Skip to main content

Advertisement

Log in

Modeling the height–diameter relationship and volume of young African mahoganies established in successional agroforestry systems in northeastern Brazil

  • Published:
New Forests Aims and scope Submit manuscript

Abstract

The aim of this study was to fit and select height–diameter and stem volume equations for two African mahogany species (Khaya ivorensis and Khaya anthotheca) in the initial development phase (between 2 and 5 years old), established in agroforestry systems in northeastern Brazil. We used linear and nonlinear models to predict the total height (h) and stem volume (v), based on data from forest inventories and stem measurements of standing trees. We tested the following hypotheses: (1) the simple linear model is the most accurate to estimate the total height of young African mahogany trees in relation to different types of height–diameter models (linearized, nonlinear and those with transformed variables); (2) simple and double-entry stem volume models have the same precision in estimating the individual volume of young African mahogany trees. The results showed that the simple linear height–diameter model was most accurate to estimate the height of both African mahogany species. The age’s effect (young trees) and probably the predominantly monopodial development of the Khaya spp. trees sampled were discussed as the causes of the linear nature of the models that best described the height–diameter relationship. The stem volume equations for Khaya ivorensis and Khaya anthotheca were well adjusted. However, the double-entry Spurr’s model was more accurate than the other models for both species. Furthermore, for the Khaya ivorensis, the one-entry (diameter) Husch’s model generated similar stem volume estimates to Spurr’s model.

This is a preview of subscription content, log in via an institution to check access.

Access this article

Price excludes VAT (USA)
Tax calculation will be finalised during checkout.

Instant access to the full article PDF.

Fig. 1
Fig. 2
Fig. 3

Similar content being viewed by others

References

Download references

Acknowledgements

We appreciate the two anonymous reviewers for their valuable suggestions to improve the manuscript. This work was supported by Embrapa [Project Number 03.13.14.011.00.00] and CNPq [Grant Number 420467/2016-5]. The first author thanks the Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) for the scholarship.

Author information

Authors and Affiliations

Authors

Corresponding author

Correspondence to Felipe Martini Santos.

Electronic supplementary material

Below is the link to the electronic supplementary material.

Supplementary material 1 (DOCX 182 kb)

Rights and permissions

Reprints and permissions

About this article

Check for updates. Verify currency and authenticity via CrossMark

Cite this article

Santos, F.M., Terra, G., Chaer, G.M. et al. Modeling the height–diameter relationship and volume of young African mahoganies established in successional agroforestry systems in northeastern Brazil. New Forests 50, 389–407 (2019). https://doi.org/10.1007/s11056-018-9665-1

Download citation

  • Received:

  • Accepted:

  • Published:

  • Issue Date:

  • DOI: https://doi.org/10.1007/s11056-018-9665-1

Keywords

Navigation