Avaliação de crescimento inicial de espécies nativas em plantio misto de restauração florestal em Dois Vizinhos, PR

Abstract

There is little information about the performance of species that can be used in restoration projects. The planting of tree seedlings in total area using a combination of successional groups is a way to recover the ecosystem to restoring the functioning of forest dynamics. Among the models of tree planting stands out the most recent method of filling and diversity lines. This study in the Federal Technological University of Paraná, Campus Dois Vizinhos, Brazil, evaluated the initial development of planting 70 regional tree species. The planting was done in the model of diversity and fill lines (3 x 2 m) in an area of 0.86ha. The variables studied were: survival, height, diameter at ground level and crown area. It is observed that most of the species obtained survival high (between 80% and 100%), and the leading cause of species with low survival was mainly due to frost, low temperatures or other causes. Alchornea triplinervia (Spreng) Müll. Arg. e Piptadenia gonoacantha (Mart.) J.F. Macbr. were not among the ten fastest growing species, which was not expected, because these species belong to the group of species to fill. Albizia polycephala (Benth.) Killip, Sebastiania commersoniana (Baill.) L.B. Sm. & Downs, Parapiptadenia rigida (Benth.) Brenan e Peltophorum dubium (Spreng.) Taub. were among the top ten species in ranking high, demonstrating its potential role in growth may exert a kind of filling. In variable diameter at ground height, stood out Solanum mauritianum Scop., Schinus terebinthifolius Raddi, Trema micrantha (L.) Blume, Ceiba speciosa (A. St.-Hil.) Ravenna , Credela fissilis Vell. , Butia capitata (Mart.) Becc., Mimosa scabrella Benth., Guazuma ulmifolia Lam. e Croton urucurana Baill. The species with the lowest DAS were Aspidosperma polyneuron Müll. Arg., Myrciaria trunciflora O. Berg, Maytenus aquifolia Mart., Myrcianthes pungens (O.Berg) D. Legrand e Zanthoxylum rhoifolium Lam. The species with greatest canopy were: Solanum mauritianum Scop.,, Trema micranta (L.) Blume, Croton urucurana Baill e Schinus terebenthifolius Raddi. Solanum mauritianum was the species that excelled in all variables, obtaining an excellent performance for restoration, there is still that this species is attractive to wildlife, has high natural regeneration and large pantry area acting as an excellent tree coverage. Croton urucurana Baill. , Trema micranta (L.) Blume, Schinus terebinthifolius Raddi e Mimosa scabrella Benth. also stood out as a species fill. For species diversity stood out Sebastiania commersoniana (Baill.) L.B. Sm. & Downs, Xylosma sp. G. Forst., Parapiptadenia rigida (Benth.) Brenan e Peltophorum dubium (Spreng.) Taub.