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Características morfométricas de tres especies de pacay (Inga spp.) que afectan la calidad de la sombra en sistemas agroforestales de cacao (Theobroma cacao)

Campos Villanueva, Consuelo; Domic, Alejandra; Seidel, Renate; Niether, Wiebke and Schneider, Monika (2020) Características morfométricas de tres especies de pacay (Inga spp.) que afectan la calidad de la sombra en sistemas agroforestales de cacao (Theobroma cacao). [Morphometric characteristics of three species of Pacay (Inga spp.) that affect shade quality in cocoa agroforestry systems (Theobroma cacao).] Agro-Ecológica, 1 (1), pp. 1-12.

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Trees of the genus Inga are used in agroforestry systems with cocoa and coffee because of their ecosystem services. In agroforestry systems, the canopy closure and the morphological characteristics of the shade trees are crucial for the growth of the cocoa. This study aims to show that species from the genus Inga are not similar, though in many places only one common name describes the whole genus (e.g. “pacay” in Bolivia), but that they show specific traits that affect the canopy. The objective was to evaluate the function of genus Inga trees, specifically the I. ingoides, I.marginata and I. spectabilis species, regarding the quality of shade for the development of Theobroma cacao. The study area is located in Sara Ana, in the municipality of Alto Beni, in northeastern department of La Paz, at an altitude of 430 meters above sea level, in the Subandean Amazonian forest ecoregion. To this end, we compared both the percentage of shade of Inga spp. between two cocoa Agroforestry Systems - conventional and organic - as well as the morphometric characters. The evaluation of the shade effectiveness with the functional species in cocoa Agroforestry Systems with the genus Inga, showed a similar proportion of canopy closure in conventional plots and in organic plots. The I. ingoides species has an average of 73% closed canopy, I. spectabilis a closed canopy of 59% and I. marginata 84% closed canopy. The morphometric analysis of I. ingoides showed a linear positive increase in diameter at breast height (DBH) with plant height. Similarly, the canopy increased linearly with height, and a positive relationship was also recorded between canopy and DBH. In the case of I. marginata, no statistically significant relationship was observed between the morphometric characters. I. spectabilis only showed a linear increase in DBH as the total height increased. The three Inga species showed interspecies specific differences according to their shading characteristics that affect their applicability in agroforestry systems with cocoa: producers have to consider climatic situations (sun-shine hours per day) and their ability to manage a certain species before species selection and planting.

EPrint Type:Journal paper
Keywords:Agroforestry Systems, Inga, shade, Theobroma cacao, Abacus, FiBL6516603
Agrovoc keywords:
cacao (plant) -> Theobroma cacao
Subjects: Crop husbandry > Production systems
"Organics" in general > Countries and regions > Bolivia
Research affiliation: Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > Crops > Special crops > Cocoa
Switzerland > FiBL - Research Institute of Organic Agriculture Switzerland > International > Agroforestry Systems
Deposited By: Forschungsinstitut für biologischen Landbau, FiBL
ID Code:43497
Deposited On:27 Jan 2022 11:22
Last Modified:27 Jan 2022 11:22
Document Language:English
Refereed:Peer-reviewed and accepted

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