Talhadia de Eremanthus erythropappus (DC.) MacLeish: fator crítico de sucesso para o manejo sustentável

Abstract

The objective in this study was to evaluate a populating the native tree species Eremanthus erythropappus (DC.) MacLeish (candeia), in a Coppice System, using the scarification manual technique of the soil with roots exposure on the strains surrounding.The area is 0.3916 ha and is located inBaependi – MG municipality, with the average altitude is 1.165m and Cwb climate (altitude tropical).The first cycle was harvested in a shallow cut system at 7.8 years old, and conducted in Simple Coppice System.The applied treatments varied according to the time for the soil scarification surrounding the strains, at 5, 6, 7 and 8 weeks after finishing the tree cutting.The scarifications were made with hoes in circular format with 80 cm of radius, at approximately a 5 cm depth, exclusively around the strains of the harvested trees.In the first months,the shoots of adventitious buds of roots inside and outside the crowns have been observed.The area remained surrounded and, until the third year, it was performed a manual harvest with sickle to eliminate the grass-competition.No thinning and also any type of fertilizer was applied, soil corrective of pesticide.Six years after we performed the treatments, four plots per treatment measuring 5 x 10 m with an area of 50 m² were launched.A forest inventory was taken and measured DBH (diameter at breast height), plants height and CAS (circumference at soil height) of the strains.All the elements were georeferenced. We also collected soil samples and send them to analyses.Soil scarification with root exposition surrounding the candeia strain can be done up to eight weeks after the tree is felled, during the rainy season.The planting area of candeia harvested at 7.8 years of age and carried out in the Simple Coppice System, by means of adventitious shoots of the candeiaroots, in six years showed a density of established plants 216% higher than that of high-forest.Candeia Simple Coppice System without thinning produced, at 6 years, only 2.68% of the commercial volume obtained inseedlings planting at 7.8 years of age, when using the legal criteria for cutting authorization, which indicates the need for settlement management.The density correlations and basal area of regenerating plants with the strains basal area showed the candeiadensity planting is a factor that can influence the regenerating amount in the Coppice System.There is no spatial association between strains and candeiasregenerating, thus there is complete spatial randomness.