Influence of climatic variables in the development of Mimosa scabrella and Schinus terebinthifolia in post-mining recovery in the South of Brazil

Abstract

The influence of precipitation and temperature on the development of the species M. scabrella and S. terebinthifolia in a post-mining gravel reclamation area in the municipality of Otacílio Costa, SC. The species were planted in eight Anderson cores randomly distributed throughout the area in conjunction with other species. In each nucleus, one individual of M. scabrella and two individuals of S. terebinthifolia were planted. Survival, diameter, lap height and total height were evaluated, and the increments of individuals and related to climatic variables were calculated using the Pearson Correlation Test (p < 0.05). The data from the Monthly assessments were subjected to ANOVA (p < 0,05). The chemical analysis of the soil was also performed. The individuals of M. scabrella and S. terebinthifolia obtained 75% and 100% survival, respectively. A significant positive correlation was observed between the diametric increment and the precipitation of both species. M. scabrella had greater development in diameter and height, and the highest average increment sat in June, the period When there was greater rainfall. S. terebinthifolia showed good development in July, the driest month during the period evaluated. The species presented potential for recovery of areas degraded by gravel mining, however, it is suggested that new increment evaluations be carried out for a longer period of time.