Avaliação do comportamento ingestivo de vacas leiteiras em pastejo de Brachiaria brizantha recebendo diferentes teores de concentrado na dieta

Mendes, F. B. L.; Silva, Fabyano Fonseca e; Silva, Robério Rodrigues; Carvalho, Gleidson Giordano Pinto de; Cardoso, Elisângela Andrade Moreira; Neto, Aires Lima Rocha; Oliveira, J.S.; Costa, Lucas Teixeira; Júnior, Hermógenes Almeida de Santana; Pinheiro, Alyson Andrade

doi:10.5433/1679-0359.2013v34n6p2977

Cited by 7 publications

(5 citation statements)

References 7 publications

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“…These results agree with those reported by Mendes et al (2013), who found an increasing linear effect as they increased the concentrate levels in the diets.…”

Section: Discussionsupporting

confidence: 95%

Ingestive behavior of grazing steers fed increasing levels of concentrate supplementation with different crude protein contents

Mendes

Silva

Carvalho

et al. 2014

Trop Anim Health Prod

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This study aimed to evaluate the ingestive behavior of steers on Brachiaria brizantha pasture fed diets with increasing levels of concentrate supplementation. Thirty-two crossbred steers in the finishing phase with average weight of 420 ± 8 kg were distributed in a completely randomized design with four treatments and eight replicates per treatment. Their behavior was assessed every 5 min for 24 h, in the middle of the experimental period. Variance and regression analyses at 0.05 % probability were adopted. The times spent grazing and ruminating reduced linearly (P <0.05), whereas the times spent at the trough (eating) and on other activities increased linearly (P <0.05) as the supplementation levels were elevated. The total feeding and chewing times decreased linearly (P <0.05) as the concentrate levels in the diet were elevated. By increasing the supplementation levels, the number of bites per day decreased linearly (P <0.05), and the feed efficiency of dry matter increased quadratically. Rumination efficiency of dry matter increased linearly (P <0.05) with increasing levels of concentrate supplementation. Grazing and rumination activities are reduced when the time devoted to other activities and at the trough are increased, as a result of the substitution effect.

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“…These results agree with those reported by Mendes et al (2013), who found an increasing linear effect as they increased the concentrate levels in the diets.…”

Section: Discussionsupporting

confidence: 95%

Ingestive behavior of grazing steers fed increasing levels of concentrate supplementation with different crude protein contents

Mendes

Silva

Carvalho

et al. 2014

Trop Anim Health Prod

Self Cite

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“…No effects of NDF intake were observed with the increasing DCAB (p > 0.05). The average NDF intake was 6.13 kg day -1 or 1.53% body weight, which is within the Brazilian average and close to the 6.7 kg day -1 found by Mendes et al (2013) in lactating crossbred cows receiving diets with concentrate levels.…”

Section: Resultssupporting

confidence: 83%

Production and marginal analysis of lactating cows subjected to dietary cation-anion balances

Figueiredo

Júnior

Mendes

et al. 2021

Acta Sci. Anim. Sci.

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The objective of this study was to evaluate productive, nutritional, and economic traits in lactating cows on pasture fed diets with different cation-anion balances (DCAB). Ten lactating ¾ Holstein × ¼ Dairy Gyr cows in the middle third of lactation, at an average age of 70 ± 4.6 months and an average body weight of 400 ± 55.2 kg, were distributed into five treatments in a 5 × 5 Latin square experimental design with two simultaneous squares. Treatments consisted of diets with DCAB of +237, +258, +294, +347, or +419 mEq dry matter (DM). No effects of intake were observed. There was no significant effect of DCAB on milk yield. The milk protein content was not influenced by the DCAB. Body condition score was not significantly affected by the DCAB. The apparent digestibilities of dry matter and nutrients (crude protein, neutral detergent fiber, ether extract, non-fibrous carbohydrates, and total digestible nutrients) were not affected by the DCAB. Marginal rate of return did not show significant differences. Under good conditions of pasture, forage availability, and quality associated with the lactation phases of the cows, all diets were efficient in milk production, dry matter intake, and digestibility. However, in economic terms, the most attractive DCAB was +237 mEq kg-1 DM.

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“…Ferro et al (2019) described similar values in an observation of the other behavioral activities of ½ and ¾ HG animals. Mendes et al (2013) found that ½ HG dairy cows devoted 23.05% of their total observed time to other activities, almost twice as much as in the present study. This variation may be due to the comfort encountered by the animal in the environment, which can increase social interactions, body care, locomotion and playful behaviors.…”

Section: Mendes Et Al (2013) Evaluated the Feeding Behavior Of Dairysupporting

confidence: 65%

Behavioral, productive, reproductive and thermoregulatory performance of lactating 3/4 and 7/8 Holstein/Gir cows

Ferro¹,

Ferro²,

Santos³

et al. 2021

Semina: Ciênc. Agrár.

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The aim of this study was to examine the behavioral, productive, reproductive and thermoregulatory performance of 3/4 and 7/8 Holstein/Gir (HG) dairy cows to identify which genetic composition suffers the least heat stress. A completely randomized design was adopted involving 20 multiparous, lactating crossbred cows from a dairy farm located in the municipality of Turvânia - GO, Brazil. During the experimental period, data on behavioral, productive, reproductive and thermoregulatory traits were collected every 15 days. Bioestat (5.0) statistical software was used for statistical analysis. The mean temperature-humidity index, ambient temperature and relative humidity obtained throughout the experimental period were 74.45, 30.51 ºC and 63.64%, respectively. In terms of reproductive performance, there was a significant difference (p < 0.05) between the genetic compositions for the time from calving to first service, with a longer period shown by the animals with greater Holstein breed genetic composition. Service period and calving interval differed significantly (p < 0.05) during the experimental period between the genetic compositions. A significant difference (p < 0.05) was also detected between the compositions for respiratory rate, with higher values observed in the animals with higher European genetic composition. Benezra thermal comfort index also differed significantly (p < 0.05), with the 7/8 HG animals showing a higher value. Lactating cows with a 7/8 HG genetic composition achieved better results in milk production, whereas those with 3/4 HG genetic composition showed superiority in milk fat composition and reproductive and thermoregulatory performance, indicating greater adaptation to the climatic conditions of the region.

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Avaliação do comportamento ingestivo de vacas leiteiras em pastejo de Brachiaria brizantha recebendo diferentes teores de concentrado na dieta

Cited by 7 publications

References 7 publications

Ingestive behavior of grazing steers fed increasing levels of concentrate supplementation with different crude protein contents

Ingestive behavior of grazing steers fed increasing levels of concentrate supplementation with different crude protein contents

Production and marginal analysis of lactating cows subjected to dietary cation-anion balances

Behavioral, productive, reproductive and thermoregulatory performance of lactating 3/4 and 7/8 Holstein/Gir cows

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