Comportamento ingestivo de novilhos de corte sob diferentes alturas de pastejo do capim Tanzânia

Barbero, Rondineli Pavezzi; Barbosa, Marco Aurélio Alves de Freitas; Castro, Letícia Maria de; Ribeiro, Edson Luís de Azambuja; Mizubuti, Ivone Yurika; Júnior, Fernando Luiz Massaro; Silva, Leandro das Dôres Ferreira da

doi:10.5433/1679-0359.2012v33supl2p3287

Cited by 3 publications

(3 citation statements)

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“…In both experiments, bulls maintained in pastures with managed greater grazing heights showed an increase in rumination time. Grazing cattle tend to be selective, consuming plant fractions of higher nutritional value, such as green leaves, regardless of grazing heights (Barbero et al 2012). Nonetheless, pastures with greater grazing heights tend to have increased fibrous tissues because of advanced maturity of plant tissues (Bircham and Hodgson 1983), which also agrees with the observed IVDMD in both experiments.…”

Section: Discussionsupporting

confidence: 76%

Supplementation level increasing dry matter intake of beef cattle grazing low herbage height

Barbero

Malheiros

Aguilar

et al. 2020

Journal of Applied Animal Research

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To evaluate the foraging behaviour of yearling bulls grazing on Marandu grass, we conducted two experiments. In the first experiment (Exp. 1), three grazing heights of 15, 25, and 35 cm were evaluated, with bulls receiving 0.3% of body weight (BW) of supplement (161 g kg-1 crude protein (CP) and 20.1 MJ kg-1 gross energy (GE)); in the second experiment (Exp. 2), supplementation levels were decreased as grazing height increased: (1) low height (15 cm) and high supplementation (0.6% BW: 142 g kg-1 CP and 18.9 MJ kg-1 GE (LH-HS)); (2) moderate height (25 cm) and moderate supplementation (0.3% BW: 161 g kg-1 CP and 20.1 MJ kg-1 GE (MH-MS)) or (3) high height (35 cm) without supplementation (HH-WS). Ingestive behaviour was evaluated by direct visual observations, and intake using markers. It was used 9 paddocks each experiment. The experimental design was completely randomized, analysing effects by polynomial orthogonal contrasts (Exp. 1) and Tukey test (Exp. 2). In Exp. 1, a linear decreasing response to daily grazing time (P < 0.01) was observed, whereas a linear increasing response to herbage intake (P < 0.01) was observed with increased grazing height. In Exp. 2, LH-HS bulls had lower herbage intake (P < 0.01) than their counterparts. Bulls from both experiments showed increased grazing activity after 12 PM (P < 0.05). The herbage intake substitution effect of supplements can be explored as a production strategy, as the adjustment of supplementation levels can promote high dry matter intake as well as performance in beef cattle, in conditions of low grazing height or low forage allowance, even with a high stocking rate.

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Section: Discussionsupporting

confidence: 76%

Supplementation level increasing dry matter intake of beef cattle grazing low herbage height

Barbero

Malheiros

Aguilar

et al. 2020

Journal of Applied Animal Research

Self Cite

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“…O aumento da participação de colmos no estrato superior do dossel (acessível ao pastejo) diminui a razão folha:colmo, podendo prejudicar o processo de apreensão da forragem e, desta forma, limitar o consumo da forragem pelo animal. De acordo com Barbero et al (2012), a taxa de bocado de animais em pastejo pode ser limitada pela condição morfológica do dossel, principalmente devido ao alongamento de colmos. Nesse contexto, haverá prejuízos na digestibilidade da dieta consumida, e, consequentemente, no desempenho animal (SILVA; NASCIMENTO JÚNIOR, 2007).…”

Section: Segundo Sbrissia E Silvaunclassified

“…Tanzânia) apresenta excelentes características agronômicas e nutricionais para ser utilizado na pecuária de corte (BARBERO et al, 2012). No entanto, o sucesso na utilização das pastagens não depende apenas da escolha da espécie forrageira ou da disponibilidade de nutrientes no solo, mas também da compreensão dos mecanismos morfofisiológicos inerentes à planta, da interação planta-animal-ambiente e do manejo de pastejo adotado (FAGUNDES et al, 2006).…”

Section: Introductionunclassified

Características morfogênicas do capim-Tanzânia consorciado com Estilosantes Campo Grande ou adubado com nitrogênio sob pastejo

et al. 2015

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ResumoObjetivou-se avaliar as características morfogênicas e estruturais do capim-Tanzânia (Panicum maximum cv. Tanzânia) consorciado com Estilosantes Campo Grande (Stylosanthes capitata e Stylosanthes macrocephala) ou adubado com nitrogênio. O pasto foi manejado sob lotação contínua e taxa de lotação variável. Foi utilizado delineamento experimental em blocos ao acaso com parcelas subdivididas, com três repetições. Os tratamentos foram: capim-Tanzânia + Estilosantes; capim-Tanzânia + 75 Kg N.ha.ano . Foram utilizados ureia e nitrato de amônia como fonte de nitrogênio. As avaliações morfogênicas foram realizadas na primavera e no verão. Foram avaliados 15 perfilhos por piquete, duas vezes por semana, durante quatro semanas por estação em estudo. As características morfogênicas, exceto a taxa de alongamento foliar (TAlF), não foram influenciadas pela adubação nitrogenada ou consórcio com Estilosantes. Os maiores valores para esta variável foram observados na primavera, nas pastagens adubadas. Desta forma, conclui-se que a adubação nitrogenada influencia a taxa de alongamento foliar (TAlF) do capim-Tanzânia, e este quando é cultivado em consórcio com o Estilosantes Campo Grande apresenta características morfogênicas semelhantes quando adubado com nitrogênio, à excessão da taxa de alongamento foliar. Palavras-chave: Consorciação, lotação contínua, morfogênese, Panicum maximum, taxa de alongamento foliar AbstractThis study aimed to study morphogenic and structural characteristics of Tanzania grass (Panicum maximum cv. Tanzania) intercropped with Estilosantes Campo Grande (Stylosanthes capitata and Stylosanthes macrocephala) or fertilized with nitrogen. The pasture was managed under continuous 1 Pós-Doutorando

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Effect of grazing management strategies on the yield and nutritional value of Marandu grass in the semiarid of Brazil

Araújo

Sales

Monção

et al. 2021

Semina: Ciênc. Agrár.

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The objective of this study was to evaluate the effects of two grazing management strategies on structural, productive and nutritional parameters of Marandu grass (Urochloa brizantha cv. Marandu). A completely randomized block design with two pasture management strategies and eight replications (blocks) was used. The grazing management strategies were: (1) low intensity rotational grazing (LI), with a pre-grazing sward height of 40 cm and a post-grazing sward height of 24 cm, i.e., a defoliation intensity of 50%; (2) High intensity rotational grazing (HI), with a pre-grazing sward height of 40 cm and a post-grazing sward height of 10 cm (±70% defoliation intensity). Pastures were sampled before and after grazing for estimation of forage mass, forage accumulation rate, structural characteristics, nutritional value and dry matter intake.The LI strategy resulted in higher dry matter production than HI before (18.33%) and after grazing (49.06%), increasing pre-grazing forage density by 13.21% (P < 0.05). The production of potentially digestible dry matter was highest (P < 0.05) in LI strategy (21.3% before and 39.6% after grazing, respectively). Higher post-grazing green forage mass (45%) increased the residual crude protein in LI. The LI management strategy increased forage mass production and can be used in Marandu grass pastures.

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Comportamento ingestivo de novilhos de corte sob diferentes alturas de pastejo do capim Tanzânia

Cited by 3 publications

References 4 publications

Supplementation level increasing dry matter intake of beef cattle grazing low herbage height

Supplementation level increasing dry matter intake of beef cattle grazing low herbage height

Características morfogênicas do capim-Tanzânia consorciado com Estilosantes Campo Grande ou adubado com nitrogênio sob pastejo

Effect of grazing management strategies on the yield and nutritional value of Marandu grass in the semiarid of Brazil

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