Brachiaria humidicola (Rendle) Schweick em diferentes idades de rebrota submetida a doses de nitrogênio e potássio

Deminicis, Bruno Borges; Abreu, João Batista Rodrigues de; Vieira, Henrique Duarte; Araújo, Saulo Alberto do Carmo

doi:10.1590/s1413-70542010000500006

Cited by 8 publications

(5 citation statements)

References 5 publications

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“…Costa et al (2007) found that the recommended date to forage regrowth was between 28 and 42 days for Brachiaria brizantha cultivar Marandu and between 28 and 35 days for BRA-004308 and BRA-003395 genotypes. However, Deminicis, Abreu, Vieira, and Araújo (2010) reported that 56 regrowth days resulted in higher yield for Brachiaria humidicola. However, those works disregarded the structural evaluations of tissues, which may show declines in digestibility with increasing age.…”

Section: Resultsmentioning

confidence: 98%

Regrowth age modifies the leaf anatomy of Brachiaria genotypes

Mauri

Silva

Pereira

et al. 2018

Acta Sci. Biol. Sci.

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Changes in leaf anatomy were evaluated in genotypes of Brachiaria brizantha, Brachiaria decumbens, Brachiaria ruziziensis and three Brachiaria ruziziensis clones through tissue proportion in internerval and midrib regions at three regrowth ages. Plants were grown and cutting was performed after 60 days. Further, leaves were sampled at 8, 15 and 29 regrowth days and processed with usual plant microtechnique. The internerval region showed higher parenchyma percentage at 15 days for Clone 95 and similar values at 15 and 29 days for Clone 1. The proportion of vascular bundles was lower after 15 days in Clones 1 and 95 and 29 days in B. brizantha. In the midrib, the parenchyma proportion was higher at 29 days in B. brizantha and lower at 15 days in B. ruziziensis. The proportion of vascular bundles was higher at 8 days in B. decumbens, B. brizantha and Clone 1, and lower at 29 days for Clones 97 and 95 and at 8 days in B. ruziziensis. Therefore, the regrowth age modifies the percentage of leaf tissues in Brachiaria genotypes, in which the fibers and vascular bundles increase at 29 days and 8-day-old leaves are not fully developed.

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Section: Resultsmentioning

confidence: 98%

Regrowth age modifies the leaf anatomy of Brachiaria genotypes

Mauri

Silva

Pereira

et al. 2018

Acta Sci. Biol. Sci.

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“…Ademais, cabe ressaltar que o resultado encontrado neste trabalho é em produção de proteína bruta por área. A resposta em concentração de proteína bruta à adubação nitrogenada é menos evidente que a de produção de matéria seca (Mesquita, Neres, 2008;Deminicis et al, 2010), pois esse aspecto sofre maior limitação da variabilidade genética, uma vez que a herdabilidade da primeira pode variar entre 0,66 e 0,74 (Vogel et al, 1981;Figueiredo et al, 2012) e a da segunda está entre 0,47 e 0,57 (Jiang et al, 2014;Mateus et al, 2015;Simeão et al, 2016).…”

Section: Resultsunclassified

Estudo metanalítico da resposta de gramíneas perenes de verão à adubação nitrogenada

Bernardi

Silva

Baretta

2018

Arq. Bras. Med. Vet. Zootec.

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RESUMO O presente trabalho visou empregar um estudo metanalítico para sumarizar e analisar dados sobre adubação nitrogenada em pastagens formadas por gramíneas dos gêneros Brachiaria, Cynodon e Panicum. Foram selecionados 36 trabalhos de pesquisa realizados no Brasil nos últimos 10 anos, incluindo artigos científicos, teses e dissertações. Com base nos dados contidos nesses trabalhos, foi calculado o incremento relativo de matéria seca e de proteína bruta em relação ao tratamento controle (ausência de adubação nitrogenada) e a eficiência da utilização do nitrogênio na produção de matéria seca e proteína bruta. Os dados obtidos foram submetidos à análise de variância para efeito linear e quadrático em cada uma das variáveis dentro de cada gênero e, no caso de significância, foi realizada análise de regressão. A produção de matéria seca e de proteína bruta de forrageiras tropicais responde de forma expressiva à adubação nitrogenada, principalmente a segunda, porém o acréscimo nas doses de nitrogênio reduz a eficiência da adubação. Verificou-se uma frequente omissão de informações relevantes em trabalhos com adubação nitrogenada em pastagens.

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“…However, Alexandergrass exhibited lower DM content compared with the other treatments, which can potentially be explained by its higher leaf:stem ratio, which results in lower concentrations of dry material (Deminicis et al, 2010). Moreover, annual plants, such as Alexandergrass, accumulate less senescent material, unlike perennial species, which live for long periods in the soil.…”

Section: Discussionmentioning

confidence: 97%

Nutrient digestibility in horses of tropical grasses found in semi-arid areas of the Brazilian Northeast region assessed using mobile bags

Silva¹,

Lucena²,

Santiago³

et al. 2021

Revista Brasileira De Zootecnia

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The present study used mobile bags to estimate horse nutrient digestibility of tropical grasses found in semi-arid areas of the Brazilian Northeast region. Five female mixed-breed horses with a mean weight of 400±23 kg were assigned to a 5×5 Latin square design with five periods of seven days and five grasses: Tifton 85 hay (Cynodon spp.), sixweeks threeawn (Aristida adscensionis Linn.), Alexandergrass (Brachiaria plantaginea (Link) Hitchc), capim-de-raiz (Chloris orthonoton Doell), and Sabi grass (Urochloa mosambicensis). The nutrient content of forages was determined prior to inoculation in horses and after recovery of mobile bags from feces. The digestibility coefficients were determined from the difference between the inoculated and recovered material. The dry matter, organic matter, mineral matter, crude protein, neutral detergent fiber, and acid detergent fiber contents of the grass species were analyzed. Digestibility data were subjected to analysis of variance using the Statistical Analysis System (SAS, version 9.0) software. Higher dry matter digestibility coefficients were observed in Tifton 85 (74.61%), Alexandergrass (74.30%), and capim-de-raiz (68.88%) than in sixweeks threeawn (48.40%) and Sabi grass (52.89%). The highest crude protein digestibility coefficients were found for Alexandergrass (95.70%), Tifton 85 (93.50%), and sixweeks threeawn (93.35%). Sixweeks threeawn had lower apparent mineral matter digestibility than the other grasses. The digestibility coefficients of Alexandergrass and capim-de-raiz indicate that those grasses have potential to be used in equine feed.

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Brachiaria humidicola (Rendle) Schweick em diferentes idades de rebrota submetida a doses de nitrogênio e potássio

Cited by 8 publications

References 5 publications

<b>Regrowth age modifies the leaf anatomy of <i>Brachiaria</i> genotypes

<b>Regrowth age modifies the leaf anatomy of <i>Brachiaria</i> genotypes

Estudo metanalítico da resposta de gramíneas perenes de verão à adubação nitrogenada

Nutrient digestibility in horses of tropical grasses found in semi-arid areas of the Brazilian Northeast region assessed using mobile bags

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