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Properties of juvenile wood of Schizolobium parahyba var. amazonicum (paricá) under different cropping systems

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Abstract

Schizolobium parahyba var. amazonicum (paricá) has been demonstrating good silvicultural performance when cultivated in Agroforestry systems in the Amazon. However, the effects of this cultivation system on wood properties is unknown. The objectives of this research are to understand the effects of the cultivation system on the anatomical characteristics, and physical and mechanical properties of paricá wood. The material used in this study was obtained from an experiment in the southwest region of the state of Pará, Brazil. The treatments included an agroforestry system (AFS) of paricá in consortium with soy (Glycine max), in the first year, corn (Zea mays) in the second and a monoculture only with the studied species. Our results demonstrated significant differences in soil chemical attributes among treatments: the soil in the AFS showed higher levels of phosphorus (P), calcium (C) and copper (Cu) than the soil of the monoculture system. The wood produced in the AFS is significantly different in relation to the monoculture system: wood density and the resistance to compression parallel to fibers being lower in AFS. Furthermore, the AFS presented significant statistical effects on some anatomical characteristics of the wood. Higher values for tangential diameter of vessel lumina and for ray frequency were found. The alterations in wood properties were mainly related to the high concentration of phosphorus in the AFS soil, which can affect the tree growth rates and cambial activity.

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Acknowledgements

The authors are thankful to the Institutional Program of Scientific Initiation and Technological Development and Innovation of the State University of Pará (UEPA) and the National Council for Scientific and Technological Development (CNPq) for the grants and financial support provided during this study. We are also grateful to Bsc. Marta César Freire Silva, research assistant in the wood collection of the “Embrapa Amazônia Oriental”, for her excellent work with the vegetal microtechniques. This study was financed in part by the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior - Brasil (CAPES) - Finance Code 001.

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Correspondence to Luiz Eduardo de Lima Melo.

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da Silva, C.B.R., dos Santos Junior, J.A., Araújo, A.J.C. et al. Properties of juvenile wood of Schizolobium parahyba var. amazonicum (paricá) under different cropping systems. Agroforest Syst 94, 583–595 (2020). https://doi.org/10.1007/s10457-019-00422-3

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  • DOI: https://doi.org/10.1007/s10457-019-00422-3

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