Young shade trees improve soil quality in intensively managed coffee systems recently converted to agroforestry in Yunnan Province, China

Autor: Clément Rigal, Jianchu Xu, Philippe Vaast
Přispěvatelé: Kunming Institute of Botany, World Agroforestry Center (ICRAF), World Agroforestry Centre, Chinese Academy of Sciences [Beijing] (CAS), Ecologie fonctionnelle et biogéochimie des sols et des agro-écosystèmes (UMR Eco&Sols), Institut National de la Recherche Agronomique (INRA)-Institut de Recherche pour le Développement (IRD)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Kunming Institute of Botany [CAS] (KIB), World Agroforestry Center [CGIAR, Philippines] (ICRAF), University of the Philippines Los Baños (UP Los Baños), World Agroforestry Center [CGIAR, Kenya] (ICRAF), Consultative Group on International Agricultural Research [CGIAR] (CGIAR), Institut national d’études supérieures agronomiques de Montpellier (Montpellier SupAgro), Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Institut national d'enseignement supérieur pour l'agriculture, l'alimentation et l'environnement (Institut Agro)-Centre international d'études supérieures en sciences agronomiques (Montpellier SupAgro)-Centre de Coopération Internationale en Recherche Agronomique pour le Développement (Cirad)-Institut de Recherche pour le Développement (IRD)-Institut National de la Recherche Agronomique (INRA)
Rok vydání: 2019
Předmět:
Zdroj: Plant and Soil
Plant and Soil, Springer Verlag, 2019, ⟨10.1007/s11104-019-04004-1⟩
ISSN: 1573-5036
0032-079X
DOI: 10.1007/s11104-019-04004-1
Popis: International audience; Background and aims The trend of soil degradation in intensive open coffee systems is well-documented. This study highlights the impact of young shade trees on soil quality only 4 years after their intercropping with coffee. Methods 18 young shade trees belonging to three tree species (Cinnamomum camphora, Bishofia javanica and Jacaranda mimosifolia) were selected in an intensive coffee system in Southern Yunnan. Soil samples (0-20 cm) were tested for chemical composition, soil communities and soil enzyme activities under their canopies and in open areas, both in coffee rows and inter-rows, once during the rainy and once during the dry season. Additionally, root systems were characterized using trenches. Soil water profiles and litterfall were monitored along the production cycle. Coffee yield was recorded for two consecutive years. Results We detected a positive impact of all shade tree species on soil chemical, biological and biochemical components, especially during the dry season. This positive impact included higher soil organic matter (+10%) and more abundant soil microbial communities (+64%) under shaded coffee than under open coffee. Furthermore , shaded coffee trees yielded as much as open coffee trees, except under C. camphora, probably due to high below-ground competition. Conclusions These results demonstrate that carefully selected shade trees can rapidly contribute to preserving and/or restoring soil quality in intensive coffee systems, while maintaining high coffee yield.
Databáze: OpenAIRE
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