Use of individual cow milk recording data at the start of lactation to predict the calving to conception interval

Madouasse, Aurélien; Huxley, J.N.; Browne, William J.; Bradley, Andrew J.; Dryden, Ian L.; Green, Martin J.

doi:10.3168/jds.2010-3235

Cited by 40 publications

(40 citation statements)

References 34 publications

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“…La identificación y registros individuales permiten un seguimiento reproductivo y productivo por vaca, lo que favorece el resultado de la explotación y el desempeño reproductivo (19,20,21) . Por otro lado, abordar los retos de las tecnologías de gestión (Cuadro 3) permitirá a los productores avanzar en el diseño estratégico de la explotación con un enfoque innovador y competitivo (3,16) , ajustado al sistema, lo que es factible ya que el 95 % de los productores son propietarios de…”

Section: Pt Gestiónunclassified

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Identificación e implementación de paquetes tecnológicos en ganadería vacuna de doble propósito. Caso Manabí-Ecuador

Torres

Rivas

Pablos-Heredero

et al. 2015

RMCP

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El avance en los sistemas ganaderos se asocia a la implementación de tecnologías en la producción y a la mejora de sus ingresos. El objetivo del presente estudio fue la identificación e implementación de paquetes tecnológicos y su relación con los resultados productivos en vacuno de doble propósito de la provincia de Manabí, Ecuador en dos zonas climáticas: el Bosque seco tropical y el húmedo tropical. Se agrupan 25 tecnologías en seis paquetes tecnológicos (PT) seleccionadas mediante una metodología cualitativa y participativa. Se realizaron entrevistas en una muestra de 41 explotaciones para evaluar la implementación de los paquetes tecnológicos, mediante estadística descriptiva, correlaciones de Sperman y regresiones múltiples. Se obtienen los mayores niveles de implementación en los paquetes de salud animal (76 %), uso de la tierra y alimentación (55 %). El PT de alimentación se correlaciona (P<0.01) con el PT de instalaciones (0.711) y de reproducción (0.774). Los PT explican 30 % de la variabilidad de la producción de leche, que es debida al uso de la tierra en el Bosque seco y a la salud animal en el Bosque húmedo. Esta investigación genera resultados preliminares respecto a la idententificación e implementación de los principales paquetes tecnológicos en la ganadería vacuna de doble propósito de Manabí -Ecuador, que están en proceso de mejora aunque sin perder los atributos que lo caracterizan. PALABRAS CLAVE: Paquetes tecnológicos, Doble propósito. ABSTRACT INTRODUCCIÓNEl sector bovino lechero adquiere gran importancia estratégica en Ecuador, con una producción diaria de 5.8 millones de litros y ocupando al 8 % de la población activa. La producción lechera se concentra principalmente en tres zonas geográficas: 1) La Sierra (77 %), con clima templado y modelo intensivo especializado, 2) La Costa (15 %) y 3) Amazonía (8 %), ambas con clima cálido y un modelo productivo de ganadería vacuna de doble propósito (1,2) .Para potenciar la mejora de los ingresos en las explotaciones familiares se requieren cambios tanto en la adopción de nuevas tecnologías, como en la organización de la explotación. En otras latitudes, los cambios realizados se han orientado principalmente al campo de la salud animal y calidad de la leche, el sistema de alimentación, la mecanización de los procesos y la mejora reproductiva y genética (3,4) . La incorporación de nuevas tecnologías conlleva la identificación, adopción e implementación de la tecnología por un lado y su difusión en el corto y mediano plazo por otro. La implementación tecnológica constituye un proceso complejo, resultante de la adecuación dinámica de distintos factores dentro de la explotación y en un contexto económico, social y cultural donde coexisten productores que la adoptan de modo temprano, en tanto que los rezagados retrasan su implementación (5) .La mejora de los ingresos se asocia directamente al nivel tecnológico utilizado, por lo que su implementación, efecto e impacto en la producción constituyen eventos claves que favorecen la competitividad del secto...

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Section: Pt Gestiónunclassified

“…Identification and individual records allow a reproductive and productive follow-up per cow, which favors the operational result and reproductive performance (19,20,21) .…”

Section: Tp Production and Commercializationmentioning

confidence: 99%

Identificación e implementación de paquetes tecnológicos en ganadería vacuna de doble propósito. Caso Manabí-Ecuador

Torres

Rivas

Pablos-Heredero

et al. 2015

RMCP

View full text Add to dashboard Cite

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“…Consequently, milk fat:protein ratios (MFPR) have been used to identify cows at risk of disease and subfertility in the postpartum period (Grieve et al, 1986;Geishauser et al, 1998;Heuer et al, 1999). However, a recent population study found that MFPR were unreliable predictors of fertility (Madouasse et al, 2010a). However, because different milk FA have different origins, they are likely to yield more information about the metabolic status of a cow than a generalized milk fat measure (Bauman and Griinari, 2001;Bauman et al, 2006).…”

Section: Introductionmentioning

confidence: 98%

The relationship between fatty acid profiles in milk identified by Fourier transform infrared spectroscopy and onset of luteal activity in Norwegian dairy cattle

Martin

Afseth

Köhler

et al. 2015

Journal of Dairy Science

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To investigate the feasibility of milk fatty acids as predictors of onset of luteal activity (OLA), 87 lactations taken from 73 healthy Norwegian Red cattle were surveyed over 2 winter housing seasons. The feasibility of using frozen milk samples for dry-film Fourier transform infrared (FTIR) determination of milk samples was also tested. Morning milk samples were collected thrice weekly (Monday, Wednesday, Friday) for the first 10 wk in milk (WIM). These samples had bronopol (2-bromo-2-nitropropane-1,3-diol) added to them before being frozen at -20°C, thawed, and analyzed by ELISA to determine progesterone concentration and the concentrations of the milk fatty acids C4:0, C14:0, C16:0, C18:0, and cis-9 C18:1 as a proportion of total milk fatty acid content using dry-film FTIR, and averaged by WIM. Onset of luteal activity was defined as the first day that milk progesterone concentrations were >3 ng/mL for 2 successive measurements; the study population was categorized as early (n=47) or late (n=40) OLA, using the median value of 21 DIM as the cutoff. Further milk samples were collected 6 times weekly, from morning and afternoon milkings, these were pooled by WIM, and one proportional sample was analyzed fresh for fat, protein, and lactose content by the dairy company Tine SA, using traditional FTIR spectrography in the wet phase of milk. Daily energy-balance calculations were performed in 42 lactations and averaged by WIM. Animals experiencing late OLA had a more negative energy balance in WIM 1, 3, 4, and 5, with the greatest differences been seen in WIM 3 and 4. A higher proportion of the fatty acids were medium chained, C14:0 and C16:0, in the early than in the late OLA group from WIM 1. In WIM 4, the proportion of total fatty acid content that was C16:0 predicted late OLA, with 74% sensitivity and 80% specificity. The long-chain proportion of the fatty acids C18:0 and cis-9 C18:1 were lower in the early than in the late OLA group. Differences were greatest in WIM 4 and 5. Differences in concentrations of cis-9 C18:1 were seen between the groups from WIM 1. No relationship was seen between OLA and milk concentrations of either protein or fat, or between OLA and the milk fat:protein ratio. The differences in milk fatty acid proportions between the 2 groups are most likely related to differences in energy balance. The study shows that frozen milk samples can be tested for fatty acids by FTIR spectroscopy and that FTIR spectroscopy of milk can be used to provide real-time information about cow reproductive function.

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“…Milk yield was unchanged when RUP concentration in the diet was increased before calving (van Saun et al, 1993), but milk protein percentage increased from 2.96 to 3.18%. Further, large observational studies suggest that reproductive performance is improved in cows with high milk protein concentration (Moss, 2001;Buckley et al, 2003;Morton, 2004;Madouasse et al, 2010). Further, large observational studies suggest that reproductive performance is improved in cows with high milk protein concentration (Moss, 2001;Buckley et al, 2003;Morton, 2004;Madouasse et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Precalving and early lactation factors that predict milk casein and fertility in the transition dairy cow

Rodney

Hall²,

Westwood³

et al. 2016

Journal of Dairy Science

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Multiparous Holstein cows (n=82) of either high or low genetic merit (GM) (for milk fat + protein yield) were allocated to 1 of 2 diets in a 2×2 factorial design. Diets differed in the ratio of rumen-undegradable protein (RUP) to rumen-degradable protein (37% RUP vs. 15% RUP) and were fed from 21 d precalving to 150 days in milk. This study evaluated the effects of these diets and GM on concentrations of milk casein (CN) variants and aimed to identify precalving and early lactation variables that predict milk CN and protein yield and composition and fertility of dairy cows. It explored the hypothesis that low milk protein content is associated with lower fertility and extended this hypothesis to also evaluate the association of CN contents with fertility. Yields (kg/d) for CN variants were 0.49 and 0.45 of α-CN, 0.38 and 0.34 of β-CN, 0.07 and 0.06 for κ-CN, and 0.10 and 0.09 of γ-CN for high- and low-RUP diets, respectively. Increased RUP increased milk, CN, and milk protein yields. Increased GM increased milk protein and γ-CN yields and tended to increase milk CN yield. The effects of indicator variables on CN variant yields and concentrations were largely consistent, with higher body weight and α-amino nitrogen resulting in higher yields, but lower concentrations. An increase in cholesterol was associated with decreased CN variant concentrations, and disease lowered CN variant yield. A diet high in RUP increased proportion of first services that resulted in pregnancy from 41 to 58%. Increased precalving metabolizable protein (MP) balance decreased the proportion of first services that resulted in pregnancy when evaluated in a model containing CN percentage, milk protein yield, diet, and GM. This finding suggests that the positive effects of increasing dietary RUP on fertility may be curvilinear because cows with a very positive MP balance before calving were less fertile than those with a lower, but positive, MP balance. Prepartum MP balance was important to production and reproductive outcomes, but surprisingly, metabolizable energy balance was not. The hazard of pregnancy in the first 150 d of lactation was 28% lower in cows producing milk with the lowest quartile of protein percentage compared with cows with milk in the upper 3 quartiles. Milk CN percentage was positively associated with improved pregnancy at first service. This study demonstrates the importance of protein metabolism to reproductive performance of the dairy cow.

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Use of individual cow milk recording data at the start of lactation to predict the calving to conception interval

Cited by 40 publications

References 34 publications

Identificación e implementación de paquetes tecnológicos en ganadería vacuna de doble propósito. Caso Manabí-Ecuador

Identificación e implementación de paquetes tecnológicos en ganadería vacuna de doble propósito. Caso Manabí-Ecuador

The relationship between fatty acid profiles in milk identified by Fourier transform infrared spectroscopy and onset of luteal activity in Norwegian dairy cattle

Precalving and early lactation factors that predict milk casein and fertility in the transition dairy cow

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