Showing papers by "Jacques Berthelin published in 2014"
TL;DR: In this article, the authors investigated the impact of arable land conversion to Short Rotation Coppice (SRC) on soil biota by assessing biological and physico-chemical soil properties that are affected by SRC compared to forestry, grassland and an agro-system.
Abstract: Despite many studies on the impact of arable land conversion to Short Rotation Coppice (SRC), few studies have been carried out on soil biota This study aims at assessing biological and physico-chemical soil properties that are affected by SRC compared to forestry, grassland and an agrosystem All samples were collected in the Aisne valley (France), from the same type of soil, with four land uses, ie willow SRC, agrosystem, grassland and alluvial forest, 3 years after SRC was planted We studied fertility, the biological community (earthworm diversity, density and biomass, bacterial and fungal density and community structures) and biochemical parameters (enzyme activities, basal respiration and nitrification) After 3 years’ growth, soil biological parameters (fungal abundance, laccase activity, anecic earthworm proportion and earthworm diversity) and CEC were higher in the SRC than in the agrosystem soil In parallel, fungal abundance was higher in SRC than in forest and grassland soils Compared to annual arable crops, SRC promoted biological properties However, in the short term, the parameters we measured were lower than in the forest and grassland soils The use of certain parameters as indicators of soil functioning/quality assessment to discriminate the four land uses is discussed
35 citations
Journal Article•
TL;DR: In this article, the effect of salinity on the structure and activities of bacterial consortia involved in iron reduction process were studied at two saline concentrations (0 and 3% NaCl).
Abstract: In the saline paddy soils of Thailand, four bacterial consortia (S1, S2, S6, and S8) were isolated in paddy soils and then selected for their abilities and efficiencies to reduced iron oxyhydroxyde (goethite) at different concentration of salt in culture medium. In this study, the effect of salinity on the structure and activities of bacterial consortia involved in iron reduction process were studied at two saline concentrations (0 and 3% NaCl). The results show that the bacterial consortia presented different behaviors in the presence or absence of salt. The bacterial consortia S1 and S2 were not affected by the presence of salt. Bacterial consortium S6 had a higher iron-reducing activity under saline conditions than in a non-saline environment. The iron reducing activity of the bacterial consortium S8 was inhibited by the presence of salt but not fermentation processes. In this rice fields, the presence of diverse halosensitive to slightly halophilic bacterial groups and also of bacteria presenting both fermentative and iron-respiring metabolisms are able to maintain a strong ability in iron-reduction and dissolution under changing saline environmental conditions.