EFICIÊNCIA DA PROPAGAÇÃO VEGETATIVA DE CAJÁ-DE-JABUTI SOB DOSES DE ÁCIDO INDOLBUTÍRICO E MÉTODOS DE ENXERTIA

Dheimy da Silva Novelli; Gabriela da Silva Tamwing; Sebastião Elviro de Araújo Neto; Luis Gustavo de Souza e Souza; Nilciléia Mendes da Silva

doi:10.1590/1983-21252021v34n207rc

Authors

Dheimy da Silva Novelli Instituto Federal de Rondônia, Cacoal, RO https://orcid.org/0000-0001-5888-9058
Gabriela da Silva Tamwing Agrarian Sciences Department, Universidade Federal do Acre, Rio Branco, AC https://orcid.org/0000-0002-4692-7237
Sebastião Elviro de Araújo Neto Agrarian Sciences Department, Universidade Federal do Acre, Rio Branco, AC https://orcid.org/0000-0002-1212-4989
Luis Gustavo de Souza e Souza Agrarian Sciences Department, Universidade Federal do Acre, Rio Branco, AC https://orcid.org/0000-0001-8855-5163
Nilciléia Mendes da Silva Agrarian Sciences Department, Universidade Federal do Acre, Rio Branco, AC https://orcid.org/0000-0002-1484-3717

DOI:

https://doi.org/10.1590/1983-21252021v34n207rc

Keywords:

Spondias testudinis. Asexual propagation. Rooting. Cutting. IBA.

Abstract

The objectives of the tests were to evaluate concentrations of indolebutyric acid (IBA) combined with different types of cuttings and grafting methods on the vegetative propagation of cajazeira-de-jabuti (S. testudinis). The experiment with stem cuttings was conducted in a greenhouse with an intermittent misting system. The experimental design was completely randomized in a 5 x 6 factorial arrangement consisting of five cutting types: apical, medial, basal, stratified, and tanchan, and six IBA concentrations: 0, 1,000, 2,000, 3,000, 4,000, and 5,000 mg kg^-1, with four replications of ten cuttings. The experiment with the root cuttings followed a randomized block design composed of six IBA concentrations (0, 1,000, 2,000, 3,000, 4,000, and 5,000 mg kg^-1) with four replications, evaluating after 120 days the percentages of live, sprouted, rooted, and calloused cuttings, and the number and dry mass of roots and sprouts. Five grafting methods (chip budding, shield budding, cleft grafting, wedge grafting, and splice grafting) were tested by evaluating the graft success and sprouting percentages at 30 and 60 days after grafting, respectively. Statistical analyses were performed using the Kruskal-Wallis non-parametric test. The IBA concentrations of 0, 2,000, 3,000, and 5,000 mg kg^-1 increased the number of sprouts in tanchan cuttings. The tanchan cuttings showed the highest survival and percentage of sprouts regardless of the IBA concentration. The IBA concentration of 2,200 mg kg^-1 promotes higher rooting rates in root cuttings. Splice grafting provides higher graft success and sprouting rates.

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