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Yield and nitrogen losses in oil palm plantations: Main drivers and management trade-offs determined using simulation

Pardon L., Huth N., Netelenbos Nelson P., Banabas M., Gabrielle B., Bessou C.. 2017. Field Crops Research, 210 : p. 20-32.

Oil palm cultivation has environmental impacts, including those associated with nitrogen (N) losses. Improving management practices to optimise yield and N losses is critical. In order to identify the key management and site parameters driving yield and N losses, over a 25-year cycle, we undertook a Morris's sensitivity analysis of the Agricultural Production Systems sIMulator oil palm model (APSIM-Oil palm), using 3 sites in Papua New Guinea. We selected 12 parameters and 3 outputs: yield, nitrous oxide (N2O) emissions and N leaching. The influence of the 12 parameters on the outputs depended on site characteristics, age of the palms, and climate. The most influential parameters for losses were N mineral fertiliser rate, drainage and fraction of legume in groundcover vegetation. The simulations suggested that APSIM-Oil palm is a useful tool for assessing management options for optimising yield and environmental outcomes in different environments. The results can also guide future measurements needed to improve N loss estimates, and further development of models and risk indicators. (Résumé d'auteur)

Mots-clés : fertilité du sol; drainage; engrais minéral; fertilisation; pratique culturale; conditions météorologiques; facteur de risque; oxyde nitreux; émission atmosphérique; modélisation environnementale; physiologie de la nutrition; efficacité d'utilisation; teneur en azote; efficacité; Évaluation de l'impact; impact sur l'environnement; modèle de simulation; plantations; perte; rendement des cultures; elaeis guineensis; papouasie-nouvelle-guinée

Thématique : Culture des plantes; Fertilisation; Chimie et physique du sol; Physiologie végétale : nutrition; Systèmes et modes de culture

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