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Long-term effects of cropping systems on the earthworm populations in a loam soil

Pommeresche, Reidun; Hansen, Sissel; Eltun, Ragnar and Korsaeth, Audun (2006) Long-term effects of cropping systems on the earthworm populations in a loam soil. Poster at: Joint Organic Congress, Odense, Denmark, May 30-31, 2006.

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Summary

Abstract - Six cropping systems, ranging from conventional arable without livestock to organic livestock farming dominated by ley, have been compared since 1990 in SE Norway. Earthworm density (ED), earthworm biomass (EB), channel density (CD) and species of worms were measured in the topsoil (0-25 cm) in 1994 and 2004. Ley in the crop rotation increased EB, ED and CD in both organic and conventional systems, but a ley proportion higher than 25 % only increased CD. Among the arable systems, the organic system hosted more individuals (ED) and a higher biomass (EB) of earthworms as compared to the conventional systems. The conventional arable systems had low values in 2004, and only minor changes in EB and ED during the period compared with the other systems. The earthworm species observed were field worm (Aporrectodea caliginosa), pink worm (A. rosea) and night crawlers (Lumbricus terrestris).


EPrint Type:Conference paper, poster, etc.
Type of presentation:Poster
Subjects: Crop husbandry > Production systems > Pasture and forage crops
Crop husbandry > Production systems > Cereals, pulses and oilseeds
Soil > Soil quality > Soil biology
Research affiliation: International Conferences > 2006: Joint Organic Congress > Theme 4: Crop systems and soils
Deposited By: Hansen, Sissel
ID Code:7372
Deposited On:10 May 2006
Last Modified:12 Apr 2010 07:32
Document Language:English
Status:Published
Refereed:Not peer-reviewed

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