|
|
|
| Registros recuperados: 30 | |
|
| |
|
| |
|
| |
|
| |
|
|
| Elmholt, S.; Labouriau, R.. |
| A multi-soil study was conducted in Denmark including 29 sites, 8 classified as ‘Organic’, 11 as ‘Conventional with manure and synthetic fertilisers’ and 10 as ‘Conventional with synthetic fertilisers’. The variability of fungal abundance within the three farming systems and the long-term effects of different farming systems on fungal propagules in soil were evaluated. Fungal abundance showed large variations within all three farming systems and this variability reduced the possibility to obtain general conclusions on fungal composition in soils under different farming systems. This was illustrated by the results on total propagule numbers of filamentous fungi and yeasts. Penicillium spp. and Gliocladium roseum were more abundant under organic than... |
| Tipo: Journal paper |
Palavras-chave: Soil biology; Biodiversity and ecosystem services. |
| Ano: 2005 |
URL: http://orgprints.org/3328/1/3328.pdf |
| |
|
|
| Kristensen, E.F.; Elmholt, S.; Thrane, U.. |
| Mycotoxin producing fungi are natural contaminants of cereals and their toxins are harmful to humans and animals. Ochratoxin A (OTA) is among the most important. Heat treatment by drum drying does not eliminate already formed mycotoxins but the technique can reduce the number of viable fungi on the grain. The aim of this study was to establish a drying regime that kills fungal propagules on rye without reducing its quality for baking. Special attention was paid to some important mycotoxin producing species. As drying temperatures and retention time in the drum are essential, the drum drier must be equipped with an effective control unit. Two different control systems were tested. The results showed that fungi colonising the grain can be much more... |
| Tipo: Journal paper |
Palavras-chave: Crop health; Quality; Protection Post harvest management and techniques Cereals; Pulses and oilseeds. |
| Ano: 2005 |
URL: http://orgprints.org/3327/1/3327.pdf |
| |
|
| |
|
| |
|
| |
|
| |
|
|
| Schjønning, P.; Elmholt, S.; Christensen, B.T.. |
| There is an urgent need to analyse the term soil quality in more detail. Most frequently, it is used to describe soil attributes. The term should be used for this purpose only when related to the sustainability concerns (i) soil productivity, (ii) impact on the environment, and (iii) effect on human health. The soil quality concept has been adopted mainly as a technical framework for grading soil and evaluating management effects. We advocate more focus on soil quality as a cognitive concept associated with sustainability. Grading of soils by indicators is difficult across soil types, climates and cropping systems. The indexing of soil quality indicators introduce a significant loss of information on the complex agroecosystem. The contributions to the... |
| Tipo: Book chapter |
Palavras-chave: Research methodology and philosophy; Soil. |
| Ano: 2004 |
URL: http://orgprints.org/1471/1/Chapt01_tex_ref_final.doc |
| |
|
|
| Elmholt, S.. |
| The paper outlines the current knowledge concerning fate of mycotoxins in the soil environment, including - outline of mycotoxins addressed (trichothecenes, zearalenone, fumonisins, aflatoxins, ochratoxins and patulin) - routes by which the mycotoxins enter the soil environment - routes by which they are immobilised or removed from the soil environment - mycotoxigenic fungi and mycotoxins in the soil environment |
| Tipo: Journal paper |
Palavras-chave: Post harvest management and techniques; Soil biology. |
| Ano: 2008 |
URL: http://orgprints.org/7400/1/7400.pdf |
| |
|
|
| Frisvad, J.C.; Lund, F.; Elmholt, S.. |
| Aims: To examine if molecular amplified fragment length polymorphism (AFLP) fingerprinting of the only ochratoxin A-producing species in European cereals, Penicillium verrucosum, can be used as a method in hazard analysis using critical control points (HACCP). Methods and Results: A total of 321 isolates of P. verrucosum were isolated from ochratoxin A contaminated cereals from Denmark (oats), UK (wheat and barley) and Sweden (wheat). Of these, 236 produced ochratoxin A as determined by thin layer chromatography; 185 ochratoxin A-producing isolates were selected for AFLP fingerprinting. A total of 138 isolates had unique AFLP patterns, whereas 52 isolates could be allocated to small groups containing from two to four isolates with similar AFLP patterns.... |
| Tipo: Journal paper |
Palavras-chave: Post harvest management and techniques. |
| Ano: 2005 |
URL: http://orgprints.org/7392/1/7392.pdf |
| |
|
|
| Schjønning, P.; Munkholm, L.J.; Elmholt, S.; Olesen, J.E.. |
| Management-induced depletion in soil organic carbon (SOC) may create critical tilth conditions for arable farming. We investigated the short-term effect of crop rotation and addition of animal manure on SOC fractions, the dispersibility of soil clay, the length of fungal hyphae, wet aggregate stability, tensile strength of dry aggregates, and the pore size distribution, gas diffusivity and permeability of undisturbed bulk soil. SOC fractions were measured in whole-soil samples and in 1-2 mm air-dried aggregates. Plough layer soil was sampled five and six years after the start of a field experiment with different cropping systems at two loamy sand soils (Foulum, ~9% clay and Flakkebjerg, ~14% clay). A soil drop test was performed in the field to evaluate in... |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Soil biology; Soil quality; Soil tillage; Composting and manuring. |
| Ano: 2007 |
URL: http://orgprints.org/7750/1/7750.pdf |
| |
|
| |
|
| |
|
|
| Elmholt, S.. |
| En tung og knoldet jord er vanskelig at bearbejde. Det kan medføre et dårligt såbed og dårlig fremspiring. Og da en sådan jord også har få porer begrænses transporten af vand og ilt til planternes rødder. Herved forringes leveforholdene smådyr og mikroorganismer og der bliver en dårligere forsyning med næringsstoffer til planterne. For at få et godt såbed skal jorden have en god struktur – den skal gerne danne krummer (aggregater). De bygges op af jordens grunddele eller 'primærpartikler' ler og sand. Til at binde primærpartiklerne sammen kræves bindemidler. I danske jorde er biologiske bindemidler de vigtigste. Der findes to slags. Det ene er klisterstoffer, der dannes af planterødder, bakteri-er og svampe. Det andet er svampetråde (hyfer), der... |
| Tipo: Newspaper or magazine article |
Palavras-chave: Soil biology; Soil tillage. |
| Ano: 2005 |
URL: http://orgprints.org/7414/1/7414.pdf |
| |
|
| |
|
|
| Elmholt, S.; Schjønning, P.; Munkholm, L.J.. |
| Soil crumbs are important to soil functions. These include plant growth, and the growth of fungi and bacteria forming agents for binding and bonding of new crumbs. We have studied how commercial organic and conventional farming affect this interaction. A diverse crop rotation, including grass, and animal manure resulted in stable crumbs with a high content of biological binding and bonding agents. A cash crop rotation with the addition of only synthetic fertilizers resulted in small, stable aggregates – more like clods - with clay as binding agent. Such a soil will provide poor conditions for preparing seedbeds, because prolonged rain makes it soft and muddy while drought makes it hard as brick. |
| Tipo: Journal paper |
Palavras-chave: Crop combinations and interactions; Soil biology; Soil tillage; Composting and manuring. |
| Ano: 2005 |
URL: http://orgprints.org/7423/1/7423.PDF |
| |
| Registros recuperados: 30 | |
|
|
|
