Nitrogen dynamics in a nutrient-poor soil under mixed-species plantations of eucalypts and acacias
| Autor: | Sogni Viviane Tchichelle, Louis Mareschal, Lydie-Stella Koutika, Daniel Epron |
|---|---|
| Přispěvatelé: | Centre de Recherche sur la Durabilité et la Productivité des Plantations Industrielles (CRDPI), Ecologie et Ecophysiologie Forestières [devient SILVA en 2018] (EEF), Institut National de la Recherche Agronomique (INRA)-Université de Lorraine (UL), 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), Intensfix Project ANR-2010-STRA004-03, CIRAD, Ecofor, Allenvi and the french national research infrastructure ANAEE-F, French National Research Agency through the Laboratory of Excellence ARBRE ANR-12-LABXARBRE-01, 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), ANR-10-STRA-0004,Intens&Fix,Intensification écologique des écosystèmes de plantations forestières. Modélisation biophysique et évaluation socio-économique de l'association d'espèces fixatrices d'azote(2010) |
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
azote particulaire [SDV]Life Sciences [q-bio] 01 natural sciences Casuarina equisetifolia CARBON Nutrient acacia MINERALIZATION BUDGETS 2. Zero hunger CONGO biology SOUTHERN CHINA 04 agricultural and veterinary sciences Nitrogen Eucalyptus Plantation forestière Arbre fixateur d'azote eucalyptus Cycle de l'azote Fertilizer culture mixte Arénosol Fixation de l'azote fertilité des sols Soil Science Acacia chemistry.chemical_element engineering.material SANDY SOIL sol pauvre en matière organique Microbiology Matière organique du sol productivité Fertilité du sol Culture en mélange Botany ORGANIC-MATTER ASSESSMENT réduction d'intrants CONSEQUENCES Soil organic matter P35 - Fertilité du sol Mineralization (soil science) 15. Life on land biology.organism_classification K10 - Production forestière mixed cropping F61 - Physiologie végétale - Nutrition chemistry Agronomy dynamique de l'azote 040103 agronomy & agriculture engineering 0401 agriculture forestry and fisheries Environmental science Soil fertility FIXING TREES FRACTIONS 010606 plant biology & botany |
| Zdroj: | Soil Biology and Biochemistry Soil Biology and Biochemistry, Elsevier, 2017, 108, pp.84-90. ⟨10.1016/j.soilbio.2017.01.023⟩ |
| ISSN: | 0038-0717 |
| DOI: | 10.1016/j.soilbio.2017.01.023⟩ |
| Popis: | Introducing nitrogen-fixing species (NFS) in eucalypt plantations is a useful practice to compensate nitrogen loss at harvest, reduce fertilizer inputs, improve soil fertility and sustain forest productivity in low input systems.Nitrogen (N) and carbon (C) were evaluated in the active part of soil organic matter (SOM) i.e., the particulate organic matter (POM), which was obtained after soil (0-0.05 m) physical fractionation at the end of a first 7-year rotation (R1Y7) and at year 2 of a second rotation (R2Y2) in pure acacia (100A), pure eucalypt (100E) and mixed-species (50A50E) stands in an experimental plantation established on an Arenosol in the Congolese coastal plains. N concentration (in g kg(-1) of soil) was higher in coarse POM (cPOM, 4000-250 mu m) in 100A and 50A50E compared to 100E at 2YR2, while no difference was found in fine POM (fPOM, 250-50 gm) and in the organo-mineral fraction (OMF, < 50 mu m). N content in cPOM was more than 3 times higher at R2Y2 than at R1Y7. A slight increase was also observed in fPOM, while no difference was observed in OMF between R1Y7 and R2Y2. Lower C:N ratios in the two POM fractions in 100A and, to a lesser extent, in 50A50E compared to 100E suggests an improved soil N status after acacia trees have been introduced in eucalypt plantations.The lack of difference in N content of coarse POM between 100A and 50A50E at R1Y7, despite higher amount of N in the forest floor and N returning to the soil (harvest residues and litterfall) in 100A than in 50A50E, suggests a faster cycling of nitrogen under acacia than under eucalypt. |
| Databáze: | OpenAIRE |
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