One of the characteristics of great relevance in the wood quality in Spanish coniferous forests due to growth conditions is the presence of corewood. This wood area presents properties and characteristics inferior to those in outerwood, which are more appropriate for certain uses. In plantations with short rotations, the percentage of juvenile timber is higher, and the profitability of the wood can be affected due to its unsuitability for high added value applications, such as structural. This work focuses on determining whether the use of models of current annual increase in height can provide suitable estimations of the year or transition zone between corewood and outerwood. This knowledge will contribute to analyze the expected yield of quality wood. The material studied is from Pinus sylvestris L. (Scots pine) and Pinus nigra Arnold subsp. nigra (black pine) pure stands. Densitometry results showed that the corewood–outerwood transition year could not be predicted by tree height functions.

中文翻译：

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用于评估樟子松和黑松西班牙林分芯-外材过渡的高度增长

由于生长条件，与西班牙针叶林木材质量密切相关的特征之一是芯材的存在。该木材区域的特性和特性不如外材，更适合某些用途。在轮伐期较短的人工林中，幼材的百分比较高，并且由于其不适用于结构等高附加值应用，木材的盈利能力会受到影响。这项工作的重点是确定使用当前每年高度增加的模型是否可以提供对年份或芯材和外材之间的过渡区的合适估计。这些知识将有助于分析优质木材的预期产量。研究的材料来自 Pinus sylvestris L.（苏格兰松）和 Pinus nigra Arnold subsp。nigra (黑松) 纯净的立场。密度测定结果表明，不能通过树高函数预测芯材-外材过渡年。