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.

中文翻译：

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Schizolobium parahyba var. 幼木的特性。亚马逊（paricá）在不同的种植制度下

Schizolobium parahyba var. amazonicum (paricá) 在亚马逊的农林业系统中栽培时表现出良好的造林性能。然而，这种栽培系统对木材特性的影响是未知的。本研究的目的是了解栽培系统对 paricá 木材的解剖特征以及物理和机械特性的影响。本研究中使用的材料来自巴西帕拉州西南部地区的一项实验。处理包括与大豆（Glycine max）联合的paricá农林业系统（AFS），第一年，第二年玉米（Zea mays）和仅与研究物种的单一栽培。我们的结果表明处理之间土壤化学属性的显着差异：与单一栽培系统的土壤相比，AFS 中的土壤显示出更高水平的磷 (P)、钙 (C) 和铜 (Cu)。AFS 中生产的木材与单一栽培系统有显着不同：木材密度和抗压性与 AFS 中较低的纤维平行。此外，AFS 对木材的某些解剖特征具有显着的统计影响。发现血管腔的切向直径和射线频率的值更高。木材特性的变化主要与 AFS 土壤中高浓度的磷有关，这会影响树木的生长速度和形成层的活动。AFS 中生产的木材与单一栽培系统有显着不同：木材密度和抗压性与 AFS 中较低的纤维平行。此外，AFS 对木材的某些解剖特征具有显着的统计影响。发现血管腔的切向直径和射线频率的值更高。木材特性的变化主要与 AFS 土壤中高浓度的磷有关，这会影响树木的生长速度和形成层的活动。AFS 中生产的木材与单一栽培系统有显着不同：木材密度和抗压性与 AFS 中较低的纤维平行。此外，AFS 对木材的某些解剖特征具有显着的统计影响。发现血管腔的切向直径和射线频率的值更高。木材特性的变化主要与 AFS 土壤中高浓度的磷有关，这会影响树木的生长速度和形成层的活动。