Desenvolvimento de grama-esmeralda, grama-bermudas 'Tifway 419' e 'Celebration' submetidas a aplicação de reguladores de crescimento

• Ano de defesa: 2015
• Autor(a) principal: Zanon, Maurício Ercoli [UNESP]
• Tipo de documento: Tese
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Estadual Paulista (Unesp)
• Palavras-chave em Português: Gramados; Gramínea; Crescimento (Plantas); Plantas - Reguladores; Produtos químicos agrícolas; Lawns
• Link de acesso: http://hdl.handle.net/11449/136722; http://www.athena.biblioteca.unesp.br/exlibris/bd/cathedra/22-03-2016/000859912.pdf

The implementation and management of sports fields is among the agricultural activities of high technology. The ornamental point of view, the lawns are one of the most important landscape components. Its constant maintenance becomes an expensive operation and often mowing operations can offer the risk of accidents. Therefore, it is very important to search for alternatives for reducing the frequency of mowing and one of them is the use of growth regulators. Thus, this study had as objective to evaluate the efficiency of doses of growth regulators, Paclobutrazol and trinexapac-ethyl on the vegetative growth of zoysiagrass (Zoysia japonica), bermudasgrass 'Tifway 419' (Cynodon dactylon x Cynodon transvaalensis) and bermudasgrass 'Celebration' (Cynodon dactylon) under field conditions as an alternative to traditional management performed through cuts weekly. The experiment was conducted in a commercial production area of grass located in the Fazenda São José, municipality of Jardinópolis / SP, in the period from October to December 2013. The experimental design was a randomized block; there were eight treatments (control 1: no pruning; witness 2: pruning weekly, three Paclobutrazol doses: 70, 140 and 280 g ha-1; three trinexapac-ethyl: 100, 200 and 400 g ha-1). It was performed a single application of the product and the irrigation was conducted followed the technique used in the company which allocated the area for this experiment. Ratings were made at 15, 30, 45 and 60 days after application being evaluated height (cm); dry mass of shoots; dark green color index (ICVE) and quality (notes). It was found that the Paclobutrazol at the dosages tested, was not effective to suppress the zoysiagrass growth and did not affect the quality of the lawn.On the contrary, trinexapac-ethyl was effective in suppressing growth of this grass, mainly in the dose of 400 g ai ha-1, which showed a decrease in growth efficiency up to 45 days ...