Effect of feeding strategies on weaning weight and milk production of Holstein × Zebu calves in dual purpose milk production systems

Menezes, Gustavo de Castro de Chamon; Filho, Sebastião de Campos Valadares; López‐Villalobos, N.; Ruas, José Reinaldo Mendes; Detmann, Edênio; Zanetti, Diego; Menezes, A. de C.; Morris, S. T.; Mariz, Lays Débora Silva; Duarte, Márcio de Souza

doi:10.1007/s11250-015-0832-5

Cited by 6 publications

(3 citation statements)

References 20 publications

(18 reference statements)

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“…(5,9,18). de-Castro et al (19) reportaron que, la ganancia diaria de peso (1.12 kg/día) fue más eficiente al dar alimento a los becerros por periodos más prolongados (≥180 días) en comparación con periodos cortos (≤90 días; 0.91 kg/día), además de ser más costoso. De ahí el beneficio de dar complementación alimenticia a becerros durante la etapa posdestete.…”

Section: Resultsunclassified

Efecto del amamantamiento restringido y complementación alimenticia sobre el peso y cortisol en becerros Simbrah

et al. 2020

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Objetivo. Determinar el efecto del amamantamiento restringido, destete precoz y complementación alimenticia sobre las ganancias de peso y concentración plasmática de cortisol en becerros Simbrah. Materiales y métodos. Se utilizaron 120 becerros lactantes de 15 días de edad, distribuidos en dos tratamientos: T1) becerros con amamantamiento restringido, destete precoz y complementación alimenticia (n=30 machos/n=30 hembras) y T2) becerros con amamantamiento continuo sin complementación alimenticia (n=30 machos/n=30 hembras). Los becerros se pesaron al inicio del experimento, y cada 15 días para evaluar los cambios en peso corporal del destete hasta los 10 meses de edad. Los muestreos sanguíneos se realizaron al inicio del estudio y durante 10 días, entre las 7:30 y 8:30 am. Las variables de respuesta se evaluaron usando modelos lineales generales. Resultados. El peso (310.1 y 268.5 kg) y ganancia de peso postdestete (0.980 kg/día y 0.800 kg/día) fue mejor en el tratamiento T1 que, para los becerros en T2 (168.3 y 159.6 kg/día; y -0.500 y -0.480 kg/día) para machos y hembras, respectivamente. La concentración de cortisol (ng/mL) fue mayor en T1 comparado con T2 del día 0 al día 3 (p<0.05), pero el día 4 no se encontró diferencia. El T1 permitió el destete a los 3.5 meses de vida de los becerros e incrementó la ganancia de peso posdestete. Conclusiones. El peso vivo y ganancia de peso posdestete fue mejor en los animales del tratamiento T1; sin embargo, los niveles de cortisol plasmáticos se incrementaron al inicio del estudio para disminuir posteriormente.

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Section: Resultsunclassified

Efecto del amamantamiento restringido y complementación alimenticia sobre el peso y cortisol en becerros Simbrah

et al. 2020

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“…También Magaña et al (2014), reporta un incremento de 2 litros de leche por vaca por día en ranchos DP de Yucatán, que suplementaron con concentrados y ordeñaron de manera mecanizada en comparación con aquellas a las que no se les dio concentrado y se ordeñaron de manera manual. Chamon et al (2015) evaluó el impacto de diferentes estrategias de alimentación en la producción de leche, con vacas F1 en Brasil, reportan incremento de hasta 3 litros de leche cuando se usa alimento concentrado por más de 180 días por año.…”

Section: Impacto Económico a Nivel De Up Del Uso De Tecnología De Dob...unclassified

Evaluación Del Impacto en La Productividad Y Rentabilidad De La Tecnología Transferida Al Sistema De Bovinos De Doble Propósito Del Trópico Mexicano

Espinosa Garcia,

Veléz Izquierdo,

Cuevas Reyes

et al. 2018

Trop Subtrop Agroecosyst

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<p>The objective is to evaluate the impact on productivity and profitability of use of technological practices nutrition, reproduction, feed, health, enterprise management and management of the milking, promoted by the technical assistance received by the producers of the BDP system in the tropics of Mexico. 206 monthly information on production units (UP) dual purpose cattle was analyzed in the states of Campeche, Colima, Nayarit, Sinaloa and Veracruz who received technical assistance and training livestock during fiscal years 2011 and 2012 was captured stratification was obtained technological producers applying multivariate methods, with the resulting groups indicators milk production were estimated per cow per day (PLVD), daily weight gain (GDP), profitability (Re) and unit costs of milk (CUPL) and meat (CUPC) to assess the impact of technology through a univariate analysis and test averages. Two types of producers were identified: 1) low technological level (76%), which apply on average 33% of innovations; 2) intermediate technological level (24%), which use on average 66% of innovations. By comparing the productive and economic variables of the two types of producers, it was found that those who use more innovations get more milk production, 8% more profitability and save $ 1.42 per kg of meat produced. It is concluded that by applying more components related to animal nutrition, herd health and production unit management improves the profitability and productivity of BDP producers.</p>

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“…The weight of cows is an important parameter for their growth and development [ 1 , 2 , 3 ]. Notably, weight provides an important basis for breeding staff to determine the production performance of cows, for implementing appropriate feeding strategies [ 4 , 5 , 6 ], for determining nutrition [ 7 ], and for establishing medicine doses. Weight is also an important reference index related to the age of mating, reproductive performance [ 8 , 9 , 10 ], and the time of delivery [ 11 , 12 ].…”

Section: Introductionmentioning

confidence: 99%

Research on a Dynamic Algorithm for Cow Weighing Based on an SVM and Empirical Wavelet Transform

Ningning

Han

et al. 2020

Sensors

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Weight is an important indicator of the growth and development of dairy cows. The traditional static weighing methods require considerable human and financial resources, and the existing dynamic weighing algorithms do not consider the influence of the cow motion state on the weight curve. In this paper, a dynamic weighing algorithm for cows based on a support vector machine (SVM) and empirical wavelet transform (EWT) is proposed for classification and analysis. First, the dynamic weight curve is obtained by using a weighing device placed along a cow travel corridor. Next, the data are preprocessed through valid signal acquisition, feature extraction, and normalization, and the results are divided into three active degrees during motion for low, medium, and high grade using the SVM algorithm. Finally, a mean filtering algorithm, the EWT algorithm, and a combined periodic continuation-EWT algorithm are used to obtain the dynamic weight values. Weight data were collected for 910 cows, and the experimental results displayed a classification accuracy of 98.6928%. The three algorithms were used to calculate the dynamic weight values for comparison with real values, and the average error rates were 0.1838%, 0.6724%, and 0.9462%. This method can be widely used at farms and expand the current knowledgebase regarding the dynamic weighing of cows.

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Effect of feeding strategies on weaning weight and milk production of Holstein × Zebu calves in dual purpose milk production systems

Cited by 6 publications

References 20 publications

Efecto del amamantamiento restringido y complementación alimenticia sobre el peso y cortisol en becerros Simbrah

Efecto del amamantamiento restringido y complementación alimenticia sobre el peso y cortisol en becerros Simbrah

Evaluación Del Impacto en La Productividad Y Rentabilidad De La Tecnología Transferida Al Sistema De Bovinos De Doble Propósito Del Trópico Mexicano

Research on a Dynamic Algorithm for Cow Weighing Based on an SVM and Empirical Wavelet Transform

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