Tillering dynamics of digit grass subjected to different defoliation frequencies

Sousa, Bráulio Maia de Lana; Rizato, César Augusto; Fagundes, Jaílson Lara; Fontes, Pryanka Thuyra Nascimento; Backes, Alfredo Acosta; Júnior, Luiz Fernando Ganassali de Oliveira; Cruz, Natan Teles; Nascimento, Carlos Souza do

doi:10.1590/s1678-3921.pab2019.v54.00668

Cited by 15 publications

(20 citation statements)

References 20 publications

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“…Understanding the plant dynamics through the study of morphogenetic and structural characteristics that take place the period of establishment makes it possible to ensure pasture longevity, productivity and sustainability over the years (Sousa et al, 2019). The present study was thus undertaken to examine the establishment of five Brachiaria cultivars in the soil-climatic conditions of the Brazilian semi-arid region.…”

Section: Introductionmentioning

confidence: 99%

Establishment of Brachiaria cultivars in the soil-climatic conditions of the Brazilian semi-arid region

Rodrigues

Difante

Gurgel

et al. 2020

Acta Sci. Anim. Sci.

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This study aimed was the establishment of the genus Brachiaria in the Brazilian semi-arid region. The experiment was conducted from April to June 2016, as a randomized-block experimental design with five treatments and four replicates. Treatments were represented by five Brachiaria cultivars, namely, Marandu, Paiaguás, Piatã, Xaraés and Basilisk. Morphogenetic (leaf appearance rate, leaf elongation rate e stem elongation rate) and structural characteristics (final leaf length, tiller population density e number of leaves per tiller, forage mass, leaf blade mass, stem mass, senescent material mass and leaf:stem ratio) of the forage cultivars were evaluated. Canopy height fitted a linear regression model (P<0,05), with estimated daily increases of 0.50, 0.53, 0.53, 0.54 and 0.56 cm for cvs Basilisk, Marandu, Paiaguás, Piatã and Xaraés, respectively. The number of live leaves in cvs Basilisk and Paiaguás increased linearly (p < 0.05), by 4.3 and 2.8 leaves per tiller, respectively, during the 60-day period. The recommended height at which the growth of Brachiaria cultivars should be interrupted is upon reaching 25 to 35 cm. In the soil-climatic conditions of the Brazilian semi-arid region, the Brachiaria cultivars Basilisk, Marandu, Paiaguás, Piatã and Xaraés are established at 75 days after sowing, which is the recommended time for performing the first harvest or lenient grazing to stimulate tillering.

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Section: Introductionmentioning

confidence: 99%

Establishment of Brachiaria cultivars in the soil-climatic conditions of the Brazilian semi-arid region

Rodrigues

Difante

Gurgel

et al. 2020

Acta Sci. Anim. Sci.

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“…The highest stem mass was observed in the months that comprised the ewes' gestation phases, with higher values for height also occurring in that period resulting in greater competition for light between the tillers. In this condition, the plant prioritizes carbon allocation in the internode elongation to position the new leaf area in the less shaded layers of the canopy (Sousa et al, 2019) which resulted in an increase in stem mass.…”

Section: Resultsmentioning

confidence: 99%

Supplementation of lamb ewes with different protein sources in deferred marandu palisadegrass (Brachiaria brizantha cv. marandu) pasture

Gurgel

Difante

Neto

et al. 2020

Arq. Bras. Med. Vet. Zootec.

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The objective of this study was to evaluate the effect of different protein sources on the performance of lamb ewes and their offspring supplemented in deferred pasture. The treatments were the different protein sources: soybean meal, cotton cake, babassu cake and coconut cake. The ewes were weighed and evaluated for their body condition score during the gestation, parturition and weaning phases. The lambs were weighed at birth and at weaning. The structural variables and chemical composition of the pasture were evaluated during the usage period. Grass height and forage mass were higher when the ewes were in the gestation and weaning stages. The leaf mass was not altered during the pasture usage with a mean value of 566.1kg ha-1 DM. The highest levels of crude protein in the leaf blade were observed during the parturition and weaning phases. The body weight of the ewes did not differ between the sources with averages 45.0, 39.9 and 36.6kg for the gestation, parturition and weaning phases, respectively. Weights at birth and at weaning had an effect from protein sources, with the highest values observed in the lambs of ewes who received soybean meal and babassu cake supplementation. The lambs of ewes supplemented with soybean had higher average daily gain and total gain. Babassu, coconut and cotton cakes can replace soybean meal in supplementation of ewes in deferred pasture.

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“…Maior TAP normalmente resulta em maior TMP (Difante et al, 2008) como um mecanismo compensatório para manutenção do balanço de perfilhos considerando a disponibilidade de água e luz (Matthew et al, 2000). A maior TAP e TMP (ou menor TSP nesse caso) também há uma maior renovação de tecidos, levando a uma população mais jovem de perfilhos, podendo então gerar ganhos qualitativos (Sousa et al, 2019).…”

Section: Discussionunclassified

EFEITOS DA INTERCEPTAÇÃO LUMINOSA OU PERÍODO DE DESCANSO FIXO NO ACÚMULO DE FORRAGEM E ESTRUTURA DO DOSSEL DE UMA ANTIGA CULTIVAR DE Megathyrsus maximus

Amorim¹,

Lopes²,

Moreira³

et al. 2020

Rev. Cien. Agr.

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<p>Objetivou-se com esse trabalho avaliar os efeitos frequência de colheita de pastos de Megathyrsus maximus cv. sempre-verde na estrutura, dinâmica do perfilhamento, período de descanso e ciclos de colheita. Foram avaliados três tratamentos, caracterizados por frequências de colheita, sendo elas: a de períodos fixos de 28 dias, sempre que dossel interceptasse 90% ou 95% da luz incidente, seguindo delineamento inteiramente casualizado com quatro repetições. Houve efeito das frequências de colheita na altura do dossel, índice de área foliar e interceptação luminosa tanto na pré-colheita quanto pós-colheita. A taxa de aparecimento de perfilhos foi maior nos pastos manejados a 90% de interceptação luminosa do que quando manejados a períodos fixos de 28 dias. Efeito inverso foi observado na taxa de sobrevivência de perfilhos, em que os pastos manejados a períodos de 28 dias apresentaram maior média do que aqueles a 90% de interceptação luminosa. Maior número de ciclos de colheita e menor período de descanso foram observados na frequência de 90% de interceptação luminosa e menores no período fixo de descanso. Não houve influência das frequências na massa de forragem, porcentagem de colmo vivo, forragem morta, acúmulo de forragem e taxa de acúmulo de forragem. Observou-se efeito das frequências apenas na porcentagem de lâminas foliares, em que a frequência de 90% de interceptação luminosa apresentou o maior valor médio. A correlação entre a interceptação luminosa ou índice de área foliar com a altura do dossel apresentou-se forte e positiva. A utilização da frequência de colheita variável é mais efetiva em controlar a estrutura do dossel que a fixa, além de proporcionar foragem de composição morfológica mais adequada ao consumo animal e perfil mais jovem da população de perfilhos. O capim sempre-verde pode ter sua rebrotação interrompida quando o dossel atingir entre 80-85 cm de altura e o pastejo encerrado quando atingir 50 cm.</p>

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Tillering dynamics of digit grass subjected to different defoliation frequencies

Cited by 15 publications

References 20 publications

Establishment of Brachiaria cultivars in the soil-climatic conditions of the Brazilian semi-arid region

Establishment of Brachiaria cultivars in the soil-climatic conditions of the Brazilian semi-arid region

Supplementation of lamb ewes with different protein sources in deferred marandu palisadegrass (Brachiaria brizantha cv. marandu) pasture

EFEITOS DA INTERCEPTAÇÃO LUMINOSA OU PERÍODO DE DESCANSO FIXO NO ACÚMULO DE FORRAGEM E ESTRUTURA DO DOSSEL DE UMA ANTIGA CULTIVAR DE Megathyrsus maximus

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