Height growth for assessing core–outerwood transition on Pinus sylvestris and Pinus nigra Spanish stands

  • Antonio RuanoEmail author
  • Ricardo Ruiz-Peinado
  • Juan Fernández-Golfín
  • Eva Hermoso
Original Paper


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.


Juvenile wood Corewood Accumulated height growth X-ray densitometry Scots pine Black pine 



This study has been carried out with the support of the Ministry of Economy and Competitivity of the Government of Spain through the Project RTA2014-00005-00-00, and the Training Program for Research Staff (FPI-INIA). We would like to thank to Enrique Garriga and Ramon García who helped on the field work, to Juan Carlos Cabrero who presented creative ways on how to proceed, to Eduardo Trobajo who did the micro-X-ray densitometry and to the carpenter Emilio Camacho who made the processing of the samples possible.


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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Timber Laboratory-Forest Products DepartmentNational Research Institute INIA-CIFORMadridSpain
  2. 2.Forestry EngineeringUniversidad de CórdobaCórdobaSpain
  3. 3.Department of Forestry and Forest Systems ManagementNational Research Institute INIA-CIFORMadridSpain

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