LACLAU Jean-Paul


CIRAD Montpellier

 Directeur Adjoint d'Eco&Sols



Montpellier SupAgro, bâtiment 12, 2 place Viala
34060 Montpellier Cedex 2, Montpellier, France
E-mail : Cette adresse e-mail est protégée contre les robots spammeurs. Vous devez activer le JavaScript pour la visualiser.
Téléphone : 33 (0)4 99 61 24 96 ; Secrétariat : 04 99 61 30 46
Site web :

Brief Bio

Jean-Paul Laclau has been working on the nutrition of tropical planted forests for 25 years, In central Africa during 9 years, then in Brazil since 2002. He is forest engineer and obtained his MSc and his PhD in Agronomy from the Institut National Agronomique Paris Grignon in France, now called AgroPariTech.

He spent 3 years in New Caledonia to carry out inventories in native forests, then he went to the Congo to manage 40000 ha of commercial eucalypt plantations during 4 years. After this technical experience, he compared the biogeochemical cycles of nutrients in native savannahs and eucalypt plantations in the Congo during his PhD with Dr. Jacques Ranger (INRA). After the PhD, he spent 12 years as a visiting professor in Brazil (University of São Paulo and University of the state of São Paulo) and keeps strong relationships with Brazilian universities with his current position in France. He was appointed as Chercheur at CIRAD in 1992, and studied the effects of management practices in eucalypt plantations on soil fertility and water resources.

Research interest

Jean-Paul Laclau is currently working at UMR Eco&Sols as senior scientist from CIRAD and is also Deputy-Head of this research group.

He is mainly interested by the biogeochemical mechanisms influencing the sustainability of tropical planted forests in a context of climate change. He works on resource use efficiency (light, water and nutrients) with a specific interest on the role of very deep roots on water and nutrient capture in highly weathered soils.


Battie-Laclau P., Delgado-Rojas J.S., Christina M., Nouvellon Y., Bouillet J.-P., Piccolo M.C., Moreira M.Z., Gonçalves J.L.M., Roupsard O., Laclau J.-P., 2016. Potassium fertilization increases water-use efficiency for stem biomass production without affecting intrinsic water-use efficiency in Eucalyptus grandis plantations. Forest Ecology and Management, 364, 77-89.

Paula R.R., Bouillet J.-P., Trivelin P.C.O., Zeller B., Gonçalves J.L.M., Nouvellon Y., Bouvet J.-M., Plassard C., Laclau J.-P., 2015. Evidence of short-term belowground transfer of nitrogen from Acacia mangium to Eucalyptus grandis trees in a tropical planted forest. Soil Biology and Biochemistry, 91, 99-108.

Versini, A., Mareschal, L., Matsoumbou, T., Zeller, B., Ranger, J., Laclau, J.-P., 2014. Effects of litter manipulation in a tropical Eucalyptus plantation on leaching of mineral nutrients, dissolved organic nitrogen and dissolved organic carbon. Geoderma, 232–234, 426–436

Battie-Laclau, P., Laclau, J-P., Domec, J-C., Christina, M., Bouillet, J-P., Piccolo, M.C., Gonçalves, JLM, Moreira, R.M., Krusche, A.V., Nouvellon, Y., 2014. Effect of potassium and sodium supply on drought-adaptative mechanisms in Eucalyptus grandis plantations. New Phytologist, 203, 401-413.

Laclau J.-P., Silva, E. A., Lambais, G., Bernoux, M., le Maire, G., Stape, J.L., Bouillet, J.P., Gonçalves, J.L.M., Jourdan, C., Nouvellon ,Y., 2013. Dynamics of soil exploration by fine roots down to a depth of 10 m in Eucalyptus grandis plantations. Frontiers in Plant Science, vol. 4, article 243.

Bouillet J.-P., Laclau J.-P., Gonçalves J.L.M., Voigtlaender M., Gava J.L., Leite F.P., Hakamada R., Mareschal L., Mabiala A., Tardy F., Levillain J., Deleporte P., Epron D., Nouvellon Y., 2013. Eucalyptus and Acacia tree growth and stand production over a full rotation in single- and mixed-species plantations across 5 sites in Brazil and Congo. Forest Ecology and Management, 301, 89-101.

Laclau J.-P., Nouvellon Y., Reine C., Gonçalves J.L.M., Krushe A.V., Jourdan C., le Maire G., Bouillet J.-P., 2013. Mixing Eucalyptus grandis and Acacia mangium trees leads to transgressive fine root over-yielding and exclusion of the weakest competitor from resource-rich soil layers. Oecologia, 172, 903-913.

Nouvellon Y, Laclau JP, Epron D, le Maire G, Bonnefond JM, Gonçalves JLM, Bouillet JP, 2012. Carbon allocations throughout the development of monospecific and mixed-species plantations of Eucalyptus grandis and Acacia mangium in Brazil. Tree physiology, 32, 680-695.

Christina M., Laclau J.-P., Gonçalves J.L.M., Jourdan C., Nouvellon Y., Bouillet J.-P., 2011. Almost symmetrical vertical growth rates above and below ground in one of the world's most productive forests. Ecosphere, 2(3), art27.

Laclau J.-P., Levillain J., Deleporte P., Nzila J.D., Bouillet J.-P., Saint-André L., Versini A.,  Mareschal L., Nouvellon Y., Thongo M’Bou A., Ranger J., 2010. Organic residue mass at planting is an excellent predictor of tree growth in Eucalyptus plantations established on a sandy tropical soil. Forest Ecology and Management, 260, 2148-2159.

FaLang translation system by Faboba