Multiplication of the olive tree through grafting, cutting and indolbutyric acid / MultiplicaÃÃo da Oliveira AtravÃs da Enxertia, Estaquia e Ãcido IndilbutÃrico

AUTOR(ES)
DATA DE PUBLICAÇÃO

2007

RESUMO

O main method of propagating the olive tree is cutting. The success of this method depends upon a number of factors, such as: phenologic status of the stock plant, time of collecting the cuttings in addition to the hormonal treatment and packing site for rooting. Thus, to improve the efficiency of the olive tree propagation by rooting of semi-woody cuttings, two experiments were conducted at Agricultural Research Enterprise of Maria da FÃ, Empresa de Pesquisa AgropecuÃria de Maria da FÃ (EPAMIG). The first to obtain information on the formation of a clonal garden and the second to evaluate the rooting of semi-woody rooting collected in it. The first experiment was conducted in the randomized block statistic design in a design factorial scheme 2 X 2 X 3 with five replicates, comprehending two varieties (Arbequina e Ascolano), two methods of obtaining seedlings (grafting and cutting) and three doses of fertilized formulated 20-5-20 (100, 150 and 200 g plant-1). In this experiment, the evaluations performed were average length of branches, total and accumulated green mass, yield in number of cuttings, height of plants and trunk diameter. The second experiment, set up in a misting chamber with the purpose of obtaining rooted cuttings, prepared from branches collected in the first experiment, that is, from plants with a juvenile character and vegetative vigor. A completely randomized design with four replicates in a factorial scheme 4 X 14 was set up, namely, 4 doses of IBA (1,000 mg.L-1, 2000 mg.L-1, 3000 mg.L-1 and 4000 mg.L-1), and fourteen, that is, 12 treatments resulting from the first experiment (factorial 2 x 2 x 3) with further two treatments corresponding to cuttings prepared from adult plants of the two varieties (Ascolano and Arbequina). The percentage of cuttings rooted and/or with calluses, average number of roots and length of roots were evaluated. In the first experiment, it was found that variety Ascolano presented improved performance to the investigated variables, and that regardless of the doses of fertilizer and variety, plants presented greater length of branches when propagated through grafting. In the second experiment, the cuttings prepared from branches of variety Ascolano presented better responses for the variables studied. Cuttings prepared from cutting-propagated plants and submitted to the dosage of 100 grams of fertilizer showed better rooting.

ASSUNTO(S)

fitotecnia olea europaea,propagaÃÃo,enraizamento olea europaea,propagation,rooting

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