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Nitrogen mineralization and greenhouse gas emissions after soil incorporation of ensiled and composted grass-clover as green manure

Carter, Mette S.; Sørensen, Peter; Petersen, Søren O. and Ambus, Per (2013) Nitrogen mineralization and greenhouse gas emissions after soil incorporation of ensiled and composted grass-clover as green manure. 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. 41-42.

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Online at: http://www.njf.nu/filebank/files/20130827$203251$fil$4F15WCXLGK9vjP9XUSjP.pdf

Summary

This 3-month incubation study showed that ensiled grass-clover was a better nitrogen (N) source than a composted grass-clover and straw mix (grass-clover:straw, 4:1, w:w), owing to the high content of labile compounds compared to the more degraded compost. Our study also indicated that emissions of the strong greenhouse gas nitrous oxide (N2O) can be reduced by incorporating green manure using harrowing instead of ploughing. The silage-derived N release by the end of the incubation was equivalent to 38-42 kg N ha-1, which corresponded to one third of the N applied in silage, with no difference between ploughing and harrowing. In contrast, no net release of mineral N was detected from the composted grass-clover.


EPrint Type:Conference paper, poster, etc.
Type of presentation:Paper
Agrovoc keywords:
LanguageValueURI
EnglishNitrogen mineralizationhttp://aims.fao.org/aos/agrovoc/c_36243
EnglishGreen manureshttp://aims.fao.org/aos/agrovoc/c_3375
EnglishGreenhouse gaseshttp://aims.fao.org/aos/agrovoc/c_34841
EnglishSoil managementhttp://aims.fao.org/aos/agrovoc/c_7176
Subjects: Crop husbandry > Composting and manuring
Soil > Nutrient turnover
Environmental aspects > Air and water emissions
Research affiliation: Denmark > Organic RDD 1 > HighCrop
International Conferences > 2013: NJF Seminar 461 - Organic farming systems as a driver for change
ISSN:1653-2015
Deposited By: Sørensen, Peter
ID Code:24520
Deposited On:06 Nov 2013 19:46
Last Modified:01 May 2014 09:45
Document Language:English
Status:Published
Refereed:Peer-reviewed and accepted

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