Agroforestry Systems

, Volume 91, Issue 2, pp 295–306 | Cite as

Management of carob tree orchards in Mediterranean ecosystems: strategies for a carbon economy implementation

  • Pedro José Correia
  • José Filipe Guerreiro
  • Maribela Pestana
  • Maria Amélia Martins-Loução
Article
  • 263 Downloads

Abstract

This paper offers a different framework for managing Mediterranean drought carob-tree orchard ecosystems. Two dry-farming systems were compared during two consecutive years: pure productive orchards and mixed orchards in a total of 360 mature trees distributed by 18 plots with areas of 0.55 and 0.30 ha per plot, respectively. Carob, fig, almond and olive trees compose mixed orchards. Trees of the mixed orchards were more productive than those of pure orchards. The main problem of both systems was the large variability and the low fruit production due to non-bearing trees, inducing unfavorable economic returns. Yield varied between 7.7 and 28.5 kg tree−1 respectively in pure and mixed orchards. In this paper we propose to use carbon sequestration calculations as an added benefit to farmers. A carbon stocking model estimation was established, based on trunk diameters of different trees. We depicted two management scenarios based on fruits production and carbon sequestration incomes: a low value scenario, using mean fruit production, and a high valuable scenario based on the hypothesis that all trees reached its potential maximum. Since under dry-farming systems fruit production irregularity is still a pendent problem, mixed orchards may offer a potential higher revenue, while maintaining higher crop diversification and whole biodiversity. C sequestration benefit, as here we purpose, may represent 125–300 % of income, respectively under low or high valuable scenario. Thus, CO2 equivalent is a novel ecological economic incentive that may potentiate a new income for farmers while assuring carob ecosystem services.

Keywords

Carbon sequestration Ceratonia siliqua Ecosystems service Environment Fruit production Gross income 

Notes

Acknowledgments

The authors are grateful to the project AGRO306 coordinated by F. Keil do Amaral for providing some of the experimental data used in this work. Data on Fig. 6 was provided by V. Drago (Leziria, Portugal).

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Copyright information

© Springer Science+Business Media Dordrecht 2016

Authors and Affiliations

  • Pedro José Correia
    • 1
  • José Filipe Guerreiro
    • 2
  • Maribela Pestana
    • 1
  • Maria Amélia Martins-Loução
    • 3
  1. 1.MeditBio – Centre for Mediterranean Bioresources and FoodUniversidade do AlgarveFaroPortugal
  2. 2.AIDA - Associação Interprofissional para o Desenvolvimento da Produção e Valorização da Alfarroba - Loteamento Industrial de LouléLouléPortugal
  3. 3.Ce3C – Centre for Ecology, Evolution and Environmental Changes – Faculdade de CiênciasUniversidade de LisboaLisbonPortugal

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