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| Axelsen, Jørgen Aagaard; Holmstrup, Martin. |
| Earthworms are known to play a role in the nitrogen mineralisation in agricultural soils. Here we present simulations of the population dynamics of two earthworm species that are dominating in danish arable land, and compare the simualtions with observed densities (number and biomass) of the two species from three fields in Denmark. The simulations show an acceptable fit to the observations. The simulation model is used to quantify the impact of the observed earthworm populations on the minearalisation of nitrogen and in turn the crop production. The simulations show an increase in yield due to the earthworm contribution to mineralisation, and that the earthworms can be responsible for about 1/3 of the biologically mineralised nitrogen. |
| Tipo: Journal paper |
Palavras-chave: Cereals; Pulses and oilseeds Production systems Soil biology Biodiversity and ecosystem services. |
| Ano: 2005 |
URL: http://orgprints.org/4661/2/4661.pdf |
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| Krogh, P.H.; Lamandé, M.; Eriksen, Jørgen; Holmstrup, Martin. |
| Earthworms have long been recognized for their soil engineering capacities. Since the creation of the ecosystem service concept the utilitarian perception of nature has gained a lot of attention and funding for research. Hence, we selected earthworms and their burrowing activities to enable an assessment of their influence on water movement and nutrient release. The study went on in autumn where earthworm population densities and their burrowing activities were quantified in plots of third year clover-grass crops differing in fertilisation and the manner of removing the biomass either by grazing or cutting. We found very high biomasses as expected for clover-grass about 200 g wet earthworm weight m-2. The common earthworm association typical to our region... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Soil biology; Biodiversity and ecosystem services; Farm nutrient management. |
| Ano: 2001 |
URL: http://orgprints.org/20690/9/20690b.pdf |
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