Exploring the forestry potential of two legume species with contrasting ecological strategies in a seasonally dry tropical region
Ranieri Ribeiro, Paula | Guillemot, Joannès | Macedo Delarmelina, William | de Souza, Paulo Henrique | de Moraes, Caio Rodrigues | Favoreto Campanharo, Ítalo | Mendes, Lucas José | Ocheuze Trivelin, Paulo César | Hollunder Klippel, Valéria | Trazzi, Paulo André | Winckler Caldeira, Marcos Vinicius
Growing plantations with native trees is crucial for ecosystem restoration and wood and non-wood product supply, but silvicultural guidelines are lacking. The growth, survival, biomass allocation, nutrient accumulation and nutrient use efficiency, 13C isotopic composition, canopy openness, and solar radiation in understory and grass cover were assessed in monoculture plantations of fast [Schizolobium parahyba var. amazonicum (Huber & Ducke) Barneby], and slow [Anadenanthera peregrina var. peregrina (L.) Speg.] growing species in the Brazilian Atlantic Forest. Nine experimental plots per species and a stand density of 1111 trees ha−1 were examined 6 years after planting. The mean values of wood density were higher in A. peregrina than S. parahyba trees, with 0.66 g cm−3 and 0.27 g cm−3, respectively. S. parahyba trees showed 75% higher stem-wood biomass, with five times less leaf biomass than A. peregrina trees. However, contrasting diameter growth and survival rates resulted in comparable stand above-ground biomass between species. Macronutrient content and δ13C composition differences showed that S. parahyba exhibits higher nutrient use while A. peregrina has higher intrinsic water efficiency. Grass was abundant in the S. parahyba plantations and suppressed in the A. peregrina plantations, in line with the observed canopy openness and solar radiation in the understory. Functional traits allow the prediction of the contrasting silvicultural potentials of A. peregrina (wood production and microclimate recovery) and S. parahyba (timber production and agroforestry).
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