&lt;b&gt;Defoliation patterns and tillering dynamics in Italian ryegrass under different herbage allowances

Graminho, Larissa Arnhold; Rocha, Marta Gomes da; Pötter, Luciana; Rosa, Alexandre Pires; Bergoli, Tuani Lopes; Machado, Marcela

doi:10.4025/actascianimsci.v36i4.24021

Cited by 3 publications

(1 citation statement)

References 11 publications

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“…Considering this, Graminho et al (2014) recorded an increase in the accumulation of stalks as a function of perennial ryegrass plant maturity, which is a result of the change in photo-assimilate partitioning, contributing to the increase in tiller mortality. Furthermore, the transition from the vegetative phase to the reproductive phase (flowering), also contributes to the increase in dead forage because the growth of leaves becomes limited by the decreased supply of photoassimilates for developing leaf tissue (Irving, 2015).…”

Section: Carbon and Nitrogen Fluxesmentioning

confidence: 98%

Fluxos energéticos e reservas orgânicas de plantas forrageiras

Cruz

Jardim²,

Sousa³

et al. 2022

RSD

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Objetivou-se com esta revisão abordar os fluxos de energia existentes no ecossistema de pastagem, bem como o uso de reservas orgânicas por gramíneas forrageiras. A energia radiante é absorvida pelas folhas e transformada em energia química pela qual o carbono assimilado é fixado. Durante o processo de assimilação e fixação do C são realizados processos fotoquímicos e bioquímicos, que são influenciados pela presença de luz. Muitos fatores ambientais podem influenciar a capacidade das plantas em responder à estímulos sofridos. Neste sentido, fluxos energéticos dentro do sistema de pastagem estão em constante movimento para manutenção da planta forrageira. A direção do fluxo energético varia com o ambiente de crescimento da planta forrageira, uma vez que além de afetar as caraterísticas estruturais, o fator ambiente exerce controle sobre o sistema radicular. Em tese, as reservas orgânicas localizadas em raízes e colmos exercem papel crucial no crescimento de plantas pastejadas, principalmente nos primeiros dias após a desfolhação. Portanto, é importante incentivar pesquisas que envolvam os órgãos de reservas e seus padrões de acúmulo para que os resultados possam auxiliar no desenvolvimento de sistemas de pastejo sustentáveis.

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Section: Carbon and Nitrogen Fluxesmentioning

confidence: 98%

Fluxos energéticos e reservas orgânicas de plantas forrageiras

Cruz

Jardim²,

Sousa³

et al. 2022

RSD

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Morphogenic, structural characteristics and population stability index of ryegrass tillers submitted to stocking methods

Dotto

Rocha

Vicente

et al. 2022

Arq. Bras. Med. Vet. Zootec.

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This study aimed to evaluate the morphogenic and structural characteristics and the population stability index of ryegrass (Lolium multiflorum Lam.) tillers when the pasture was submitted to two stocking methods during grazing cycles. The experimental design was a complete randomized block, with repeated measurements over time (n=6 cycles), two treatments (stocking methods) and three area replicates. In the continuous stocking method, the highest population density of tillers was observed. The highest tiller weight occurred in the rotational stocking method. The morphogenic variables and the other structural variables were not altered by the stocking methods and showed differences during the grazing cycles. The tiller population stability index was similar in the two pasture management strategies, and both can be used for ryegrass management considering this parameter.

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Production of annual ryegrass with different doses of nitrogen fertilization in topdressing

Bolke

Haygert-Velho

Timm

et al. 2019

SCA

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The objective of this study was to assess the growth of annual ryegrass (Lolium multiflorum) cv. BRS Ponteio with different doses of nitrogen applied in the pasture, thereby adjusting their growth to the exponential growth model. A randomized block design was used with five nitrogen application rates (0, 150, 250, 350, and 450 kg N ha-1) and four replicates, applied in installments. Each plot measured 9 m2. On April 15, 2014, 25 kg ha-1 of viable pure seeds of annual ryegrass were sown at a depth of 0.02 m, in 18 rows spaced at 0.17 m in each plot. Growth in the control treatment (zero nitrogen) pasture lasted 167 days with only three cuts, whereas in pastures treated with 350 and 450 kg N ha-1, growth was extended for an additional 45 days with a 333% increase in the number of cuts. The pastures were used for the same duration (188 days) in the treatments with 150 and 250 kg N ha-1, however, increased nitrogen resulted in two additional cuts and a shorter time interval between cuts. The time interval between each cut and the degree-days interacted dynamically causing distinct growth. Growth of the annual ryegrass BRS Ponteio without nitrogen application is poor and cannot be represented even by a first order linear model. The application of nitrogen topdressing, in the form of urea, decreases the time interval between cuts, increases the dry matter production per hectare, stimulates this production, and follows the exponential growth model.

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<b>Defoliation patterns and tillering dynamics in Italian ryegrass under different herbage allowances

Cited by 3 publications

References 11 publications

Fluxos energéticos e reservas orgânicas de plantas forrageiras

Fluxos energéticos e reservas orgânicas de plantas forrageiras

Morphogenic, structural characteristics and population stability index of ryegrass tillers submitted to stocking methods

Production of annual ryegrass with different doses of nitrogen fertilization in topdressing

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