NDLI: Leaching of soil organic carbon and nitrogen in sandy soils after cultivating grass-clover swards

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Leaching of soil organic carbon and nitrogen in sandy soils after cultivating grass-clover swards

Content Provider	Springer Nature Link
Author	Vinther, Finn P. Hansen, Elly M. Eriksen, Jørgen
Copyright Year	2005
Abstract	Several studies have focused on the formation and losses of dissolved organic matter in forest systems, whereas a limited number have dealt with this aspect in agricultural soils. The purpose of this study was to estimate the leaching of dissolved organic carbon (DOC) and nitrogen (DON), with focus on the period after cultivating grass-clover swards. Grass-clovers were ploughed in the spring prior to sowing cereals followed by either catch crops or bare soil. The concentrations of DOC and DON decreased with soil depth and ranged at 90-cm soil depth between 7 and 21 mg C L−1 and between 1 and 3 mg N L−1, respectively, in a sandy loam soil, and between 16 and 63 mg C L−1 and between 1 and 10 mg N L−1, respectively, in a coarse sandy soil. The resulting DOC/DON ratios were in the range between 2 and 42, with higher values in the coarse sandy soil than in the sandy loam soil. The total percolation was 218 mm in the sandy loam soil and 596–645 mm in the coarse sandy soil, which resulted in an annual leaching of 22–40 kg DOC ha−1 year−1 and 3–4 kg DON ha−1 year−1 in the sandy loam soil, and 174–310 kg DOC ha−1 year−1 and 10–31 kg DON ha−1 year−1 in the coarse sandy soil. It was shown that higher amounts of DOC were lost by leaching under the catch crops than from bare soil, that losses of DON were higher from bare soil than from soils with catch crops and that DON contributed significantly to the total N loss. Thus, DON needs to be taken into account in N-balance calculations.
Starting Page	12
Ending Page	19
Page Count	8
File Format	PDF
ISSN	01782762
Journal	Biology and Fertility of Soils
Volume Number	43
Issue Number	1
e-ISSN	14320789
Language	English
Publisher	Springer-Verlag
Publisher Date	2005-11-22
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	DOC DOM DON Catch crops Cultivation treatments Soil organic matter
Content Type	Text
Resource Type	Article
Subject	Agronomy and Crop Science Soil Science Microbiology

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