Efeito de bioestimulante composto de cinetina, ácido indolbutírico e ácido giberélico em epífitas, visando a restauração florestal

Abstract

-(Effect of the biostimulant compounded of kinetin, butyric acid, and gibberellic acid on epiphytes for forest restoration). The present study evaluated the effect of biostimulant (Cytokinin as kinetin 0.009%, Gibberellic acid 0.005%, and Indole-3-butyric acid 0.005%) on the development of three epiphyte species aiming their introduction on forest restoration management. Concentrations of 0, 4, 8, and 12 mL L -1 of bioestimulant Stimulate ® were applied by leaf spray on Vriesea carinata Wawra (Bromeliaceae), Oncidium flexuosum Sims (Orchidaceae), and Rhipsalis paradoxa (Salm-Dyck ex Pfeiff.) Salm-Dyck (Cactaceae). Branches of Chorisia speciosa were used as phorophyte to support the plants. The parameters quality of anchorage, number of leaves, shoots, and roots, and dry matter of the roots and shoots were analyzed. The experimental design was a randomized complete block with four treatments, three replications with five plants each, totalizing 15 plants per treatment for each species. Data were submitted to variance analysis and regression. The treatments 4 and 8 mL L -1 of biostimulant improved the number of leaves and plant diameter of V. carinata. The other parameters were not significant for the three species in all treatments evaluated. The bioestimulant on the experimental conditions had no significant responses on growth and development of roots and anchorage quality for the species, with stimulus of shoots growth on V. carinata and O. flexuosum. The growth stimulus of the shoot and the easy, fast, and low cost of the application of biostimulant, enable its use to optimize the transplanting of epiphytic plants for forest restoration. Keywords: Atlantic Rain Forest, epiphytic, Stimulate RESUMO -(Efeito de bioestimulante composto de cinetina, ácido indolbutírico e ácido giberélico em epífitas, visando a restauração florestal). Com objetivo de introdução de epífitas em manejo de restauração florestal, foi avaliado o efeito da aplicação de bioestimulante no desenvolvimento de três espécies epífitas sob condição de arboreto. Plantas das espécies Vriesea carinata Wawra (Bromeliaceae), Oncidium flexuosum Sims (Orchidaceae) e Rhipsalis paradoxa (Salm-Dyck ex Pfeiff.) Salm-Dyck (Cactaceae) foram pulverizadas, com o bioestimulante Stimulate ® nas concentrações de 0,0, 4,0, 8,0 e 12,0 mL L -1 . Estacas de Chorisia speciosa foram utilizadas como suporte e substrato para a fixação das plantas. As variáveis analisadas foram: qualidade da fixação, número de folhas, brotos e raízes e, matéria seca da parte aérea e raízes. O delineamento experimental foi em blocos ao acaso constituído de quatro tratamentos (concentrações do bioestimulante) com três repetições de cinco plantas, totalizando 15 plantas por tratamento, para cada espécie. Os dados foram submetidos à análise de variância e regressão. Os tratamentos 4 e 8 mL L -1 de bioestimulante proporcionou aumento da produção de folhas e do diâmetro do caule de V. carinata, enquanto que as demais variáveis analisadas, nas três espécies, não apresentaram diferenças s...

Agronomic performance of Marandu grass treated with plant growth biostimulants in the Amazon biome

“…The observed increase in the forage mass accumulation rate with doses higher than 1.8kg/ha BIOST.A can therefore be attributed to stimulation by the sprayed auxin. Previous studies evaluating the effects of exogenous auxin sources on other plant species also observed increased productivity (Cato, 2006;Silva et al, 2010;Silva et al, 2013b andLunelli et al, 2015).…”

“…Because their use recommendations are aimed at fruit and vegetable crops (Castro & Vieira, 2001;Cato, 2006;Silva et al2013a;Silva et al, 2013b;Lunelli et al, 2015), a lack of knowledge exists about the biostimulation effects of these products on tropical forage plants. In this context, plant biostimulants are therefore a promising alternative for forage production since, as with other crops, they could have beneficial effects on forage plants by stimulating forage mass production per unit of area, decreasing rest periods, and/or improving plant responses to fertilization.…”

Simultaneous relocation strategy of bromeliads as epiphytes or terricolous in the Montane Dense Ombrophilous Forest of Parque Estadual da Cantareira, São Paulo State, Brazil.

“…Relocation -The plants of A. distichantha and W. cyathiformis utilized for the relocation showed an average of 19.61 and 13.65 leaves, respectively, and showed a good phytosanitary condition. The relocation was carried out in November 2015, during the highest rainfall period, as recommended by Lunelli et al (2015). For the relocation of bromeliads as epiphytes, plants were fixed on trees on their pitchforks or trunks regardless of the species, as also reported by Jasper et al (2005).…”

“…The factors associated with the individual morphological characteristics, which have probably determined the survival percentages, should also be considered since both species were in good phytosanitary conditions during their maintenance in the nursery. Lunelli et al (2015) observed that epiphytes have diverse responses when transplanted and recommend studying the species' biology to monitoring relocation.…”