Stikkord: mikroliv

Global Soil Biodiversity Atlas

| Type artikkel: Rapport

Kategori: Erosjon, Humus, Jordbiologi, Jordpakking, Jordvern, Klima og miljø, Matjord

2015 was the United Nations International Year of Soils and, for the first time, soils and the life within them were in the spotlight globally. We are pleased therefore, that an international group of experts and scientists from the European Commission’s Joint Research Centre (JRC), in close collaboration with colleagues from the Commission’s Directorate-General for the Environment and the Global Soil Biodiversity Initiative, have produced the first ever Global Soil Biodiversity Atlas.

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A long-term field experiment demonstrates the influence of tillage on the bacterial potential to produce soil structure-stabilizing agents such as exopolysaccharides and lipopolysaccharides

| Type artikkel: Publisert studie

Kategori: Humus, Jordbiologi, Matjord, Produksjonsmetoder

Background
Stable soil aggregates are essential for optimal crop growth and preventing soil erosion. However, tillage is often used in agriculture to loosen the soil, which disrupts the integrity of these aggregates. Soil aggregation can be enhanced by bacteria through their ability to produce exopolysaccharides and lipopolysaccharides. These compounds stabilize soil aggregates by “gluing” soil particles together.

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Forbs differentially affect soil microbial community composition and functions in unfertilized ryegrass-red clover leys

| Type artikkel: Publisert studie

Kategori: Gjødsel, Matjord, Næringsstoffer

Increasing plant diversity in agroecosystems is proposed to enhance multiple ecosystem services. Adding selected forbs such as caraway (Carum carvi L.) and plantain (Plantago lanceolata L.) to productive grass-clover mixtures can further enhance forage yields, root biomass, uptake of mineral nutrients and improve animal performance. Yet, it remains unclear whether and how adding these forbs to grass-clover mixtures can influence soil microbial communities and associated soil carbon (C) and nitrogen (N) cycling.

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Resilience of bacteria, archaea, fungi and N-cycling microbial guilds under plough and conservation tillage, to agricultural drought

Climate change causes droughts, which in turn cause significant physiological stress for soil microorganisms. In this study, we investigated how the abundance of total bacterial, crenarchaeal and fungal communities and the abundance of N-cycling microbial guilds responded to a severe agricultural drought event in a long-term experiment of minimum tillage (MT) and conventional ploughing (CT) at two soil depths.

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Suppression of the activity of arbuscular mycorrhizal fungi by the soil microbiota

| Type artikkel: Publisert studie

Kategori: Jordbiologi, Matjord, Sopp

Arbuscular mycorrhizal fungi (AMF) colonise roots of most plants; their extra-radical mycelium (ERM) extends into the soil and acquires nutrients for the plant. The ERM coexists with soil microbial communities and it is unresolved whether these communities stimulate or suppress the ERM activity. This work studied the prevalence of suppressed ERM activity and identified main components behind the suppression.

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THE ROLE OF SOIL BIOLOGY IN CROP NUTRITION

| Type artikkel: Rapport

Kategori: Biologisk mangfold, Humus, Jordbiologi, Matjord

It is vital to support many aspects of soil biology in order to maintain conditions which are beneficial to crop nutrition. The existence of just one organism within the soil can support many others, so a holistic approach to encourage soil biology helps maintain the complex food web; such an approach can be found in agroecological principles.

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