Resumo

SANCHEZ-CARDENAS, Saray et al. Effect of inoculation of seeds from Leucaena leucocephala (Lam) de Witt cv. Cunningham with IHPLUS ^® BF at the nursery stage. Pastos y Forrajes [online]. 2023, vol.46  Epub 22-Dez-2023. ISSN 2078-8452.

Objective: To evaluate the effect of inoculation of seeds from Leucaena leucocephala (Lam) de Witt cv. Cunningham with the biofertilizer IHPLUS® BF on seedling growth, development and vigor during the nursery stage.

Materials and Methods: The study was conducted in polyethylene bags with a substrate of soil and organic matter. Five seeds/bag and 10 bags/treatment were used in a complete randomized design. The treatments were formed by the combination of two factors: A) imbibition time and B) dilutions of IHPLUS® BF). Three different times were combined: A) 8, 10 and 28 hours with four dilutions, B) 2,5; 5; 10 and 15 ml L-1) and a control with seeds with heat treatment, thermal scarification and water at 80 ºC for two minutes. Emergence and days to emergence, plant height, stem length, stem diameter, number of leaves and root length were evaluated in each treatment. The quality index classification was used to evaluate the morphological attributes of L. leucocephala seedlings.

Results: The combination of seeds with thermal scarification and 28 hours of imbibition in 2,5% IHPLUS® BF resulted in 100 % seedling emergence/day, as well as higher emergence rate. There were significant differences among treatments in plant height, stem length and stem diameter (p ≤ 0,05). The combination of the thermal scarification method with the bioproduct IHPLUS® BF (2,5 %) showed better results, with values of 116,4 cm, 83 cm and 6,26 mm in height, length and stem diameter, respectively.

Conclusions: In freshly harvested seeds of L. leucocephala cv. Cunningham, the combined use of the thermal scarification method, with 28 hours of imbibition in a solution of IHPLUS® BF at a concentration of 2,5 favored the germination and seedling emergence processes in nursery.This allowed an additive effect that was evidenced in the stimulation of growth and vegetative development of this plant.

Palavras-chave : growth; emergence; seedlings.

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