Milk Production of Young Holstein Cows Fed only on Grass from Steep, Intensively Managed Tropical Grass Pastures over Three Successive Lactations

Título en español.

dc.creator
dc.creator
dc.date1974-01-01
dc.date.accessioned2022-11-04T15:33:03Z
dc.date.available2022-11-04T15:33:03Z
dc.identifierhttps://revistas.upr.edu/index.php/jaupr/article/view/10695
dc.identifier10.46429/jaupr.v58i1.10695
dc.identifier.urihttps://repositorioslatinoamericanos.uchile.cl/handle/2250/5124130
dc.descriptionMilk produced during their first three lactations by nine Hoisteins fed exclusively on all-grass rations from steep tropical grass pastures in the humid mountain region of Puerto Rico was determined. The pastures, which received 1 ton of 15-5-10 per acre yearly, carried one cow per acre with no supplementary feed. Grass consumed by the grazing cows contained from 16.5 to 20.2 percent of protein depending on the season of the year. The cows produced an average of 4,497, 8,132, and 8,573 pounds of milk during their first, second and third lactations, respectively. The lactations averaged 263, 290, and 280 days in length, respectively, with an average calving interval of 12.3 months. The cows weighed an average of 929 pounds at first calving, increasing to 1,148 pounds at the third calving. An economic model based on these results shows that feeding cows on all-grass rations from intensively managed steep pastures can be highly profitable in the mountain region of Puerto Rico where the land has few alternative uses.en-US
dc.descriptionSe determinó la producción de leche en tres lactancias sucesivas de nueve vacas Holstein alimentadas exclusivamente con yerba, en pastos con declive en la región montañosa húmeda de Puerto Rico. Los pastos, que se abonaron con 1 tonelada de la fórmula 15-5-10 por acre al año, mantuvieron una vaca por acre sin alimento suplementario alguno. El forraje ingerido por las vacas al pastar contenía de 16.5 a 20.2 por ciento de proteína, dependiendo de la época del año. Las vacas produjeron un promedio de 4,497, 8,132 y 8,573 libras de leche durante su primera, segunda y tercera lactancias, respectivamente. Las lactancias duraron un promedio de 263, 290 y 280 días, respectivamente, con un intervalo promedio de 12.3 meses entre partos. Las vacas pesaron un promedio de 929 libras al parir por primera vez, aumentando a 1,148 libras en el tercer parto. Un modelo económico basado en estos resultados demuestra que la alimentación de vacas exclusivamente con pastos cultivados intensivamente en la región montañosa de Puerto Rico puede ser muy gananciosa.es-ES
dc.formatapplication/pdf
dc.languageeng
dc.publisherUniversity of Puerto Rico Mayagüez Campus Agricultural Experiment Stationen-US
dc.relationhttps://revistas.upr.edu/index.php/jaupr/article/view/10695/9019
dc.rightsDerechos de autor 2017 Journal of Agriculture of the University of Puerto Rico. (Etapa III)es-ES
dc.sourceThe Journal of Agriculture of the University of Puerto Rico; Vol. 58 No. 1 (1974): Vol. 58, No. 1, January 1974; 18-25en-US
dc.sourceJournal of Agriculture of the University of Puerto Rico; Vol. 58 Núm. 1 (1974): Vol. 58, No. 1, January 1974; 18-25es-ES
dc.source2308-1759
dc.source0041-994X
dc.source10.46429/jaupr.v58i1
dc.subjectDairy cattle--Puerto Ricoen-US
dc.subjectDairying--Tropicsen-US
dc.subjectHolstein-Fresian cattle--Puerto Ricoen-US
dc.subjectDairy cattle--feeding and feeds--Puerto Ricoen-US
dc.subjectDairying--Puerto Ricoen-US
dc.titleMilk Production of Young Holstein Cows Fed only on Grass from Steep, Intensively Managed Tropical Grass Pastures over Three Successive Lactationsen-US
dc.titleTítulo en español.es-ES
dc.typeinfo:eu-repo/semantics/article
dc.typeinfo:eu-repo/semantics/publishedVersion


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