Use of mixed rations with different access time to pastureland on productive responses of early lactation Holstein cows

Fajardo, M. C.; Mattiauda, D. A.; Motta, G. P. R.; Genro, T. C. M.; Meikle, A.; Carriquiry, M.; Chilibroste, P.

doi:10.1016/j.livsci.2015.09.023

Cited by 19 publications

(40 citation statements)

References 18 publications

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“…Cows were randomly assigned during the first 60 days in milk (DIM) to one of the following three treatments as described by Fajardo et al. (): TMR ad libitum (G0) or a diet composed by TMR (50% DM of ad libitum intake) and grazing of pasture with either 6 hr of access time to paddock in one grazing session (08:00–14:00; G1) or 9 hr of access time to paddock in two sessions (08:00–14:00 and 17:00–20:00; G2). Treatments G0 ( n = 9), G1 ( n = 10) and G2 ( n = 8) accessed daily to the same offer of total DM differing on the dietary source (TMR vs. TMR + pasture).…”

Section: Methodsmentioning

confidence: 99%

Milk fatty acid profile from cows fed with mixed rations and different access time to pastureland during early lactation

Barca

Carriquiry

Olazábal

et al. 2017

Animal Physiology Nutrition

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Milk fatty acid (FA) profiles were determined in Holstein cows (n = 27) fed total mixed rations (TMR) ad libitum (G0) or diet composed by TMR (50% dry matter [DM] offered) plus grazing of pasture with 6 hr of access time to paddock in one session (G1) or 9 hr in two sessions (G2) at 45 days in milk (DIM). Moreover, milk FA was determined at 65 DIM when G0 cows turned out to G1 diet without adaptation period (Post-G0), G1 remained as controls. Milk FA was quantified using gas chromatography and mass spectrometry. Preformed FA at 45 DIM was greater (+27%) for G2 than G0 cows (p < .05). Stearic acid (C18:0) was 30% greater for G2 cows (p < .05). De novo FA was lowest for G2 cows (p < .05). Conjugated linoleic acid (CLA) did not differ (p < .12), while vaccenic acid (C18:1trans) was twofold greater for grazing treatments (p < .01). Linolenic acid [C18:3(n-3)] was greatest for G2 and lowest for G0 cows (p < .01). Omega 6 FA was greater for G0 than grazing cows, mainly due to linoleic acid [18:2cis(n-6); p < .05]. These results determined that n-6/n-3 ratio was almost threefold greater for G0 than grazing cows (p < .001). When diet of G0 cows changed to include pasture (Post-G0), preformed FA increased (p < .05), explained mainly by the increase (p < .05) of stearic (C18:0) and C18:1trans, while de novo FA tended to decrease (p < .1). Moreover, the amount of CLA and C18:3(n-3) tended to increase (p < .1) in Post-G0 cows. Offering 50% of dietary DM from pasture modified milk FA profile in early lactation potentially beneficial for human health. When TMR-fed cows were turned out to 50% pasture, milk FA profile reflected dietary change without need of an adaptation period.

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Section: Methodsmentioning

confidence: 99%

Milk fatty acid profile from cows fed with mixed rations and different access time to pastureland during early lactation

Barca

Carriquiry

Olazábal

et al. 2017

Animal Physiology Nutrition

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“…Indeed, DMI and grazing behavior of the same experimental treatments were reported by [6] that despite not finding differences in average DMI and grazing behavior between Post-TMR and PG cows after the change of diet, they reported lower grazing activity on Post-TMR during the last hours in the pasture. In addition, it is also known the transition from one diet type to another causes changes in the rumen microbiota and rumen stratification [21] [22].…”

Section: Discussionmentioning

confidence: 61%

“…Milk production decreased only in Post-TMR group after dietary change. Although this decrease could accompany the normal decline in the lactation curve around the peak of milk production [17], as it was only observed in Post-TMR cows, it was probably associated to a restriction in DMI and/or increased in energy requirements after the change of the diet [6]. It has been reported that not only characteristics of the pasture, but also its management can limit DMI of grazing animals [4] [18].…”

Section: Discussionmentioning

confidence: 99%

“…Therefore, in the present study we evaluated two treatments: Post-TMR (0 to 60 DIM fed TMR and 61 to 80 DIM fed pasture grazing + 50% TMR) and PG as a control group (0 to 80 DIM pasture grazing + 50% TMR). Details on cow feeding and management during the prepartum and early postpartum as well as productive, metabolic, endocrine and reproductive responses during the first 60 DIM have been previously reported [6] [7]. Cows were milked twice a day (5:00 and 15:00 h) and milk production was determined daily from 61 until 80 DIM of lactation.…”

Section: Animals and Experimental Designmentioning

confidence: 99%

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Metabolic Adaptations Due to the Inclusion of Pasture in the Diet of Dairy Cows Fed Total Mixed Ration during Early Lactation

Astessiano¹,

Meikle²,

Chilibroste³

et al. 2017

OJAS

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The aim of this study was to evaluate the metabolic adaptations due to the inclusion of pasture in the diet of dairy cows fed on a total mixed ration (TMR) ad libitum during early lactation. Multiparous cows (n = 18) were used in a randomized complete block design and were randomly assigned according to parity, BW and BCS to one of two feeding strategies from calving to 60 DIM: 1) cows fed TMR ad libitum (without access to pasture; 100% TMR) and 2) cows fed on a mixed system with pasture grazing (6 h of access to paddock in one grazing session, 8:00 to 14:00 h) and supplemented with 50% of ad libitum TMR (Pasture Group, PG). At 61DIM, TMR fed cows were assigned without an adjustment period to a similar feeding and management routine than PG group (Post-TMR), while PG cows remained in their original routine throughout the experiment. Thus, at 61DIM and thereafter, both, PG and Post-TMR cows grazed a second-year pasture and were supplemented with 50% TMR (DM basis). Milk production was determined daily until 80 DIM, and cow BCS and BW were registered and blood samples and liver biopsies were obtained one week before and one week after dietary change (−1 to +1 wk; +55 and +69 DIM). Milk yield, BW and BCS did not differ between treatments but decreased or tended to decreased from −1 to +1 wk only in Post-TMR cows. Serum IGF-1 tended to increase in Post-TMR cows. Hepatic expression of IGFBP5 and IGFBP6 mRNA, were greater while IGF1 and IGFBP3 mRNA tended to be greater for Post-TMR than PG cows. Hepatic expression of IGF1, IGFBP5 and IGFBP6 mRNA increased from −1 to + 1 wk only in Post-TMR cows. Expression of ACADVL and PDH1A mRNA had a 2-fold increase in both groups from wks −1 to +1. The results confirm that changes in feeding strategy without an adaptation period modified animal metabolism. The inclusion of grazing to cows that were fed TMR during early 128lactation, increased IGF-1 concentrations and modified hepatic expression of genes related with IGF system and fatty acid metabolism indicating redistribution of nutrients and energy towards maintenance requirements (increased due to walking and grazing activity) in detriment of milk production.

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“…Por tanto, si se quiere alcanzar el mayor potencial de producción de leche, el caprinoultor necesitará complementar la alimentación de las cabras de tal manera que esta cubra todos sus requerimientos nutricionales. Algunas evidencias se encuntran en reportes, donde, alimentos integrales han sido utilizados como complemento en vacas lecheras en pastoreo (Fajardo et al, 2015) con incrementos en producción de leche de hasta 30% (Sprunck et al, 2012) e incrementos en proteína y lactosa (Fajardo et al, 2015) respecto al tratamiento sin complementación. Sin embargo, la información disponible sobre complementar la alimentación de cabras locales de la Comarca Lagunera es limitada (Fitz-Rodríguez et al, 2009).…”

Section: Introductionunclassified

Uso de un alimento integral como complemento a cabras locales en pastoreo: respuesta en producción y composición química de la leche

Maldonado–Jáquez

Granados-Rivera

Hernández–Mendo

et al. 2017

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Uso de un alimento integral como complemento a cabras locales en pastoreo:respuesta en producción y composición química de la leche Use of total mixed ration as supplement in grazing local goats: Milk production response and chemical composition ResumenEn México, la población caprina se concentra en sistemas de producción extensivos, con hatos formados en mayoría por cabras que los productores llaman criollas, denominación ahora aceptada como locales. La alimentación de la cabra lechera en el sistema extensivo es a través del pastoreo, pero éste, por sí solo no puede satisfacer las necesidades nutricionales de la cabra. Por tanto, si se quiere aumentar la producción de leche, es necesario complementar la alimentación de las cabras en pastoreo. Al respecto, en rumiantes en pastoreo que han sido complementados con un alimento integral se han reportado aumentos en la producción de leche. Por lo tanto, el objetivo de estudio fue evaluar el efecto en la producción y composición de la leche de cabras locales en pastoreo complementadas con un alimento integral. Para ello, se realizaron dos experimentos. En el primero, se evaluó el efecto de cambiar de un sistema de pastoreo a uno estabulado, con el fin de desafiar a las cabras a que expresaran su potencial productivo al ofrecerles un alimento integral. En el segundo, se evaluó el efecto en producción de leche y componentes de la leche de cabras en pastoreo al complementarlas con diferentes niveles del alimento integral usado en el experimento 1. Los datos de producción de leche y composición química en leche de ambos experimentos fueron analizados utilizando un modelo de medidas repetidas. Los datos de peso vivo y condición corporal final de las cabras, se analizaron como un diseño completamente al azar. Se realizó un análisis de costos parciales en ambos experimentos, con el fin de conocer la viabilidad económica de los tratamientos. En el experimento 1, la concentración de grasa en leche no se modificó (p > 0.05) por efecto de tratamientos, pero si AbstractIn Mexico, the goat population is concentrated in extensive production systems in Mexico, with herds mainly formed by goats that the producers called Creoles, now accepted as a local name.The power of the goat dairy in the extensive production system, is through the grazing, but this alone cannot meet the nutritional needs of the goat. Therefore, if the producers want to increase the production of milk, it is necessary to supplement the grazing goat diet with grains. On this manner, some results report an increase in milk production in grazing ruminants supplemented with an integral diet. The aim of this study was to evaluate the effect on the production and composition of milk in grazing local goats supplemented with an integral feed. Two experiments were performed. The first, evaluated the effect of changing from a grazing system to intensive system, in order to challenge the goats to express their productive potential by providing them with an integral feed. In the second, it evaluated the effect in grazing lo...

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Use of mixed rations with different access time to pastureland on productive responses of early lactation Holstein cows

Cited by 19 publications

References 18 publications

Milk fatty acid profile from cows fed with mixed rations and different access time to pastureland during early lactation

Milk fatty acid profile from cows fed with mixed rations and different access time to pastureland during early lactation

Metabolic Adaptations Due to the Inclusion of Pasture in the Diet of Dairy Cows Fed Total Mixed Ration during Early Lactation

Uso de un alimento integral como complemento a cabras locales en pastoreo: respuesta en producción y composición química de la leche

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