Paulo César de Melo

Crescimento de pitaia vermelha com adubação orgânica e granulado bioclástico

The objective of the study was to evaluate the growth of red pitaya (Hylocereus undatus) subjected to organic fertilization and calcified seaweed application. The experimental design was in randomized blocks with eight fertilization: control, cattle manure, chicken manure, calcified seaweed, cattle manure + chicken manure, cattle manure + calcified seaweed, chicken manure + calcified seaweed and cattle manure + chicken manure + calcified seaweed, applied every three months, with three replications and plot consisted of four plants. There were no significant differences in the length and in the number of central cladodes. There were significant differences in the number of side cladodes removed and in cladodes above the support. Fertilization with cattle manure + chicken manure + calcified seaweed favored the growth of red pitaya.

Production of seedlings of papaya tree using Bokashi and Lithothamnium

The work had the objective to evaluate the growth of papaya seedlings of the Solo group, under different doses of the natural fertilizers bokashi (fermented organic matter) and powderd sea algae (Lithothamnium sp). The substrate used was a mixture of soil, sand and organic compost (3:2:1, v/v). Treatments consisted of four doses of the bokashi fertilizer (0; 3; 6; 10%, v/v) and four doses of lithothamnium fertilizer (0; 3; 6; 10 g L-1), added to the substrate, before the filling of the bags. The experimental design used was completely randomized blocks, in a 4x4 factorial outline, with four repetitions and five plants per experimental plot. Evaluations were done at 15, 30, 60 and 100 days after seeding, which were: emergence (%), number of leaves, the shoot and the root length of the plant (cm), aerial, root and total dry matter weight (mg). There was significant interaction of the factors tested for the shoot length, at sixty and at hundred days after seeding; an isolated effect of the bokashi for all the analyzed variables, except for emergence, shoot length and number of leaves at thirty days after seeding. The conjugated use of the fertilizers showed a positive effect on precocity and plant height, and could be recommended in the formulation of substrate for the production of papaya seedlings.