Crescimento e teor de pigmentos de Paspalum notatum em resposta a aplicação de herbicidas

Barbosa, Aneli M.; Meschede, Dana Kátia; Alves, Guilherme Augusto Cito; Freiria, Gustavo Henrique; Furlan, Felipe Favoretto; Alves, Lucimara Aparecida; Junco, Michele Cristina

doi:10.7824/rbh.v16i2.520

Cited by 7 publications

(6 citation statements)

References 11 publications

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“…The lowest value was obtained by soil (100%) (479.19 μg g -1 MF) and was statistically equal only to medium sand (100%) ( Table 2). Barbosa et al (2017) evaluating the concentration of pigments in an ornamental grass of Bahiagrass (Paspalum notatum), observed a average value of 2000 μg g -1 MF, very high when compared to the present work, possibly because they are of different species. Rodrigues et al (2006), working with physiological analyzes of five cultivars of Cynodon found a range of 2132 to 2812 μg g -1 MF, results higher than those found in the present study.…”

Section: Resultsmentioning

confidence: 74%

Substratos no desenvolvimento de gramado esportivo “Tifton 419"

Santos

Castilho

2018

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Bermuda grass are the most widely used today in high performance sports fields, the cultivar “Tifton 419” is widely indicated for installation in these areas, however, there is no official a recommendation in the literature of the best substrate for the implantation of this species, and research is needed to meet this demand. In this way, the objective of this study was to evaluate the influence of substrates in the development of the “Tifton 419” sporting lawn. The experiment was conducted in field with grass carpets implanted in black plastic containers (volume 8.46 L), in a completely randomized design with five substrates and 12 replicates, with treatments: soil (100%), medium sand (100%), soil (50%) + medium sand (50%), soil (33%) + medium sand (33%) + organic compost (33%) and medium sand (50%) + organic compost (50%). Macro and microporosity, total porosity, density, chlorophyll content (a + b) and fresh and dry leaf mass were evaluated. The results showed that there was influence of the substrate on the development of the turfgrass, with the medium sand (50%) + organic compost (50%) presenting greater increases of fresh and dry mass (1.09 and 0.44 kg m-2), which may lead to higher maintenance costs of the cut, and soil (33%) + medium sand (33%) + organic compost (33%) presented good results of the analyzes performed, being the one recommended for the development of the cultivar “Tifton 419” in sports fields.

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Section: Resultsmentioning

confidence: 74%

Substratos no desenvolvimento de gramado esportivo “Tifton 419"

Santos

Castilho

2018

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“…(Fry, 1991) and lower height of Bahia grass with the dose of 246 g ha -1 of a.i. (Barbosa et al, 2017).…”

Section: Resultsmentioning

confidence: 99%

“…Leaf Chlorophyll Index (LCI) of Esmeralda grass, in five evaluations, as a function of nitrogen fertilization and glyphosate doses Means followed by the same letter in the column do not differ by Tukey's test at p ≤ 0.05; Equations: (1) Y = 24.4 -0.0049**X (R 2 = 0.99) and (2) Y = 23.2 -0.0028**X (R 2 = 0.97); ns and ** -Not significant and significant at p ≤ 0.01 by F test, respectively; N via leaf: 1% urea in a 200 L ha -1 spray, corresponding to 0.09 g m -2 N Means followed by the same letter in the column do not differ by Tukey's test at p ≤ 0.05; Equation: (1) Y = 3.51 -0.0017**X (R 2 = 0.78); ns and ** -Not significant and significant at p ≤ 0.01 by F test, respectively; N via leaf: 1% urea in a 200 L ha -1 spray, corresponding to 0.09 g m -2 N Table 3. Quantity of N, P and K accumulated by the leaves of Esmeralda grass as a function of nitrogen fertilization, considering the sum of the five evaluations The effects of glyphosate application as growth regulator have been reported in lawns, such as the reductions of dry matter production in Bahia grass (Barbosa et al, 2017), of 22% in the height of the Centipede grass (Fry, 1991) and in the height and dry matter of Esmeralda grass (Dinalli et al, 2015). This reduction implies less removal of leaves in the cutting operation and, consequently, less export of nutrients.…”

Section: Resultsmentioning

confidence: 99%

“…Glyphosate as a growth regulator promoted lower height of rice plants (Gitti et al, 2011), lower growth of sugarcane (Leite & Crusciol, 2008;Silva et al, 2009;Meschede et al, 2010) and lower dry matter production in Paspalum notatum (Barbosa et al, 2017); however, in lawns, doses above a certain limit can cause damage and even death (Kaufmann, 1985). Dinalli et al (2015) concluded that 200 g ha -1 of the a.i.…”

Section: Introductionmentioning

confidence: 99%

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Nitrogen fertilization and glyphosate doses as growth regulators in Esmeralda grass

Gazola

Buzetti

Gazola

et al. 2019

Rev. bras. eng. agríc. ambient.

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Despite maintaining the green color in turfgrasses, nitrogen (N) fertilization affects shoot growth and, consequently, the frequency of cuts, the main factor in the costs of turfgrass maintenance. Therefore, this study aimed to evaluate N fertilization and the use of glyphosate as a growth regulator in Esmeralda grass (Zoysia japonica Steud.). The experiment was conducted in the field, from August 2014 to July 2015, using a randomized block design in a 5 x 4 factorial scheme with four repetitions and 20 treatments, namely: control (without N), 15 g m-2 of N in soil without foliar N; 30 g m-2 of N in soil without foliar N; 15 g m-2 of N in soil with foliar N (1% urea in 200 L ha-1) and 30 g m-2 of N in soil with foliar N combined with glyphosate doses (0, 200, 400 and 600 g ha-1 active ingredient (a.i.)). The N doses were split into five applications along the year. The following variables were evaluated: height, leaf chlorophyll index and foliar accumulation of nitrogen, phosphorus and potassium. Fertilization with 15 g m-2 of N in soil without foliar N application, split into five times along the year, was adequate for the turfgrass, while foliar fertilization did not promote benefits. The glyphosate dose of 400 g ha-1 a.i. was effective in reducing the growth of Esmeralda grass, without compromising its color and promoted less N, P and K accumulation in the leaves, reducing the height and dry matter production.

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“…Studies on Brazilian conditions for growth control in Bahiagrass have been published in recent years (Marchi et al, 2016;Marchi et al, 2017;Barbosa et al, 2017;Dias et al, 2019), however none of them use Paclobutrazol as a growth regulator. In this context, the objective of the present study was to evaluate the use of Paclobutrazol doses as growth regulators in Bahiagrass.…”

Section: Introductionmentioning

confidence: 99%

Paclobutrazol as growth regulator in Bahiagrass

et al. 2020

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Bahiagrass (Paspalum notatum) is a native species widely found on highways margins, however, cutting practices are necessary, which increase the maintenance cost, being an alternative, the use of growth regulators, such as Paclobutrazol. Thus, the objective of the present study was to evaluate the use of Paclobutrazol doses as growth regulator in Bahiagrass. The turf was implanted in black plastic containers (8.46 L), previously prepared with the mixture of soil + sand + organic compost (1:1:1). The experimental design was completely randomized, composed of 3 doses of Paclobutrazol [1.1 and 2.2 kg a.i. (active ingredient) ha-1 + control (0 kg a.i. ha-1)], in four applications of 2 L of syrup per container, thus forming a factorial 3x4 (doses x response time) with 3 repetitions. The fresh and dry mass, relative chlorophyll index, leaf N and the visual aspect of the green cover rate were evaluated on four different dates. It was observed that the product controlled the growth of the lawn, with less production of fresh and dry mass, and increase of the relative index of chlorophyll and concentration of leaf nitrogen; however, it decreased turfgrass density of green mass, which influenced the visual lawn aspect. Thus, Paclobutrazol controlled Bahiagrass growth at a dose of 2.2 Kg a.i. ha-1 in regular applications of 30 to 45 days, however it affected the density and consequently the aesthetics of the turfgrass.

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Crescimento e teor de pigmentos de Paspalum notatum em resposta a aplicação de herbicidas

Cited by 7 publications

References 11 publications

Substratos no desenvolvimento de gramado esportivo “Tifton 419"

Substratos no desenvolvimento de gramado esportivo “Tifton 419"

Nitrogen fertilization and glyphosate doses as growth regulators in Esmeralda grass

Paclobutrazol as growth regulator in Bahiagrass

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