Auteurs, date et publication :
Auteurs Chloé Vagnon , Franck Cattanéo , Chloé Goulon , David Grimardias , Jean Guillard , Victor Frossard
Publication : Ecosphere
Date : 2025
Volume : 12
Issue : 3
Catégorie(s)
#INRAE #OLAAuteurs, date et publication :
Auteurs Theo Baracchini , Stef Hummel , Martin Verlaan , Andrea Cimatoribus , Alfred Wüest , Damien Bouffard
Publication : Environmental Modelling & Software
Date : 2025
Volume : 134
Pages : 104787
Catégorie(s)
#INRAE #OLAAuteurs, date et publication :
Auteurs Abad Chabbi , J Lehmann , Philippe Ciais , Henry William Loescher , Maria Francesca Cotrufo , A Don , M SanClements , L Schipper , J Six , P Smith , others
Publication : Nature Climate Change
Date : 2025
Volume : 7
Issue : 5
Pages : 307
Catégorie(s)
#ACBB #ACBB Lusignan #INRAEAuteurs, date et publication :
Auteurs M. Christina , J. P. Laclau , J. M. L. Gonçalves , C. Jourdan , Y. Nouvellon , J. P. Bouillet
Publication : Ecosphere
Date : 2025
Volume : 2
Issue : 3
Pages : 27
Catégorie(s)
#CIRAD #FORET Itatinga #INRAERésumé
The diverse and important use of wood from fast growth eucalyptus plantations requires the analysis of the effect of mineral fertilizers on wood quality. The objective of this study was to evaluate the anatomical characteristics and wood density from Eucalyptus grandis trees (3 m x 2 m spacing) fertilized with potassium and sodium (at planting, 6 th and 12th month). Fifteen (15) 6 years old eucalyptus trees were selected (5 trees/treatment), cut and wood samples at DBH (1,3 m) were taken for anatomical characteristics (fiber and vessels) and wood density analysis. Results showed that eucalyptus trees treated with mineral fertilizers did not show significant alteration in average wood density, with radial profile model common to all three treatments, characterized by a values increase in the region next to the pith, toward to bark. Mineral fertilization influenced wood anatomical characteristics: treatment with sodium was characterized by thinner walls and lumen larger diameter; in treatment with potassium, larger vessels were detected.
Auteurs, date et publication :
Auteurs C.-R. Sette Jr. , J.-C. de Deus Jr. , M. Tomazello Filho. , F. Andrade de Pádua. , N. Calil. , J.-P. Laclau
Publication : Cerne, Lavras
Date : 2025
Volume : 20
Issue : 2
Pages : 251-258
Catégorie(s)
#CIRAD #FORET Itatinga #INRAERésumé
With the purpose of partial substitution of potassium by sodium in the forest plantations fertilization, the effect of the isolated performance of these nutrients on the chemical properties of young wood in Eucalyptus grandis trees was evaluated. Trees were planted at a 2mx3m spacing and 116 kg.ha-1 of K and 68.5 kg.ha-1 of Na were applied to them. Eucalypt trees were cut down from the 1st to the 4th year after planting in each fertilization treatment, being sectioned disks of wood in different positions of the trunk and marked the annual
growth rings, estimated by a stem profile model. Representative samples of each annual ring, longitudinal position and treatment were obtained for determining the lignin, holocellulose and extractives. Eucalyptus trees that received application of potassium and sodium did not change significantly in chemical properties, indicating that the substitution of K by Na in fertilization of Eucalyptus plantations can be adopted without the alteration of the chemical properties in the young wood in the young trees. Annual evaluations indicated
a significant reduction in average content of lignin and total extractives and an increase in average contents of holocellulose with increasing age of the trees. Consistent changes in the levels of chemical properties of wood for the longitudinal and ring growth were observed.
Auteurs, date et publication :
Auteurs C.-R. Sette Jr. , M. Tomazello Filho , F. Gomes da Silva Jr. , J.-P. Laclau
Publication : Revista Árvore, Viçosa-MG
Date : 2025
Volume : 38
Issue : 3
Pages : 569-578
Catégorie(s)
#CIRAD #FORET Itatinga #INRAERésumé
Drought and heat events, such as the 2018 European drought, interact with the exchange of energy between the land surface and the atmosphere, potentially affecting albedo, sensible and latent heat fluxes, as well as CO
2
exchange. Each of these quantities may aggravate or mitigate the drought, heat, their side effects on productivity, water scarcity and global warming. We used measurements of 56 eddy covariance sites across Europe to examine the response of fluxes to extreme drought prevailing most of the year 2018 and how the response differed across various ecosystem types (forests, grasslands, croplands and peatlands). Each component of the surface radiation and energy balance observed in 2018 was compared to available data per site during a reference period 2004–2017. Based on anomalies in precipitation and reference evapotranspiration, we classified 46 sites as drought affected. These received on average 9% more solar radiation and released 32% more sensible heat to the atmosphere compared to the mean of the reference period. In general, drought decreased net CO
2
uptake by 17.8%, but did not significantly change net evapotranspiration. The response of these fluxes differed characteristically between ecosystems; in particular, the general increase in the evaporative index was strongest in peatlands and weakest in croplands.
This article is part of the theme issue ‘Impacts of the 2018 severe drought and heatwave in Europe: from site to continental scale’.
Auteurs, date et publication :
Auteurs Alexander Graf , Anne Klosterhalfen , Nicola Arriga , Christian Bernhofer , Heye Bogena , Frédéric Bornet , Nicolas Brüggemann , Christian Brümmer , Nina Buchmann , Jinshu Chi , Christophe Chipeaux , Edoardo Cremonese , Matthias Cuntz , Jiří Dušek , Tarek S. El-Madany , Silvano Fares , Milan Fischer , Lenka Foltýnová , Mana Gharun , Shiva Ghiasi
Publication : Philosophical Transactions of the Royal Society B: Biological Sciences
Date : 2020
Volume : 375
Issue : 1810
Pages : 20190524
Catégorie(s)
#ACBB #ACBB Mons #INRAEAuteurs, date et publication :
Auteurs Romain Van Den Bogaert , Jérôme Labille , Sophie Cornu
Publication : Soil Science Society of America Journal
Date : 2025
Volume : 79
Issue : 1
Pages : 43-54
Catégorie(s)
#ACBB #ACBB Mons #INRAERésumé
Soil microorganisms are responsible for organic matter decomposition processes that regulate soil carbon storage and mineralisation to CO2. Climate change is predicted to increase the frequency of drought events, with uncertain consequences for soil microbial communities. In this study we tested the hypothesis that agricultural management used to enhance soil carbon stocks would increase the stability of microbial community structure and activity in response to water-stress. Soil was sampled from a long-term field trial with three soil carbon management systems and was used in a laboratory study of the effect of a dry–wet cycle on organic C mineralisation and microbial community structure. After a drying–rewetting event, soil microcosms were maintained wet and microbial community structure and abundance as well as microbial respiration were measured for four weeks. The results showed that the NO-TILL management system, with the highest soil organic matter content and respiration rate, had a distinct bacterial community structure relative to the conventional and the TILL without fertiliser systems. In all management systems, the rewetting event clearly modified microbial community structure and activity. Both returned to their pre-drought state after 28 days. However, the magnitude of variation of C mineralisation was lower (i.e. the resistance to stress was higher) in the NO-TILL system. The genetic structure of the NO-TILL bacterial communities was most modified by water-stress and exhibited a slower recovery rate. This suggests that land use management can increase microbial functional resistance to drought stress via the establishment of bacterial communities with particular metabolic capacities. Nevertheless, the resilience rates of C mineralisation were similar among management regimes, suggesting that similar mechanisms occur, maybe due to a common soil microbial community legacy.
Auteurs, date et publication :
Auteurs Aurore Kaisermann , Adélaïde Roguet , Naoise Nunan , Pierre-Alain Maron , Nicholas Ostle , Jean-Christophe Lata
Publication : Soil Biology and Biochemistry
Date : 2013
Volume : 66
Pages : 69-77
Catégorie(s)
#Genosol #INRAERésumé
This study describes the Aeolian dust deposition (ADD) in 4 sites of Northern France. Between December 2009 and March 2012, we sampled (i) Aeolian dust every four weeks, and (ii) 6 episodes of forecasted high atmospheric dust load mainly from the Saharan desert, the largest source of Aeolian dust in the world. These samples were treated with oxygen peroxide to remove organic matter so as to only compare the mineral fraction of the samples in the 4 sampling sites and to analyze their mineralogy. The solid samples contained the hardly soluble part of Aeolian dust (H-ADD). Its deposition was of 1.9 Æ 0.3 g mÀ2 yearÀ1 with a seasonal pattern of high deposition from spring to early autumn and a low deposition in winter. H-ADD deposition during the forecasted episodes of high atmospheric load did not systematically exceed the deposition rate during the rest of the sampling period. This indicates that such episodes little contributed to the annual H-ADD rate. The mineralogy revealed a heterogeneous set of minerals dominated by silicates with a common basis of major types (quartz, feldspars, mica, chlorite, kaolinite and interlayered clay minerals in every sample) with randomly trace minerals (Fe-oxides, sulfates, amphibole, talc, gibbsite and carbonates). The chemistry of H-ADD led to a dominant input of Si (up to 4.4 kg haÀ1 yearÀ1), while the nutrients inputs of Ca, K, Mg and P from ADD and the atmospheric organics (APD) in openfield were together of 1.5 Æ 0.5 kg haÀ1 yearÀ1 with a high contribution of soluble minerals and organic matter of ca. 40% for Mg and K, and of ca. 80% for Ca and P. Nutrient inputs from APD are especially an interesting source of P for forests developed on acidic soils.
Auteurs, date et publication :
Auteurs Émeline Lequy , Arnaud Legout , Sébastien Conil , Marie-Pierre Turpault
Publication : Atmospheric Environment
Date : 2025
Pages : 10