Fluxo de tecido foliar em azevém anual manejado sob três intensidades de pastejo

Confortin, Anna Carolina Cerato; Quadros, Fernando Luíz Ferreira de; Rocha, Marta Gomes da; Kuinchtner, Bruno Castro; Glienke, Carine Lisete; Camargo, Daniele Gindri; Machado, Juliana Medianeira

doi:10.1590/s0103-84782009005000072

Cited by 5 publications

(7 citation statements)

References 8 publications

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“…To understand the effects of different types of management strategies on pasture dynamics and evolution, knowledge of the growth, intake, and senescence of forage species is fundamental. Thus, determination of these parameters through biomass flow technique is fundamental for the understanding of pasture ecophysiology (CONFORTIN et al, 2009).…”

Section: Introductionmentioning

confidence: 99%

“…While comparing methods (rotational and continuous) and two grazing intensities (low and moderate), CAUDURO et al (2007) verified that rotational stocking and low intensity favored growth flow and in continuous stocking with low defoliation intensity, the senescence rate was increased. In a study on ryegrass managed under three forage disappearance intensities, CONFORTIN et al (2009) observed that in grazing, the 43.3% disappearance intensity of pre-grazing forage mass allowed a greater flow of leaf blades intake, with intermediate growth and senescence flows. SILVA et al (2015), observed that when ryegrass is managed under different stocking rates, the leaf biomass flow is not altered.…”

Section: Introductionmentioning

confidence: 99%

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Effect of herbage allowances on biomass flows in Italian ryegrass

et al. 2019

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The objective of this study was to determine the leaf tissue flows in Italian ryegrass (Lolium multiflorum Lam.), in different phenological stages, grazed by lambs, and managed under three herbage allowances (6, 9 and 12 kg DM/100 kg body weight under rotational stocking method. The experimental design was completely randomized, with repeated measures arrangement. Forage allowances determined similar growth and intake flows, actual and potential utilization efficiencies of grass and they were different in the phenological stages of Italian ryegrass. The intake of leaf blade, as a percentage of body weight, was higher in the 12% herbage allowance. Considering leaf tissue flows, Italian ryegrass can be managed in forage allowances that vary between 6 and 12 kg DM/100 kg body weight.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of herbage allowances on biomass flows in Italian ryegrass

et al. 2019

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“…has been extensively studied due to its importance for livestock production systems in southern Brazil (CONFORTIN et al, 2010(CONFORTIN et al, , 2013BANDINELLI, 2005), and studies on biomass flows have been performed for both tropical (CUTRIM JUNIOR et al, 2013;LOPES et al, 2013) and temperate species such as ryegrass (CAUDURO et al, 2007;CONFORTIN et al, 2009;PONTES et al, 2004). However, no studies have been published on the flows of leaf biomass at high stocking rates as a result of intake of different supplements by cattle.…”

Section: Introductionmentioning

confidence: 99%

Biomass flows and defoliation pattern of ryegrass grazed by supplemented heifers

Stivanin

Rocha

Pötter

et al. 2017

SCA

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ResumoPara definir estrategicamente a melhor taxa de lotação para o azevém é importante conhecer em detalhe o processo de crescimento dessa forrageira. O estudo foi realizado para avaliar os fluxos de biomassa foliar, a intensidade e a frequência de desfolhação de azevém (Lolium multiflorum Lam), pastejado por bezerras exclusivamente em pastejo, ou em pastejo e recebendo grão de milho ou de aveia como suplemento. O delineamento experimental foi inteiramente casualizado com medidas repetidas no tempo, três sistemas alimentares e três repetições de área. Os fluxos (kg de MS de lâminas foliares ha -1 dia -1 ) de crescimento (40,6), senescência (40,7) e consumo (29,7) foram similares nos diferentes sistemas alimentares. O consumo de lâminas foliares em relação ao peso corporal foi menor quando as bezerras receberam suplemento, independente do tipo de grão. Os sistemas alimentares testados não influenciaram nas eficiências real e potencial de utilização bem como no balanço liquido de utilização do azevém. O fluxo de consumo das laminas foliares 1,4 vezes mais baixo que o fluxo de crescimento ocasionou em eficiência real de utilização inferior a um (0,7) e o fluxo de senescência mais alto que o fluxo de crescimento das lâminas foliares gerou uma eficiência potencial de utilização negativa (-0,2). As lâminas foliares foram desfolhadas com intensidade similar (54,4%) nos diferentes sistemas alimentares. A frequência de desfolhação do azevém aumentou quando as bezerras foram suplementadas. O aumento de 29,2% na taxa de lotação ocasionado pelo uso do grão de milho ou do grão de aveia como suplemento não alterou a dinâmica dos fluxos de biomassa do azevém, porém reduziu o consumo de lâminas foliares em relação ao peso corporal das bezerras e ocasionou alterações na frequência de desfolhação do azevém. Palavras-chave: Balanço liquido. Consumo de lâminas foliares. Eficiência potencial de utilização. Grão de aveia. Grão de milho. AbstractTo strategically define the best stocking rate management strategy for ryegrass, it is important to know the growth process of forage plants in detail. The study was conducted to analyze the leaf biomass flows and the defoliation intensity and frequency of Italian ryegrass (Lolium multiflorum Lam) grazed by heifers fed exclusively on pasture or on pasture and supplemented with corn or white oat grain. The experimental design was completely randomized following a repeated measures arrangement with three feeding systems and three area replications. Biomass flows (kg DM leaf blades ha 1 day 1 ) for leaf growth (40.6), leaf senescence (40.7), and leaf intake (29.7) were similar in the different feeding systems. Leaf blade intake adjusted to body weight was lower in supplemented heifers regardless of grain type. Actual and potential utilization efficiencies and ryegrass biomass net balance were not affected by feeding system. The leaf intake flow was 1.4 times lower than the growth flow, resulting in an actual utilization efficiency less than one (0.7), whereas the senescence flow was higher than ...

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“…is the most studied temperate species, with studies in several research areas (ROMAN et al, 2007; Acta Scientiarum. Animal Sciences Maringá, v. 36, n. 3, p. 279-283, July-Sept., 2014 CONFORTIN et al, 2009;ROSO et al, 2009;ROSA et al, 2013). Tiller dynamics is extensively studied with tropical species (DIFANTE et al, 2008;FIALHO et al, 2012;ZANINE et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

<b>Tiller dynamics of ryegrass managed under two stocking rates

Stivanin

Rocha

Pötter

et al. 2014

Acta Sci. Anim. Sci.

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This study investigated the tiller dynamics of Italian ryegrass (Lolium multiflorum Lam) under low and high stocking rates. These rates were determined by heifers exclusively on pasture or grazing and supplemented with oats and corn grain. The experimental design was completely randomized with repeated measurements over time, with two stocking rates, three and six replications of area for low and high stocking rates, respectively. The appearance rate (1.0 tillers tiller-1 m-2), survival rate (0.8 tillers tiller-1 m-2), population stability index (1.6) and site occupation (0.3) were similar for high and low stocking rates. The tiller density was similar for different stocking rates. The first generation of tillers was 56% of the tiller population at end of the ryegrass cycle. The increase by 22.5% in the stocking rate derived from the use of supplements for grazing heifers did not alter the tiller dynamics of ryegrass.

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Fluxo de tecido foliar em azevém anual manejado sob três intensidades de pastejo

Cited by 5 publications

References 8 publications

Effect of herbage allowances on biomass flows in Italian ryegrass

Effect of herbage allowances on biomass flows in Italian ryegrass

Biomass flows and defoliation pattern of ryegrass grazed by supplemented heifers

<b>Tiller dynamics of ryegrass managed under two stocking rates

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