Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition.
Three experiments (two in the dry season and one in the rainy season) were conducted utilizing 96 Simmental x Zebu calves, with the aim to evaluate the effect of preconditioning during 112 d starting at d 28 preweaning. In four periods of 28 d each, body weight and body condition score of the animals, blood urea nitrogen (BUN) and glucose (SG) in serum, as well as disease frequency in grazing calves were evaluated. Data of BW, cumulative body weight gain (BWG) BUN, and SG were analyzed with ANOVA in a 2 treatments x 2 sex factorial arrangement; morbility was analyzed by Ji square. BW (P=0.552) and BCS (P=0.891) of nursing cows did not vary due to treatments. Interaction conditioning x sex was not significant (P=0.853), and sex did not influenced growth of calves (mean=357 g/d). Conditioning led to better BWG (507 vs 281 g/d; P=0.001) in the dry season and less morbility (P=0.001) than the control group. During the rainy season preconditioning increased 31 % the cumulative BWG in 112 d compared to control (370 vs 281 g/d; P=0.026). Concentrations of BUN (P=0.425) and SG (P=0.270) were similar between treatments. In conclusion, preconditioning of calves improved BWG postweaning, reduced morbility and loss of weight and BCS of lactating cows during the dry season.
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Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias
2017
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rev-remexcp-article46432018-05-15T19:03:36Z Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. Acondicionamiento de becerros previo a la recría bajo pastoreo en trópico seco: efectos sobre el peso corporal y la condición sanitaria Guarneros Altamirano, Rafael Gutiérrez Ornelas, Erasmo Bernal Barragán, Hugo Avalos Ramírez, Ramiro Castillo Gallegos, Epigmenio Olivares Sáenz, Emilio Pre-weaning; Conditioning of calves; Body weight gain; Dry tropics. Acondicionamiento de becerros; Ganancia de peso; Trópico seco; Pastoreo. Three experiments (two in the dry season and one in the rainy season) were conducted utilizing 96 Simmental x Zebu calves, with the aim to evaluate the effect of preconditioning during 112 d starting at d 28 preweaning. In four periods of 28 d each, body weight and body condition score of the animals, blood urea nitrogen (BUN) and glucose (SG) in serum, as well as disease frequency in grazing calves were evaluated. Data of BW, cumulative body weight gain (BWG) BUN, and SG were analyzed with ANOVA in a 2 treatments x 2 sex factorial arrangement; morbility was analyzed by Ji square. BW (P=0.552) and BCS (P=0.891) of nursing cows did not vary due to treatments. Interaction conditioning x sex was not significant (P=0.853), and sex did not influenced growth of calves (mean=357 g/d). Conditioning led to better BWG (507 vs 281 g/d; P=0.001) in the dry season and less morbility (P=0.001) than the control group. During the rainy season preconditioning increased 31 % the cumulative BWG in 112 d compared to control (370 vs 281 g/d; P=0.026). Concentrations of BUN (P=0.425) and SG (P=0.270) were similar between treatments. In conclusion, preconditioning of calves improved BWG postweaning, reduced morbility and loss of weight and BCS of lactating cows during the dry season. Se realizaron tres experimentos (2 en época seca y 1 en época de lluvias) utilizando 96 becerros (Simmental X Cebú) para evaluar el efecto del acondicionamiento realizado durante 112 días (del día 28 predestete al día 84 posdestete). En cuatro períodos de 28 días cada uno, se evaluó peso y condición corporal de los animales, nitrógeno ureico (NU) y glucosa (GS) en suero sanguíneo, así como la incidencia de enfermedades (IE) de becerros en pastoreo. Resultados de peso corporal, ganancia de peso (GDP) acumulativa, NU y GS se evaluaron con ANOVA en un diseño factorial de 2 tratamientos x 2 sexos; IE se analizó con Ji-cuadrada. No hubo diferencia de peso (P=0.552) ni de CC (P=0.891) de las vacas debido a tratamientos. No hubo interacción acondicionamiento x sexo (P= 0.853) ni efecto de sexo (P=0.586) sobre el crecimiento de becerros (media=357 g/día). El acondicionamiento originó mejor GDP (507 vs 281 g/día; P=0.001) en la época seca y menor IE (P=0.001) que el tratamiento testigo. En época de lluvias el acondicionamiento incrementó 31 % el crecimiento en 112 días respecto al testigo (370 vs 281 g/día; P=0.026). Las concentraciones de NU (P=0.425) y GS (P=0.270) fueron similares entre tratamientos. En conclusión, el acondicionamiento de becerros mejoró la GDP posdestete, redujo la incidencia de enfermedades en becerros, y la disminución de peso y condición corporal en sus madres, durante la época seca. Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias 2017-09-30 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html application/xml https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/4643 10.22319/rmcp.v8i4.4643 Revista Mexicana de Ciencias Pecuarias; Vol. 8, Núm. 4 (2017): Octubre-Diciembre; 341-351 Revista Mexicana de Ciencias Pecuarias; Vol. 8, Núm. 4 (2017): Octubre-Diciembre; 341-351 2448-6698 2007-1124 spa https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/4643/3769 https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/4643/3807 https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/4643/3899 http://creativecommons.org/licenses/by-nc-sa/4.0 |
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Guarneros Altamirano, Rafael Gutiérrez Ornelas, Erasmo Bernal Barragán, Hugo Avalos Ramírez, Ramiro Castillo Gallegos, Epigmenio Olivares Sáenz, Emilio |
| spellingShingle |
Guarneros Altamirano, Rafael Gutiérrez Ornelas, Erasmo Bernal Barragán, Hugo Avalos Ramírez, Ramiro Castillo Gallegos, Epigmenio Olivares Sáenz, Emilio Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| author_facet |
Guarneros Altamirano, Rafael Gutiérrez Ornelas, Erasmo Bernal Barragán, Hugo Avalos Ramírez, Ramiro Castillo Gallegos, Epigmenio Olivares Sáenz, Emilio |
| author_sort |
Guarneros Altamirano, Rafael |
| title |
Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| title_short |
Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| title_full |
Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| title_fullStr |
Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| title_full_unstemmed |
Conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| title_sort |
conditioning around weaning of calves grazing in the dry tropic: effects upon body weight and health condition. |
| description |
Three experiments (two in the dry season and one in the rainy season) were conducted utilizing 96 Simmental x Zebu calves, with the aim to evaluate the effect of preconditioning during 112 d starting at d 28 preweaning. In four periods of 28 d each, body weight and body condition score of the animals, blood urea nitrogen (BUN) and glucose (SG) in serum, as well as disease frequency in grazing calves were evaluated. Data of BW, cumulative body weight gain (BWG) BUN, and SG were analyzed with ANOVA in a 2 treatments x 2 sex factorial arrangement; morbility was analyzed by Ji square. BW (P=0.552) and BCS (P=0.891) of nursing cows did not vary due to treatments. Interaction conditioning x sex was not significant (P=0.853), and sex did not influenced growth of calves (mean=357 g/d). Conditioning led to better BWG (507 vs 281 g/d; P=0.001) in the dry season and less morbility (P=0.001) than the control group. During the rainy season preconditioning increased 31 % the cumulative BWG in 112 d compared to control (370 vs 281 g/d; P=0.026). Concentrations of BUN (P=0.425) and SG (P=0.270) were similar between treatments. In conclusion, preconditioning of calves improved BWG postweaning, reduced morbility and loss of weight and BCS of lactating cows during the dry season. |
| publisher |
Instituto Nacional de Investigaciones Forestales, Agrícolas y Pecuarias |
| publishDate |
2017 |
| url |
https://cienciaspecuarias.inifap.gob.mx/index.php/Pecuarias/article/view/4643 |
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