Hipsometric, Volumetric and Growth Equations for Khaya ivorensis, Planted in Pirapora

ABSTRACT The present study aimed to provide hipsometric, volumetric and growth prediction equations for Khaya ivorensis species. To adjust the height equations we used data with total height and diameter at 1.3 meters collected in the city of Pirapora. For volumetric equations, we performed the scaling of 21 standing trees in the same planting. The growth equations were estimated with volume per hectare of 10 parcels, with age between 30 and 59 months. The volume calculation was performed following the method of Smalian. The adjusted equations showed satisfactory statistics, however lower than the other most widespread crops such as Eucalyptus. But in the face of the lack of technical information about the African Mahogany, this work has contributed significantly to the state of the art of the mentioned plant.摘要 本研究旨在为卡雅楝（Khaya ivorensis，又名非洲桃花心木）树种构建树高、材积及生长预测方程。为校正树高方程，本研究使用了在皮拉波拉市采集的总树高与1.3米处胸径数据。针对材积方程，我们对同一人工林内的21株活立木开展了材积测算工作。生长方程则基于10个林龄介于30至59个月的样地的每公顷蓄积量数据进行估算。材积计算采用斯马林（Smalian）法完成。经校正的方程统计学表现良好，但其精度仍低于桉树（Eucalyptus）等广泛栽培的树种。鉴于目前关于非洲桃花心木的技术资料较为匮乏，本研究可为该树种的现有技术研究水平带来显著贡献。