenarios for underweight cows. When diets from first parturition properly supported growth and tissue repletion, milk production in second and third lactations was predicted to improve about 60%. Judiciously supplemented diets based on good quality grass and legume forages from first calving were predicted to further increase productivity by about 80% across a three-lactation cow lifetime. These dual-purpose herd owners have large incentives to increase sales income by implementing nutritional strategies like those considered in this study. |
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Authors:
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Victor Antonio Absalón-Medina; Robert W Blake; Danny Gene Fox; Francisco I Juárez-Lagunes; Charles F Nicholson; Eduardo G Canudas-Lara; Bertha L Rueda-Maldonado |
Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-12-27 |
Journal Detail:
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Title: Tropical animal health and production Volume: - ISSN: 1573-7438 ISO Abbreviation: - Publication Date: 2011 Dec |
Date Detail:
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Created Date: 2011-12-27 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 1277355 Medline TA: Trop Anim Health Prod Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Department of Animal Science, Cornell University, Ithaca, NY, 14853, USA. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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