SEEDLING PRODUCTION OF TREE SPECIES INOCULATED mycorrhizal FOR THE REHABILITATION ACT OF AREAS IMPACTED BY EXTRACTION OF CLAY

Abstract

ABSTRACT: The activity of clay extraction implicates in the retreat of the natural vegetation and intense soil movement, generating in some cases considerable holes that contribute to the disturbance of the area, besides promoting with the retreat of the nutrients, high toxicity of metals in the soil. Due to the need of the recovery of the impacted ecosystems, this work has as objective the production and distribution of native arboreal seedlings inoculated with Arbuscular Mycorrhizal Fungi (AMF), rehabilitation of these areas. 9717 seedlings of arboreal and fruitful forest species were produced inoculated with mushrooms micorrízicos, being chosen in agreement with a meticulous study of the occurrence of the vegetation before existent in the area. Among them they are: açaí açaí (Euterpe oleracea), leucena (Leucaena spp), jataí (Hymenaea stilhocarga Hayne), thrush (Mimosa caesalpiniaefolia), acerola (Malpighia glabra L.), piqui (Caryocar brasiliense Cambess), sumaúma (Ceiba pentandra (L.) Gaertn.), ingá (Inga spp.) and purple ipê (Tabebuia impetiginosa). After having sowed in plastic sacks and tubetes with a mixture of ravine soil, vermiculita and bovine manure, the seedlings were inoculated with coming FMAs of the cultivation trap with Brachiaria brizantha the vegetation home. The germination tax varied in agreement with the species, and 210 days after the germination were taken to field 1621 seedlings between December 23, 2009 and January 19, 2011. The survival tax in the field, in the different areas, varied in agreement with the species and chemical and physical quality of the soils, and in all of the areas the survival tax was superior to the 90%.   KEY-WORDS: clay exploration, recovery, mycorrhizae.