Stump regrowth and estimation of reconstituting Caatinga shrub-tree biomass under forest management

Abstract

ResumoObjetivou-se avaliar a rebrota e reconstituir a biomassa arbustiva-arbórea a partir das cepas em uma área de Caatinga sob manejo florestal em Floresta-PE, Brasil. Dois anos após intervenção em 18 parcelas foram medidas as circunferências e alturas das cepas e dos perfilhos. Foi avaliada a influência do diâmetro e da altura da cepa na brotação das espécies. Em uma área próxima e sem intervenção, foram tomados dados de diâmetro a altura da base e do peito para reconstituição da biomassa explorada. Verificou-se que Poincianella bracteosa e Aspidosperma pyrifolium emitiram maior número de perfilhos nas cepas com circunferência maior que 30 cm, mas sem influência da altura da cepa. A biomassa média estimada (17186,16 kg ha -1 ) foi similar a áreas submetidas à intervenção antrópica e a sua reconstituição pode ser uma ferramenta auxiliar na para órgãos ambientais na fiscalização de desmatamento ilegal. Palavras-chave: corte raso, regeneração natural, semiárido AbstractThis study aimed to evaluate stump regrowth and estimate the reconstitution of shrub-tree biomass from the stumps in an area of Caatinga under forest management in Floresta-PE, Brazil. The circumferences and heights of the stump and sprouts were measured two years after an intervention on 18 plots. The influence of the stump diameter and its height on the sprouting ability of the species was evaluated. Data was taken in the next area without intervention in order to estimate the diameter at breast height for reconstitution of the exploited biomass. We found that the tillering for Poincianella bracteosa and Aspidosperma pyrifolium was influenced by the size of the circumference, but not by the stump height. The average estimated biomass (17186.16 kg ha -1 ) was similar to other areas also subject to human intervention, and its reconstitution can be an auxiliary tool for monitoring illegal deforestation by environmental agencies.

Restoration potential of eight tree species from a seasonally dry tropical forest in southeast Piauí, Brazil

“…The number of sprouts per stump was considered high, with an average of 17.5 sprouts/stump. These results are in conformity with those reported by Lima et al (2018), who found a 63.4% sprouting capacity in a Caatinga vegetation located in Pernambuco state, two years after clearcutting. The number of sprouts per stump reported by the previous authors was 5.7, significantly lower than we found, probably due to the longer period after cutting (two years versus six months).…”