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Effects of applying anaerobically digested slurry on soil available organic C and microbiota

Johansen, A.; Pommeresche, R.; Riley, H. and Løes, A.-K. (2013) Effects of applying anaerobically digested slurry on soil available organic C and microbiota. In: Løes, Anne-Kristin; Askegaard, Margrethe; Langer, Vibeke; Partanen, Kirsi; Pehme, Sirli; Rasmussen, Ilse A.; Salomon, Eva; Sørensen, Peter; Ullvén, Karin and Wivstad, Maria (Eds.) Organic farming systems as a driver for change, NJF Report, no. 9 (3), pp. 125-126.

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Summary

Anaerobic digestion of animal slurries and plant residues is a valuable technology to produce bioenergy and fertilizers in organic farming systems, while at the same time reducing propagules of weeds and parasites in the input material. However, the digestion changes the quality of the slurry by reducing its content of organic matter and increasing mineral nitrogen (N) levels. This may have profound impact on soil fauna and microorganisms as well as the biogeochemical processes they drive. Organic farmers fear that application of digested materials may have negative implications for soil fertility by reducing the input of organic matter to the soil, compared to fertilizing with traditional animal slurries or green manures. Hence, it is important to gain knowledge about the short- and long-term effects on microflora and carbon (C) balance in soils fertilized with digested slurry.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Agrovoc keywords:
Language
Value
URI
English
Soil microorganisms
http://aims.fao.org/aos/agrovoc/c_36167
English
Biochemical processes
http://aims.fao.org/aos/agrovoc/c_331094
English
Carbon
http://aims.fao.org/aos/agrovoc/c_1301
English
Liquid manures
http://aims.fao.org/aos/agrovoc/c_4373
English
Biogas
http://aims.fao.org/aos/agrovoc/c_9262
Subjects: Soil > Soil quality
Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Research affiliation: International Conferences > 2013: NJF Seminar 461 - Organic farming systems as a driver for change
ISSN:1653-2015
Deposited By: Sørensen, Peter
ID Code:24569
Deposited On:06 Nov 2013 21:46
Last Modified:06 Nov 2013 21:46
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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