Modifying harvesting time as a tool to reduce nutrient export by timber extraction: a case study in planted teak (Tectona grandis L.f.) forests in Costa Rica
Jesús Fernández-Moya (1-2) , Nur Algeet-Abarquero (2-3), Gilberto Cabalceta (2), Alfredo Alvarado (2), Alfonso San Miguel-Ayanz (1), Miguel Marchamalo-Sacristán (3)
iForest - Biogeosciences and Forestry, Volume 9, Issue 5, Pages 729-735 (2016)
doi: https://doi.org/10.3832/ifor1756-009
Published: Jun 03, 2016 - Copyright © 2016 SISEF
Research Articles
Abstract
Despite its low nutrient concentration, the high amount of biomass accumulated in the tree stem makes it an important nutrient sink. Hence, nutrient loss through timber removal at harvesting is a major cause of nutrient impoverishment at some forest sites. The present study was designed to test the following hypotheses: (a) nutrient allocation in the different tree tissues would be affected by (re)translocation processes related with leaf senescence; hence, (b) timber may have a higher nutrient concentration during the defoliated period (in deciduous species); and consequently, (c) modifying harvesting time could influence nutrient export. To test these hypotheses, the present study analyzes the intra-annual dynamics of foliar and trunk nutrient concentration in a planted teak (Tectona grandis L.f.) forest in Costa Rica. Samples from nine trees were taken at nine sampling times between June 2012 and August 2013. The results confirm the above-mentioned hypotheses and reveal that modifying harvesting time have different consequences: (1) when harvesting occurs between August and October, it reduces the N-P-K exported through timber harvesting by 24-29-43%; (2) when harvesting occurs in December, the reduction is 28-29-14%. Harvesting between August and October (rainy season) may involve logistical difficulties. Harvesting slightly earlier than usual (i.e., December, just after the rainy season but before leaf senescence) would therefore be an efficient approach to reducing nutrient export through timber extraction.
Keywords
Forest Nutrition, Soil Fertility, Soil Depletion, Sustainability, Forest Plantations, Nutrient Resorption
Authors’ Info
Authors’ address
Alfonso San Miguel-Ayanz
Dpto. Silvopascicultura, E.T.S.I. Montes, Universidad Politécnica de Madrid (UPM), Ciudad Universitaria s/n, 28040 Madrid (Spain)
Nur Algeet-Abarquero
Gilberto Cabalceta
Alfredo Alvarado
Centro de Investigaciones Agronómicas, Universidad de Costa Rica (CIA-UCR), San Pedro (Costa Rica)
Miguel Marchamalo-Sacristán
Dpto. Ingeniería y Morfología del Terreno, Universidad Politécnica de Madrid (UPM), Ciudad Universitaria s/n, 28040 Madrid (Spain)
Corresponding author
Paper Info
Citation
Fernández-Moya J, Algeet-Abarquero N, Cabalceta G, Alvarado A, San Miguel-Ayanz A, Marchamalo-Sacristán M (2016). Modifying harvesting time as a tool to reduce nutrient export by timber extraction: a case study in planted teak (Tectona grandis L.f.) forests in Costa Rica. iForest 9: 729-735. - doi: 10.3832/ifor1756-009
Academic Editor
Ana Rey
Paper history
Received: Jun 26, 2015
Accepted: Feb 08, 2016
First online: Jun 03, 2016
Publication Date: Oct 13, 2016
Publication Time: 3.87 months
Copyright Information
© SISEF - The Italian Society of Silviculture and Forest Ecology 2016
Open Access
This article is distributed under the terms of the Creative Commons Attribution-Non Commercial 4.0 International (https://creativecommons.org/licenses/by-nc/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.
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