@article{fdi:010062404, title = {{A}lkalinity and structure of soils determine the truffle production in the {P}yrenean {R}egions}, author = {{J}aillard, {B}. and {B}arry-{E}tienne, {D}. and {C}olinas, {C}. and de {M}iguel, {A}. {M}. and {G}enola, {L}. and {L}ibre, {A}. and {N}eveu, {P}. and {O}liach, {D}. and {S}aenz, {W}. and {S}aez, {M}. and {S}alducci, {X}. and {S}ouche, {G}. and {S}ourzat, {P}. and {V}illeneuve, {M}anon}, editor = {}, language = {{ENG}}, abstract = {{A}im of study: {T}he program "{T}ypology of truffle stations in the {P}yrenean {R}egions" aimed to define the ecological conditions and culture practices that favor {T}uber melanosporum growth and fruiting in this area. {A}rea of study: {N}avarra, {C}atalonia, {M}idi-{P}yrenees and {L}anguedoc-{R}oussillon. {M}aterial and methods: {T}he program was based on the survey of 212 wild and cultivated truffle beds of evergreen oaks ({Q}uercus ilex). {T}he data collected in the field consisted of photographs, samples of soil, roots and mycorrhizae, and information on cultural practices followed by truffle growers. {M}ain results: (i) truffle soils are alkaline, from neutral, dolomitic, to moderately or very calcareous soils; (ii) truffle soils are light, well-structured and stable to water immersion; (iii) mycelium that colonizes roots survives in suboptimal conditions, but it does not necessarily bear ascocarps. {F}inally our results suggest that {T} melanosporum is a relatively ubiquitous fungus able to grow, or at least to persist, in a wide range of physical and chemical soil conditions. {W}e propose a probabilistic model of the environment favorable for fruiting, built around a two-dimensional graph with an axis for the chemical conditions, like soil alkalinity, and another axis for the physical conditions, like soil structure. {R}esearch highlights: {S}oil alkalinity and structure allow to built a convenient representation of the ecological capacity of a place to be good {T} melanosporum habitat, and thus of the probability for truffle growers to harvest truffles according to the environmental properties of their truffle orchards.}, keywords = {dolomite ; limestone ; mycorrhizae ; {Q}uercus ilex ; field survey ; {T}uber melanosporum ; {FRANCE} ; {ESPAGNE}}, booktitle = {}, journal = {{F}orest {S}ystems}, volume = {23}, numero = {2}, pages = {364--377}, ISSN = {2171-5068}, year = {2014}, DOI = {10.5424/fs/2014232-04933}, URL = {https://www.documentation.ird.fr/hor/fdi:010062404}, }