Light levels influence on development and leaves reflectance index of imperial® zoysia grass / Influência de níveis de luz no desenvolvimento e índice de refletância das folhas de grama esmeralda imperial®

• Autor(a) principal: Pagliarini, Maximiliano Kawahata
• Data de Publicação: 2021
• Outros Autores: da Paz, Diego Oliveira, Trindade, Vanessa Dias Rezende, dos Santos, Patrick Luan Ferreira, de Castilho, Regina Maria Monteiro
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Revista Veras
• Texto Completo: https://ojs.brazilianjournals.com.br/ojs/index.php/BRJD/article/view/22688
• topic: Zoysia japonica; vibrant green; shading influence; grass.

The lawn aesthetics is one of the most important aspect, which professionals need to observe. Shading influence on grass development may be harmful to plant physiology, which will have its photosynthetic processes reduced. A grass that receives less light may etiolate, and, in popular terms, it can fade making it less attractive, since what is expected for a lawn is its vibrant green colour. Therefore, the research aimed to study the influence of luminosity levels and changes in light spectrum in development and leaf reflectance indices of Imperial® Zoysia Grass var.. Grass was implanted in black plastic containers filled with substrate formed by, soil, sand and soil conditioner. Luminosity levels tested were: T1: full sun, T2: 50% black shading net and T3: 50% red solar spectrum manipulation net. The lawn height was assessed using the prism methodology. Digital images were obtained and red, green and blue (RGB) mean values components were reported. RGB results were converted to HSB values (Hue, Saturation and Brightness). After obtaining HSB values, Dark Green Colour Index (DGCI) was calculated. Treatments T2 and T3 interfered in the development and reflectance index of leaves of Zoysia grass Imperial®. For Hue component the cited treatments turn leaves to yellow, which means leaves chloroses caused by the reduction of chlorophyll concentration. Dark Green Colour Index, T2 and T3 influenced in leaves coloration turning them yellowish, proving hue results, which is symptom of chlorosis and etiolation.