Uso de índices de reflectância das folhas para avaliar o nível de nitrogênio em grama-bermuda

Lima, Claudinei de Faculdade de Tecnologia de Ourinhos ) Paulo; Backes, Clarice; Fernandes, Dirceu Maximino; Santos, Alexandre Leme Godoy dos; Godoy, Leandro José Grava de; Bôas, Roberto Lyra Villas

doi:10.1590/s0103-84782012005000062

Cited by 16 publications

(22 citation statements)

References 11 publications

(9 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The chlorophyll content of a sports turfgrass is important due to its aesthetic aspect, that is, it must have good density and intense green coloration (LIMA et al, 2012). According to Godoy et al (2012), chlorophylls are responsible for this green tonality in plants, and the higher the concentration in leaf contents, the more intense the color of a grass.…”

Section: Resultsmentioning

confidence: 99%

Substratos no desenvolvimento de gramado esportivo “Tifton 419"

Santos

Castilho

2018

View full text Add to dashboard Cite

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.

show abstract

Section: Resultsmentioning

confidence: 99%

Substratos no desenvolvimento de gramado esportivo “Tifton 419"

Santos

Castilho

2018

View full text Add to dashboard Cite

show abstract

“…Lawn studies indicate hue results ranging from 60 to 120º, where closer to 120º the lawn is greener intense, while closer to 60º more yellow (Backes et al, 2010;Lima et al, 2012;Gazola et al, 2016). These values are related to grass nutrition, as in adequate fertilization program lawn has an intense green colour and a yellowish-green when deficient .…”

Section: Resultsmentioning

confidence: 98%

“…As each of three primary colours (RGB) may have values from 0 to 255 (256 probable results), the combination of them results in 16,777,216 of possible colours (Lima et al, 2012), with each component stands out in greater result depends on the main primary colour. In the present study, among RGB results, green showed higher values, followed by blue and lastly red, thus indicating that lawn is more bluish-green in colour, regardless of sludge dose used.…”

Section: Resultsmentioning

confidence: 99%

Sewage sludge composted in the coloring and development of Bermuda grass

et al. 2020

View full text Add to dashboard Cite

‘Barazur’ or DiscoveryTM (Cynodon dactylon) is a new variety of Bermuda grass that has slow vertical growth and a bluish-green colour, and the use of sewage sludge in implantation of this species may be an alternative for its sustainable cultivation, without need for chemical fertilizers. Thus, the objective was to evaluate the influence of sewage sludge compound on colour and development of Bermuda grass DiscoveryTM. The experiment was conducted in the field with sod implanted in black plastic containers (volume 8.46 L) filled with soil + sand (1:1) and added different dosages of sludge compost, being: 0 g L -1 (control), 30 g L-1, 60 g L-1 and 120 g L-1. Digital image analysis, fresh and dry leaf mass, Nitrogen leaf and Nitrogen leaf accumulation were evaluated. It was observed that the sewage sludge influenced on turfgrass colouring and development, where 30 g L-1 showed excellent results for colouring with less mass production and N accumulation than the highest dose, showing that this treatment is sufficient for lawn development, without the need of using higher concentrations of compound. It is concluded that the use of composted sewage sludge at a dose of 30 g L-1 is recommended for use in implantation of Bermuda grass DiscoveryTM.

show abstract

“…Although the dark green color index is proved to be influenced by the increase of nitrogen absorption by plants [20,33] no significant difference was observed between the control treatment (T1) and the treatment with an increase in the content of nitrogen in the soil (T4) as shown in Table 2. Also, the significant response to potassic fertilization suggests that higher levels, above 351 mg.dm -3 (Treatment 5), may increase the development of L. indica.…”

Section: Vegetative Vigormentioning

confidence: 99%