PÓ DE ROCHA E USO DE RECIPIENTE ALTERNATIVO NA PRODUÇÃO DE MUDAS DE IPÊ ROXO Handroanthus impetiginosus (Mart. ex DC.) Mattos

Abstract

The experiment was carried out at the Instituto Federal Goiano - Advanced Campus of Hidrolândia-GO, between the months of September 2017 to April 2018, in a nursery environment covered with 50% dark mesh in the light delay. The experimental design was completely randomized (DIC), with twelve treatments and four repetitions, in a factorial scheme (2 x 5 + 1), with two containers: line tube (TL) and the tube (TB) five doses of powder. rock from mica schist rock (D1: 1; D2: 5; D3: 10; D4: 15 and D5: 20 g / L of soil) and a control of 0 g / L of rock dust soil. Each treatment has 6 composite experimental units, totaling 288 total experimental units. At 139 days after transplanting the seedlings, allometric variables were collected, such as: plant height, number of leaves, stem diameter, length of the root system, weight of fresh and dry matter of the aerial part and roots. The data were subjected to analysis of variance and the means compared by the F test at the level of 5% significance, using software R. The neck diameter (DC) variable was influenced (P <0.05) in the PMX 1g / L dose within the line tube factor. For the number of leaves, the dose 0 g / L and 1 g / L showed a greater leaf increment for the tube container. The PMX doses at plant height (AP) were not significant, however, in the tube container the variable AP was higher (P <0.05). The PMX doses did not influence the root length (CR), however, its length was longer in the line tube container (P <0.05). The root dry matter (MSR) was not influenced by the PMX doses, however, the tube container showed significance for this variable (P <0.05). The dry matter of the aerial part (MSPA) in the doses of 5g / L and 10 g / L of PMX, presented significance for the tube container (P <0.05). We conclude that the PMX doses were higher by 1 g / L in the neck diameter, for the number of leaves the doses of 0 and 1 g / L and the doses of 5 and 10 g / L for the dry matter variable of the aerial part. The use of the tube container provided better results in the production of H. impetiginosus seedlings, however the seedlings produced in the line tube are lower in qualitative terms.