Limitations and potentials of dual-purpose cow herds in Central Coastal Veracruz, Mexico

被引:11
作者
Absalon-Medina, Victor Antonio [3 ]
Blake, Robert W. [1 ,2 ,3 ]
Fox, Danny Gene [3 ]
Juarez-Lagunes, Francisco I. [4 ]
Nicholson, Charles F. [5 ]
Canudas-Lara, Eduardo G. [4 ]
Rueda-Maldonado, Bertha L. [6 ]
机构
[1] Michigan State Univ, Dept Anim Sci, E Lansing, MI 48824 USA
[2] Michigan State Univ, Ctr Latin Amer & Caribbean Studies, E Lansing, MI 48824 USA
[3] Cornell Univ, Dept Anim Sci, Ithaca, NY 14853 USA
[4] Univ Veracruzana, Fac Med Vet & Zootecnia, Veracruz 91710, Veracruz, Mexico
[5] Calif Polytech State Univ San Luis Obispo, Dept Agribusiness, San Luis Obispo, CA 93407 USA
[6] Inst Nacl Invest Forestales Agr & Pecuarias, Paso Del Toro 94277, Veracruz, Mexico
关键词
Modeling; Tropics; Herd vulnerability; Alternative management; CORNELL NET CARBOHYDRATE; PROTEIN SYSTEM; ENERGY-BALANCE; MODEL;
D O I
10.1007/s11250-011-0049-1
中图分类号
S8 [畜牧、 动物医学、狩猎、蚕、蜂];
学科分类号
0905 ;
摘要
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.
引用
收藏
页码:1131 / 1142
页数:12
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