Abstract

PRAUSE, J.; FERNANDEZ LOPEZ, C.  and  GALLARDO LANCHO, J. F.. Influence of soil properties on the growth of Schinopsis balansae Engler in the Humid Parque Chaqueño (Argentina). Quebracho (Santiago del Estero) [online]. 2021, vol.29, n.1, pp.5-14.  Epub Sep 01, 2021. ISSN 0328-0543.

Schinopsis balansae (quebracho colorado chaqueño) is a dominant species, characteristic of the humid Chaco (Argentina) where the quality of the soil is often low, primarily due to physical limitations (poor drainage), i.e., where only tree species of high rusticity can colonize. The objective of the study was to analyze the edaphic properties that may influence the growth and development of reforestation using quebracho (S. balansae) in the Argentine humid Chaco ecoregion. For this purpose, four sites forested with plantations of the same age (years 10-12), similar distance (4 x 4 m.) and health status of S. balansae were selected. In each site, twelve individuals were measured at their diameter at height of chest (DAP) and trunk length (H), and its soil sampled at 0 to - 10; -10 to - 25; -25 to - 55; and - 55 to - 115 cm depth. The following parameters were measured: texture; bulk density (Da); capillary porosity (Pmc); pH; electrical conductivity (CE); soil organic matter (MOS); exchangeable Ca2+, K+ and Na+; and (RAS) sodium adsorption ratio. It is concluded that the edaphic properties conditioning the growth and development of afforestations with quebracho colorado chaqueño are salinity (positively, related to electrical conductivity) and texture (negatively, excess of clay) that would affect the installation and growth of the quebracho colorado chaqueño; even though, concerning depth, an increase in de RAS is preferred, though keeping a moderate salinity.

Keywords : edaphic properties; afforestations; quebracho colorado chaqueño.

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