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Applications of Cu-based fungicides against downy mildew of grapevines have led to Cu accumulation in the topsoil of vineyards. In such soils, Cu may reach levels high enough to exert adverse effects on soil microorganisms, soil fauna and plant roots. This study aimed to test combinations of compost and biochar for their potential to decrease the bioavailability of Cu in Cu-enriched vineyard soils.Grapevine plants (Vitis vinifera L. cv. Grüner Veltliner) were cultivated in soil columns equipped as microlysimeters during two vegetation periods under greenhouse conditions. The two experimental soils differed in pH (6.2 and 7.2, resp.), organic carbon (2.7 and 0.9%, resp.) and EDTA-Cu (97 and 198 mg kg−1, resp.). Treatments differed in the mixing ratio of compost and biochar, feedstock for biochar and post-pyrolysis modification of biochar. Standard addition rates amounted to 4 kg additive m−2.Cu uptake into the grapevine shoots and leaves hardly responded to the different soil additive treatments. The roots buffered different Cu availability with increased Cu accumulation and largely prevented excessive translocation to aerial plant parts. The soil with lower pH and higher organic carbon content showed more vigorous shoot growth and higher leaf Cu concentrations than the soil of neutral pH in spite of lower EDTA-Cu concentrations of the soil. Soil analyses at the end of the experiment showed that the CaCl2-extractable fraction of Cu was lower in the neutral soil (3% of EDTA-Cu) than in the more acidic soil richer in Corg (8%).The novelty of this study is the inclusion of Cu speciation for investigating the effects of the soil additives. Differences between treatments were more pronounced for Cu2+ than for CaCl2-extractable Cu. All tested additive treatments in the acidic soil showed clear reductions of Cu2+ compared to the control without additives whereas this effect was less expressed but still recognizable in the neutral soil. In the soil

Presentaties van de CBBE docentendag Biobased praktijkonderzoek in het onderwijs op 14 juni 2017, te Hogeschool Van Hall Larenstein, Leeuwarden

RIVM rapport:Abstract niet beschikbaar, The following is an extended summary of the project "A model system approach to biological climate forcing: the example of Emiliania huxleyi," that was carried out within the framework of the Dutch National Programme on Air Pollution and Climate Change (NRP) - phase II. In this report the progress is described that has been made in the formulation of the Dynamic Energy Budget (DEB) Theory that now includes photosynthesis, nutrient limitation and calcification. On top of this the next level of organisation was explored in the adaptation of the model towards a small ecosystem comprising an autotrophic and a heterotrophic organism together with a decomposer, -the dynamics of biomass in vertical profiles has been analysed. At the same time experiments were conducted with E. huxleyi in order to be able to validate the DEB-models at the organismic level. The experiments involved exploration of the genes that control calcification, photosynthesis and nutrition, a detailed description of growth based on chemostat experiments, and an inventory of environmental factors that determine the production of dimethylsulfoniopropionate, the precursor of the biogenic gas dimethylsufide (DMS) that regulates climate once it has reached the atmosphere acting as a source of cloud condensation nuclei.

niet beschikbaar, The following is an extended summary of the project "A model system approach to biological climate forcing: the example of Emiliania huxleyi," that was carried out within the framework of the Dutch National Programme on Air Pollution and Climate Change (NRP) - phase II. In this report the progress is described that has been made in the formulation of the Dynamic Energy Budget (DEB) Theory that now includes photosynthesis, nutrient limitation and calcification. On top of this the next level of organisation was explored in the adaptation of the model towards a small ecosystem comprising an autotrophic and a heterotrophic organism together with a decomposer, -the dynamics of biomass in vertical profiles has been analysed. At the same time experiments were conducted with E. huxleyi in order to be able to validate the DEB-models at the organismic level. The experiments involved exploration of the genes that control calcification, photosynthesis and nutrition, a detailed description of growth based on chemostat experiments, and an inventory of environmental factors that determine the production of dimethylsulfoniopropionate, the precursor of the biogenic gas dimethylsufide (DMS) that regulates climate once it has reached the atmosphere acting as a source of cloud condensation nuclei.

RIVM rapport:Abstract niet beschikbaar, The following is an extended summary of the project "A model system approach to biological climate forcing: the example of Emiliania huxleyi," that was carried out within the framework of the Dutch National Programme on Air Pollution and Climate Change (NRP) - phase II. In this report the progress is described that has been made in the formulation of the Dynamic Energy Budget (DEB) Theory that now includes photosynthesis, nutrient limitation and calcification. On top of this the next level of organisation was explored in the adaptation of the model towards a small ecosystem comprising an autotrophic and a heterotrophic organism together with a decomposer, -the dynamics of biomass in vertical profiles has been analysed. At the same time experiments were conducted with E. huxleyi in order to be able to validate the DEB-models at the organismic level. The experiments involved exploration of the genes that control calcification, photosynthesis and nutrition, a detailed description of growth based on chemostat experiments, and an inventory of environmental factors that determine the production of dimethylsulfoniopropionate, the precursor of the biogenic gas dimethylsufide (DMS) that regulates climate once it has reached the atmosphere acting as a source of cloud condensation nuclei.

RIVM rapport:Abstract niet beschikbaar, The following is an extended summary of the project "A model system approach to biological climate forcing: the example of Emiliania huxleyi," that was carried out within the framework of the Dutch National Programme on Air Pollution and Climate Change (NRP) - phase II. In this report the progress is described that has been made in the formulation of the Dynamic Energy Budget (DEB) Theory that now includes photosynthesis, nutrient limitation and calcification. On top of this the next level of organisation was explored in the adaptation of the model towards a small ecosystem comprising an autotrophic and a heterotrophic organism together with a decomposer, -the dynamics of biomass in vertical profiles has been analysed. At the same time experiments were conducted with E. huxleyi in order to be able to validate the DEB-models at the organismic level. The experiments involved exploration of the genes that control calcification, photosynthesis and nutrition, a detailed description of growth based on chemostat experiments, and an inventory of environmental factors that determine the production of dimethylsulfoniopropionate, the precursor of the biogenic gas dimethylsufide (DMS) that regulates climate once it has reached the atmosphere acting as a source of cloud condensation nuclei.

In the field ‘renewable energy resources’ is formation of biogas an important option. Biogas can be produced from biomass in a multistep process called anaerobic digestion (AD) and is usually performed in large digesters. Anaerobic digestion of biomass is mediated by various groups of microorganisms, which live in complex community structures.

Precede ó tit.: The Saints and servants of God