Hábito de pastejo de vacas lactantes Holandês x Zebu em pastagens de Brachiaria brizantha e Brachiaria decumbens

Zanine, A. M.; Santos, Edson Mauro; Parente, Henrique Nunes; Ferreira, Daniele Mendonça; Cecon, Paulo Roberto

doi:10.1590/s0102-09352007000100029

Cited by 13 publications

(9 citation statements)

References 3 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…For the variable grazing time, there was a quadratic effect with maximum point of inclusion at 4.61% castor meal, and the value found herein for the maximum grazing time was 700 minutes, within the range reported by Euclides et al (2000), which claims that, in general, grazing time varies from 420 to 720 minutes a day and very close to that registered by Zanine et al (2007), who also worked with Brachiaria brizantha and verified an average of 649.2 grazing minutes per day. Variations in the grazing time can be attributed to the passage rate of the feed through the rumen and the consumption/ demand ratio (CARVALHO, 1997).…”

Section: Resultssupporting

confidence: 90%

Feeding behavior of dairy cows fed different levels of castor meal in the diet

Souza

Silva

Schio

et al. 2016

SCA

View full text Add to dashboard Cite

This study aimed to evaluate the inclusion of castor meal in the diet of lactating cows in grazing system and its implications in feeding behavior. Eight Holstein x Zebu crossbred cows, with average milk production adjusted to 300 days in the previous lactation, between 5000 and 6000 kg and 100.33 ± 13.33 days of lactation and average body weight of 509.47 ± 61.90 kg, were distributed in two 4 x 4 Latin squares, with 4 levels of castor meal inclusion in the total diet, and using Brachiaria brizantha pasture as roughage. The experiment consisted of four experimental periods, lasting 21 days each. In each trial, the roughage and supplements were collected for evaluation of chemical composition. Animals were subjected to visual observation for evaluation of feeding behavior for 24 hours, from the 20 th to the 21 st day of each experimental period. The observations of the activities were recorded every five minutes.We determined the number of ruminating chews and the time spent in rumination of each ruminal bolus with the use of digital stopwatch. There was a quadratic effect for the grazing time with maximum point of inclusion of castor meal at 4.61% in the diet; other variables did not differ: rumination, idleness, trough, rumination efficiency, feeding and grazing time, rumination and idleness. Castor meal can be included in the diet with levels up to 10%, for little changes in the feeding behavior of animals.

show abstract

Section: Resultssupporting

confidence: 90%

Feeding behavior of dairy cows fed different levels of castor meal in the diet

Souza

Silva

Schio

et al. 2016

SCA

View full text Add to dashboard Cite

show abstract

“…Although grazing time was higher (p < 0.05) in the ICLF system (Table 3), leisure activity was not different between the systems. Although the resting time spent is distributed throughout the day, heifers prefer doing it during the dawn and early morning (Zanine, Santos, Parente, Ferreira, & Cecon, 2007), which explains the peaks of resting times observed in the ICLF system at 04:00 and 06:00 ( Figure 5). Tree shading in ICLF allowed the heifers to rest according to the period of their preference, while in the ICL system, the animals concentrated this activity preferably at 09:00 when the THI reached the value of 83 ( Figure 5) and at 22:00, just after a rumination peak (Figure 4).…”

Section: Resultsmentioning

confidence: 99%

Thermal comfort and grazing behavior of Girolando heifers in integrated crop-livestock (ICL) and crop-livestock-forest (ICLF) systems

Souza

Salman

Cruz

et al. 2019

Acta Sci. Anim. Sci.

View full text Add to dashboard Cite

To compare the integrated crop-livestock-forest (ICLF) and crop-livestock (ICL) systems in relation to thermal comfort and grazing behavior of Girolando heifers, a 2 × 2 crossover trial (two system and two periods) was carried out with eight ¾ Holstein × ¼ Gyr heifers in Xaraés–palisade grass pasture under intermittent stocking with 10 days of occupation period and 20 days of resting. In ICLF, crown cover of eucalyptus planted in rows was 65% at the beginning of the experiment. Animal behavior was assessed through bioacoustics by recording heifers’ sounds for 48 hours. Concomitantly, heifers’ internal temperature (IT,°C) was recorded every 10 min using data logger thermometers adapted to hormone-free intravaginal devices. Air temperature and humidity data were collected by thermohygrometers located in the center of ICLF and ICL for calculating Temperature–Humidity Index (THI). According to THI values, ICLF and ICL did not vary in terms of thermal comfort. However, THI indicated moderate stress (82.26±4.40) during day (06:00 to 17:59h) and mild stress (75.76±4.38) at night (18:00 to 05:59h) in both systems. During day, heifers from ICL had significantly (p < 0.05) higher IT (39.51±0.56oC) than those from ICLF (39.41±0.56oC); the former spent more time grazing and less time drinking water in ICLF (581.35±30.1 and 4.87±1.09 min, respectively) when compared with those from ICL (436.88±28.1 and 10.25±1.09 min, respectively). Therefore, although thermal comfort index did not vary between the systems, under moderate stress, crossbred heifers have lower internal temperatures, resulting in longer diurnal grazing and shorter water drinking time in Eucalyptus-shaded pastures.

show abstract

“…No sistema com amendoim forrageiro, o menor (P<0,05) tempo de ócio, verificado em dezembro, foi devido à maior necessidade de seleção da forragem, atribuída à composição do pasto com elevada participação de material morto e ao menor valor nutritivo do pasto na entrelinha (Tabelas 2 e 3). O tempo médio de ócio de 19,75% (3 h e 57 min) é inferior ao encontrado em estudo desenvolvido por Olivo et al (17) , que verificaram 5h e 8 min de ócio em 20 horas de observação, e aos encontrados por Zanine et al (23) , estudando vacas Holandês x Zebu no terço inicial de lactação em pastejo contínuo de Brachiaria decumbens ou Brachiaria brizantha, encontrando 4h e 47 min e 4h e 59 min para as respectivas pastagens. Essas comparações apontam que os animais demandaram mais tempo para selecionar sua dieta, implicando em menor tempo de ócio, justificado pela mistura forrageira que apresenta picos e ciclos diferenciados de produção.…”

Section: Resultsunclassified

Comportamento Ingestivo De Vacas Em Lactação Em Pastagem Consorciada No Período Estival

et al. 2016

View full text Add to dashboard Cite

ResumoA pesquisa teve como objetivo estudar o comportamento ingestivo de vacas da raça Holandesa em lactação, durante o período estival, em pastagens constituídas por capim-elefante (Pennisetum purpureum Schum.) e espécies de crescimento espontâneo, consorciadas com trevo branco (Trifolium repens L.) ou amendoim forrageiro (Arachis pintoi Krap. & Greg.). Foram feitas avaliações em três pastejos (dezembro, fevereiro e abril). Para cada avaliação utilizaram-se seis vacas entre o segundo e o quinto mês de lactação. O registro de dados foi realizado das 18 às 06 horas e das 08 às 16 horas, a cada 10 minutos. Os parâmetros comportamentais observados foram o tempo de pastejo em capimelefante, pastejo das espécies estabelecidas na entrelinha, pastejo total (pastejo do capim-elefante e da forragem na entrelinha), ruminação e ócio. O tempo médio de pastejo da entrelinha foi de 3h 48 min e 2h 9 min para os consórcios com o trevo branco e amendoim forrageiro, respectivamente, sendo superior (P<0,05) para a primeira mistura de forrageiras. O tempo médio de pastejo diário do capim elefante foi de 5h 32 min e 6h 27 min, para os respectivos consórcios, não havendo diferença entre eles. Para os tempos de ruminação e ócio houve similaridade entre as pastagens estudadas. Palavras-chave: capim-elefante; etologia; pastejo rotacionado; valor nutritivo Abstract This research aimed to study the behavior of Holstein lactating cows, during the warm-season on a pasture constituted by elephant grass (Pennisetum purpureum Schum.) and spontaneous growing species intercropped with white clover (Trifolium repens L.) or forage peanut (Arachis pintoi Krap & Greg.). Evaluations were taken during three grazing in December, February, and April. Six cows between the second and fifth lactation month were used for each evaluation. The data were recorded at a 10 min-interval, from 6 P.M. to 6 A.M. and from 8 A.M. to 4 P.M. The grazing time on elephant grass, on species established in space between lines, total grazing (elephant grass and species established in space between lines), rumination and idleness were the behavioral parameters observed. The average of grazing was 3h 48 min and 2h 9 min for pastures intercropped with white clover and forage peanut, respectively, being higher (P <0.05) for the first intercropped forage. The average of the grazing on elephantgrass was 5h 32 min and 6h 27 min for the respective intercropped pastures systems, with

show abstract

Hábito de pastejo de vacas lactantes Holandês x Zebu em pastagens de Brachiaria brizantha e Brachiaria decumbens

Abstract: RESUMO Avaliou

Cited by 13 publications

References 3 publications

Feeding behavior of dairy cows fed different levels of castor meal in the diet

Feeding behavior of dairy cows fed different levels of castor meal in the diet

Thermal comfort and grazing behavior of Girolando heifers in integrated crop-livestock (ICL) and crop-livestock-forest (ICLF) systems

Comportamento Ingestivo De Vacas Em Lactação Em Pastagem Consorciada No Período Estival

Contact Info

Product

Resources

About