Does the oil palm root system uniformly distribute in standard plantation?

Jourdan Christophe, Aholoukpe Hervé, Pujianto, Caliman Jean-Pierre. 2015. Does the oil palm root system uniformly distribute in standard plantation?. In : Sustainable management of soil in oil palm plantings. Webb Michael J. (ed.), Nelson Paul N. (ed.), Bessou Cécile (ed.), Caliman Jean-Pierre (ed.), Sutarta Edy Sigit (ed.). Canberra : ACIAR, Résumé, 46. (ACIAR Proceedings, 144) ISBN 978-1-925133-63-9 Workshop on Sustainable Management of Soil Fertility under Oil Palm, Medan, Indonésie, 7 Novembre 2013/8 Novembre 2013.

Résumé : Despite their importance for plant production, estimations of below-ground biomass and its distribution in the soil of an oil palm plantation are still difficult and time-consuming to make, and no single reliable methodology is available for different root types. Moreover, soil organic matter distribution may vary within a plantation depending on the management of pruned fronds and the distribution pattern of frond piles. In order to characterise root distribution within oil palm plantations, two sampling methods based on different soil sampling volumes were tested in Indonesia (Libo, Sumatra) and West Africa (Pobè, Benin): auger (8 cm in diameter), simplified Voronoi trench (2.7 m3) and a full Voronoi trench (5.8 m3), chosen as the reference method. Results indicated that the auger method underestimated root biomass estimation by 4% and 53% compared with the Voronoi method in 2- and 17-year-old plantations, respectively. The simplified Voronoi method is proposed to estimate root biomass in field conditions. Results also showed a significant (p < 0.001) positive correlation of root biomass and root length density to nutrient and soil organic matter content when we compared frond pile areas and frond-free pile inter-row. The impacts were significant for coarse and fine roots in Indonesia and for fine roots only in Benin. Moreover, these effects were observed mainly in the first 20 cm of soil and decreased thereafter with increasing soil depth and distance to frond piles. Recycling pruned leaves in the oil palm plantation promoted a significant development of roots and provided benefits to the oil palm for water and nutrient supply. (Texte intégral)

Classification Agris : F50 - Anatomie et morphologie des plantes
F62 - Physiologie végétale - Croissance et développement
P33 - Chimie et physique du sol

Auteurs et affiliations

• Jourdan Christophe, CIRAD-PERSYST-UMR Eco&Sols (FRA) ORCID: 0000-0001-9857-3269
• Aholoukpe Hervé, CIRAD-PERSYST-UPR Systèmes de pérennes (FRA)
• Pujianto, SMART Research Institute (IDN)
• Caliman Jean-Pierre, SMART Research Institute (IDN)

Source : Cirad-Agritrop (https://agritrop.cirad.fr/579071/)

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