Paulo Sergio Koga

SEEDLING PRODUCTION OF FRUIT AND ORNAMENTAL SPECIES TO THE USE OF WEED HORMONE (Cyperus rotundus)

Currently, the great demand for fruit and ornamental plants have generated the need for production of healthy and vigorous seedlings. Some plants, such as purple nutsedge (Cyperus rotundus) produce hormones that can induce rooting cuttings, allowing its spread. The objective was to evaluate the spread of jabuticaba (Myrciaria cauliflora), guava (Psidium guajava) and mini ecsoria (Ixoria coccinea) by cuttings, evaluating the effect of concentrations of butyric acid (IBA) and extracts of tubers of purple nutsedge (Cyperus rotundus) in these species. Two experiments were conducted. The first experiment was conducted in a completely randomized design with a factorial 2 x 2 x 5, involving two species (guava and jabuticaba), two treatments (IBA and aqueous extract of purple nutsedge) with five concentrations of both treatments (25, 50, 75 and 100%) with five replicates. The second experiment also included in experimental design, involving mini ecsoria factorial scheme 5 x 2 x 2 with 2 treatments (IBA and aqueous extract of C. rotundus), five concentrations of both treatments (25, 50, 75 and 100%) and two conditions (controlled environment and natural environment), with five replicates. Both treatments with IBA or nutsedge, showed positive results on the number of shoots on the cuttings. For mini ecsoria, we observed similar results to the first experiment, with larger amounts of sprouts in a natural environment.

Initial development of biotopes of Senna occidentalis as a function of acidity and vegetation cover on soil

The objective of this work was to determine the influence of different saturations of basis of soil and vegetation on the initial development of Senna occidentalis, using seeds of different regions of the state of Mato Grosso. Two experiments were carried out. In the first, it was assessed the germination and initial development of the Senna occidentalis weed from cities of Alta Floresta, Juara and Nova Canaa do Norte, sown in soil with four base saturations in soils of (32, 63, 77 and 94 %). The increase in base saturation has improved the development of Senna occidentalis. In the second experiment, it was studied the initial development of Senna occidentalis, based on the presence of straw on the substrate, using a completely randomized design in 2 x 3 x 4 factorial scheme in two locations (Alta Floresta and Juara), three types of mulch (brachiaria grass, rice and maize) and four sowing depths (0, 2, 4, and 8 cm). The rice straw as well as the greater depths, reduced the emergence of seedlings of Senna occidentalis.