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Carrot cropping on organic soil is a hotspot for nitrous oxide emissions

Journal article
Authors Per Weslien
Tobias Rütting
Åsa Kasimir Klemedtsson
Leif Klemedtsson
Published in Nutrient Cycling in Agroecosystems
Volume 94
Issue 2-3
Pages 249-253
ISSN 1385-1314
Publication year 2012
Published at Department of Earth Sciences
Department of Biological and Environmental Sciences
Pages 249-253
Language en
Links dx.doi.org/10.1007/s10705-012-9538-...
Keywords Organic soil, Drainage, Greenhouse gas, Root vegetable, nitrous oxide
Subject categories Environmental Sciences, Agricultural Science, Forestry and Fisheries, Agricultural Science, Soil Science

Abstract

The emissions of the greenhouse gas nitrous oxide (N2O) were measured from a non nitrogen fertilized carrot (Daucus carota ssp. sativa) field on an organic soil in Sweden during one cropping and post-harvest season. The cumulative emission during the measuring period of 149 days was 41 (±2.8) kg N2O ha−1. Dividing the measuring period into a cropping and a post-harvest period revealed that the presence of carrots strongly stimulated N2O emissions, as the emission during the cropping period was one order of magnitude higher compared to the post-harvest period. The N2O emission from the carrot field were higher than fluxes reported from cereal crop and grass production, but in the same order as reported fluxes from vegetable cropping on organic soils. In conclusion, our results indicate that the cultivation of root vegetable, such as carrots, on organic soil can be a high point source for N2O emissions.

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