Biblioteca do Café
URI permanente desta comunidadehttps://thoth.dti.ufv.br/handle/123456789/1
Navegar
2 resultados
Resultados da Pesquisa
Item Development of coffee seedlings with biostimulants(Editora UFLA, 2021) Moreira, Wanderson Lopes; Ferraz-Almeida, RiselySustainable coffee production has become an alternative to aggregate value to coffee. Biostimulants are presented to increasing coffee quality and production. This study aims to compare and evaluate the application of biostimulants in the initial development of coffee seedlings. An experiment was carried out with applications of biostimulants: (i) 4-indole-3-ylbutyric acid + gibberellic acid + cinetina, AIA+AG+C; (ii) foliar fertilizer + algae, F+A; (iii) vegetal extracts + gibberellic acid, EV+AA. After 94 days of applying the biostimulants, monitored the length of the aerial part (LAP), the number of leaves (NL), stem diameter, root biomass (pivoting, auxiliary and total). Results showed that the F+A promoted the greatest LAP, NL, and root biomass. AIA+AG+C showed similar performance as F+A in NL. There was a higher production of auxiliary roots with biostimulants impacting positively on plant paraments. Given the results, we concluded that biostimulants based on mixed foliar fertilizer + algae demonstrated to be a better alternative to increasing the devel opment of the aerial and root part of coffee seedlings.Item Rooting biostimulants for Coffea arabica L. cuttings(Editora UFLA, 2020) Azevedo, Harianna Paula Alves de; Carvalho, Alex Mendonça de; Vidal, Douglas Alves; Santos, Heloisa Oliveira dos; Doria, JoyceIn the rooting process of Arabica coffee cuttings, plant hormones are used for inducing root formation. However, synthetic molecules cannot be used to form organic seedlings. The objective of this work was to evaluate the effect Cyperus haspan extract and different concentrations and types of humic substances on Arabica coffee cuttings. Arabica coffee shoots were collected, and cuttings containing at least two buds were taken. The experiment had a three-factor design, 2 (presence or absence Cyperus haspan extract) x 2 (humic or fulvic acid) x 4 (0, 10, 25 and 50 mg dm-³ concentrations). The following vegetative data were evaluated: shoot height (cm), survival, remaining leaves, leaf pairs, vigor, number of shoots,root length, area root, volume root, diameter root and fresh and dry mass were also evaluated. The enzyme activity of H+-ATPase, catalase, superoxide dismutase, alcohol dehydrogenase and esterase was also quantified. The results showed that the Arabica coffee cutting rooting rate was increased when treated with humic acid at a concentration of 10 mg dm-³ in the presence of Cyperus haspan extract. The lowest oxidative stress was observed in the 10 mg.dm-³ humic and fulvic acid treatments, regardless of the use of the extract.