Behavioural adaptation of grazing dairy cows to changes in feeding management: do they follow a predictable pattern?

Chilibroste, P.; Gibb, M. J.; Soca, P.; Mattiauda, D. A.

doi:10.1071/an14484

Cited by 37 publications

(43 citation statements)

References 52 publications

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“…The length of the first meal (198 min) for CSC LowRFI and CSC HighRFI fell within ranges reported in the literature (Soca et al, 2014;Chilibroste et al, 2015). Compared with CSC HighRFI , CSC LowRFI had a shorter first meal, but this meal represented a larger proportion of the total morning grazing time and the interval between the first and second meal was shorter.…”

Section: Short Communicationsupporting

confidence: 56%

Short communication: Grazing pattern of dairy cows that were selected for divergent residual feed intake as calves

Gregorini

Waghorn

Kuhn-Sherlock

et al. 2015

Journal of Dairy Science

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The aim of this study was to investigate and assess differences in the grazing pattern of 2 groups of mature dairy cows selected as calves for divergent residual feed intake (RFI). Sixteen Holstein-Friesian cows (471±31kg of body weight, 100 d in milk), comprising 8 cows selected as calves (6-8 mo old) for low (most efficient: CSCLowRFI) and 8 cows selected as calves for high (least efficient: CSCHighRFI) RFI, were used for the purpose of this study. Cows (n=16) were managed as a single group, and strip-grazed (24-h pasture allocation at 0800h) a perennial ryegrass sward for 31 d, with measurements taken during the last 21 d. All cows were equipped with motion sensors for the duration of the study, and jaw movements were measured for three 24-h periods during 3 random nonconsecutive days. Measurements included number of steps and jaw movements during grazing and rumination, plus fecal particle size distribution. Jaw movements were analyzed to identify bites, mastication (oral processing of ingesta) during grazing bouts, chewing during rumination, and to calculate grazing and rumination times for 24-h periods. Grazing and walking behavior were also analyzed in relation to the first meal of the day after the new pasture was allocated. Measured variables were subjected to multivariate analysis. Cows selected for low RFI as calves appeared to (a) prioritize grazing and rumination over idling; (b) take fewer steps, but with a higher proportion of grazing steps at the expense of nongrazing steps; and (c) increase the duration of the first meal and commenced their second meal earlier than CSCHighRFI. The CSCLowRFI had fewer jaw movements during eating (39,820 vs. 45,118 for CSCLowRFI and CSCHighRFI, respectively), more intense rumination (i.e., 5 more chews per bolus), and their feces had 30% less large particles than CSCHighRFI. These results suggest that CSCLowRFI concentrate their grazing activity to the time when fresh pasture is allocated, and graze more efficiently by walking and masticating less, hence they are more efficient grazers than CSCHighRFI.

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Section: Short Communicationsupporting

confidence: 56%

Short communication: Grazing pattern of dairy cows that were selected for divergent residual feed intake as calves

Gregorini

Waghorn

Kuhn-Sherlock

et al. 2015

Journal of Dairy Science

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“…(Jones & Condit, 1948) Tropical areas have short dim morning and afternoon areas from the equator, the longer the duration of the dim morning and afternoon. (Chilibroste et al, 2015) This condition causes the outdoor area continuously exposed to sunlight, which means the increasing the insolation throughout the surface area, such as building facade and ground area. (Wang & Liu, 2002) Meanwhile, it is suggested that buildings are exposed to sunlight at least for 4 hours, so that the buildings are protected from humidity.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Design and Planing VHS Building Using Chronolux

Paramita

Kamilia

Nurhidayat

et al. 2016

IJOST

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Gedebage integrated vocational high school (SMK) is a school which accommodates the concept of technopolis. The school has four programs: building engineering, family welfare education (PKK/food service), mechanical engineering, and tourism - which produce skilled and ready-to-work graduates. This article aims to recommend the sun exposure toward the building of the school, which is related to site planning and design strategies based on the duration of solar radiation on vegetation, and building facades as well as the distance between buildings through the use of Chronolux plug-in on Sketch-up Software. From the measurement, it is found that vegetation can reduce sky view factors (SVF) from 76.4 to 38.87%. For the building façade, it is able to reduce sun exposure from 4 hours 51 minutes to 3 hours 19 minutes with SVF from 47.26 to 38.11%. Meanwhile, the building distance of 9 m receives sun exposure from 9:00 am to 3.42 pm.

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“…Forraje desaparecido: Resumen de las variables seleccionadas para el modelo de regresión múltiple por método de selección stepwise (SAS, 2010). la estructura original de la pastura (masa y altura de forraje previo al pastoreo) afecta la tasa de consumo, la eficiencia de utilización y el consumo total de MS. En una revisión reciente (Chilibroste et al, 2015) han demostrado el impacto del tiempo de acceso la pastura sobre el tiempo efectivo de pastoreo de los animales y en consecuencia sobre la eficiencia de cosecha de forraje por unidad de tiempo. Los antecedentes de estudio del efecto de la AF sobre el CMS no han incluido hasta el momento la variable tiempo de acceso a la pastura (Delagarde y O´Donovan, 2005).…”

Section: Forraje Desaparecidounclassified

Control de intensidad de defoliación sobre la producción de forraje estacional y total en sistemas lecheros

Zibil

Zanoniani

Bentancur

et al. 2016

agrosur

Self Cite

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This study aimed to determine the effect of controlling the intensity of defoliation (ID) on forage production and herbage disappearance in eight commercial farms, in a complete randomized block design. Two blocks were selected in each farm to compare, the grazing management routine of the farm (T0) vs. controlled management (T1, pre grazing height 15-20 cm and post grazing height 5-7 cm). Pre grazing sward height (SH), herbage mass (HM, kg DM ha-1) and daily growth rate (GR, kg DM ha-1 d-1) were determined. In average, SH was lower (p <0.05) in autumn (A) and winter (W) (15.5 ± 1.2 and 16.9 ± 1 cm) than in spring (Sp) and summer (Su) (19.8 ± 1.0 and 21.1 ± 1.2 cm). The same trend (p <0.05) followed HM (A: 1250 ± 164; W: 1476 ± 145; Sp: 1914 ± 140; Su: 2564 ± 167 kg DM ha-1). Average GR was 26.5% higher in T1 than in T0 (p <0.05), and significant differences remained throughout the seasons (A: 19.3 ± 4.3 vs 7.0 ± 3.9; W: 21.3 ± 3.4 vs 17.0 ± 3.0; Sp: 39.6 ± 9.0 vs 33.4 ± 2.5 Su: 43.5 ± 4.2 vs 39.7 ± 4, 0 kg DM ha-1 d-1 ; p <0.05, for T1 and T0 respectively). In average, T1 yielded 2336 kg DM ha-1 extra when compared to T0, 52% of that was produced in A (p<0.05). Herbage allowance (HA), HM, length of the grazing and SH explained most of the variation (R 2 =0.75) of the disappeared forage per hectare (offered-rejected). Controlled grazing management increased herbage production and utilization by dairy cows.

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Behavioural adaptation of grazing dairy cows to changes in feeding management: do they follow a predictable pattern?

Cited by 37 publications

References 52 publications

Short communication: Grazing pattern of dairy cows that were selected for divergent residual feed intake as calves

Short communication: Grazing pattern of dairy cows that were selected for divergent residual feed intake as calves

Optimization of Design and Planing VHS Building Using Chronolux

Control de intensidad de defoliación sobre la producción de forraje estacional y total en sistemas lecheros

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