Estrutura E Produtividade De Capim-Tanzânia Submetido a Diferentes Frequências De Desfolhação

Macedo, Vitor Hugo Maués; Cunha, Antônio Marcos Quadros; Cândido, Ebson Pereira; Domingues, Felipe Nogueira; Melo, Deyvid de Menezes; Rêgo, Aníbal Coutinho do

doi:10.1590/1089-6891v18e-38984

Cited by 10 publications

(11 citation statements)

References 15 publications

(22 reference statements)

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“…Increasing cutting frequencies resulted in increased height (ALT) and sheath length of the Massai grass; in a previous study, an increasing cutting frequency triggered the elongation of the stem, with the production of new leaves at the top of the canopy (MACEDO et al, 2017).…”

Section: Resultsmentioning

confidence: 85%

Megathyrsus Maximus cv. Massai submetido a frequências de corte

Sousa

Alexandrino

Santos

et al. 2019

SCA

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We evaluated the growth dynamics and forage production of Massai grass subjected to different cutting frequencies during the rainy season, with the aim to determine the most suitable cutting frequency to increase grass productivity. A randomized block design with four treatments (four cutting frequencies, 24, 32, 48, and 96 days) was used. The morphological characteristics were evaluated weekly in seven random tillers. Leaf appearance rate, phyllochron value, foliar elongation rate, leaf senescence rate, and stem elongation rate were influenced (p < 0.05) by the cutting frequency, while no effect was found for leaf life span. The number of live leaves per tiller, mean length of leaf blades, population density of tillers (DPP), and sheath length were influenced by the cutting frequency, along with plant height, dry mass of harvested leaf blade, dry mass of harvested stem, dry mass of harvested dead material, and leaf/stem ratio, while there was no effect on dry mass of forage harvested. The rates of leaf blade accumulation, stem accumulation, forage loss, and forage production were not affected by cutting frequency. A cutting frequency of 24 days resulted in the highest productivity values of Massai grass during the rainy season.

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Section: Resultsmentioning

confidence: 85%

Megathyrsus Maximus cv. Massai submetido a frequências de corte

Sousa

Alexandrino

Santos

et al. 2019

SCA

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“…According to the variables associated with the productive characteristics of the pasture (Table 1), the use of a variable defoliation interval based on the interception of 95% of the photosynthetically active ration (PAR) by the canopy as the criterion for defining the moment to interrupt regrowth resulted in shorter defoliation intervals (P<0.001) and a consequent increase in the number of grazing cycles during the experimental period. This is closely related to the erect growth habit of this species, whose vertical architecture, despite increasing its height, will always enable the passage of radiation towards regions below the canopy (Macedo et al, 2017). (1) Standard error of the mean.…”

Section: Resultsmentioning

confidence: 99%

“…Furthermore, despite the observed lower herbage allowance (4.46% in relation to the fixed interval, which was 5.53% of the live weight), the adoption of a variable defoliation interval resulted in pastures with larger (P=0.04) proportions of leaf blade (Table 1). Although stem elongation is favorable to elevate DM production, it may negatively influence grazing efficiency and the nutritional value of the produced herbage, in addition to extending the leaf appearance interval; i.e., the phyllochron (Macedo et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

Pasture characteristics and productive performance of dairy cows under two grazing management strategies

Fernandes

Oliveira

Jordão

et al. 2020

SCA

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The objective of this work was to evaluate the supply, morphological and chemical composition of forage, performance and milk composition of crossbred cows managed in Megathyrsus maximus cv. Tanzania in intermittent grazing system with fixed and variable defoliation intervals according to the interception of 95% of photosynthetically active radiation by the canopy. The experimental design was a randomized complete block design with two treatments and two area replications. In each grazing cycle the supply, morphological composition, forage nutritive value, dry matter intake, milk production and composition were determined. The experimental area was 4.0 hectares, divided into two blocks of 2 hectares. Each block was subdivided into 22 pickets (11 for each treatment) totaling 44 pickets with an area of 909 m2 each. Significant differences (P < 0.05) were observed for leaf blade content, in vitro digestibility of dry matter and forage crude protein, dry matter intake, individual and area milk production and lactose content milk, being the highest values found in the pastures managed with variable defoliation interval. Thus, the defoliation interval defined by the 95% interception of the photosynthetically luminosity leads to higher leaf blade proportions in the forage canopy, resulting in higher individual milk yield and per unit area, but with a loss of protein and total solids contents of milk.

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“…As well as for other tropical grass species, the taller the mowing, the more foliar area remains in plants and, therefore, more light interception and biomass production is expected after mowing (Dim et al, 2015;Macedo et al, 2017). Hence, the lowest levels of control when mowing is associated to chemical control are found when plants are mowed at 40 cm (Raimondi, 2018).…”

Section: Exp 1 Sourgrass Mowing Height Associated To Chemical Controlmentioning

confidence: 99%

Glyphosate-Resistant Sourgrass Management Programs Associating Mowing and Herbicides

et al. 2020

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Currently, sourgrass is one of the most important weeds in grain production areas in Brazil. The objective of this work was to evaluate the efficiency of associated systems composed by mowing and chemical control against clumped sourgrass. In the first experiment, different mowing heights (0, 5, 10, 15 and 20 cm), coupled with complementary applications of glyphosate + clethodim, were evaluated on sourgrass control. The second experiment was composed by programs starting with fallow mowing at different times, 50 (early), 35 (intermediate) and 20 (late) days before soybean sowing. After mowing, treatments were followed by herbicide applications according to the need until soybean harvest. The shorter the mowing height associated with herbicide application, the better the control of sourgrass. The weed management programs (anticipated, intermediate and late) were efficient on sourgrass control during fallow and along soybean cycle. Weed management programs starting with mowing provided better or similar control compared to systems that employed chemical control only, indicating that mowing can replace one of the herbicide applications.

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Estrutura E Produtividade De Capim-Tanzânia Submetido a Diferentes Frequências De Desfolhação

Cited by 10 publications

References 15 publications

Megathyrsus Maximus cv. Massai submetido a frequências de corte

Megathyrsus Maximus cv. Massai submetido a frequências de corte

Pasture characteristics and productive performance of dairy cows under two grazing management strategies

Glyphosate-Resistant Sourgrass Management Programs Associating Mowing and Herbicides

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