Quantifying nitrogen losses in oil palm plantations: models and challenges

Pardon, Lénaïc, Bessou, Cécile, Saint-Geours, Nathalie, Gabrielle, Bénoit, Khasanah, Ni'matul, Caliman, Jean-Pierre, and Nelson, Paul N. (2016) Quantifying nitrogen losses in oil palm plantations: models and challenges. Biogeosciences, 13. pp. 5433-5452.

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Abstract

Oil palm is the most rapidly expanding tropical perennial crop. Its cultivation raises environmental concerns, notably related to the use of nitrogen (N) fertilisers and the associated pollution and greenhouse gas emissions. While numerous and diverse models exist to estimate N losses from agriculture, very few are currently available for tropical perennial crops. Moreover, there is a lack of critical analysis of their performance in the specific context of tropical perennial cropping systems. We assessed the capacity of 11 models and 29 sub-models to estimate N losses in a typical oil palm plantation over a 25-year growth cycle, through leaching and runoff, and emissions of NH3, N2, N2O, and NOx. Estimates of total N losses were very variable, ranging from 21 to 139 kg Nha-1 yr -1. On average, 31 % of the losses occurred during the first 3 years of the cycle. Nitrate leaching accounted for about 80 % of the losses. A comprehensive Morris sensitivity analysis showed the most influential variables to be soil clay content, rooting depth, and oil palm N uptake. We also compared model estimates with published field measurements. Many challenges remain in modelling processes related to the peculiarities of perennial tropical crop systems such as oil palm more accurately.

Item ID: 46150
Item Type: Article (Research - C1)
ISSN: 1726-4189
Additional Information:

© Author(s) 2016. This work is distributed under the Creative Commons Attribution 3.0 License.

Funders: Agence Nationale de la Recherche (ANR)
Projects and Grants: ANR-11-AGRO-0007
Date Deposited: 24 Oct 2016 00:25
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0701 Agriculture, Land and Farm Management > 070101 Agricultural Land Management @ 40%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0703 Crop and Pasture Production > 070301 Agro-ecosystem Function and Prediction @ 40%
07 AGRICULTURAL AND VETERINARY SCIENCES > 0703 Crop and Pasture Production > 070306 Crop and Pasture Nutrition @ 20%
SEO Codes: 82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8203 Industrial Crops > 820399 Industrial Crops not elsewhere classified @ 40%
82 PLANT PRODUCTION AND PLANT PRIMARY PRODUCTS > 8298 Environmentally Sustainable Plant Production > 829802 Management of Greenhouse Gas Emissions from Plant Production @ 20%
97 EXPANDING KNOWLEDGE > 970105 Expanding Knowledge in the Environmental Sciences @ 40%
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