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Research article2006Peer reviewedOpen access

'Non-exchangeable' ammonium in soils from Swedish long-term agricultural experiments: Mobilization and effects of fertilizer application

Roing K, Andren O, Mattsson L

Abstract

In intensive agricultural systems, efficient nutrient use is necessary for high crop yields as well as for sustainable environmental management. Recent studies in temperate regions indicate that non-exchangeable NH4+-N (NEA), which is fixed in clay minerals, may affect crop productivity and soil N dynamics more than previously thought. To estimate the quantity and plant availability of NEA in Swedish soils, ryegrass (Lolium perenne) was grown in a pot experiment using 18 soils that were collected (0-20 cm depth) from two long-term agricultural experiment series at five locations. Initial NEA, total N and soil K contents were measured, as well as NEA content 56, 112 and 168 days after planting of ryegrass. The results show that the soils (0-20 cm) contained 21-217 mg NEA kg(-1) sieved soil (5 - 300 kg NEA ha(-1)) estimated as corresponding to 0.1 - 5.1% of the total soil N. Long-term application of farmyard manure (FYM) did not increase contents of soil NEA. Long-term application of K fertilizer increased soil contents of AL-extractable K, but there was no significant correlation with NEA content. Concurrent with ryegrass growth, NEA content decreased on average by 16% between day 0 and day 112, indicating that NEA was released from the soil and taken up by the plants

Published in

Acta Agriculturae Scandinavica, Section B - Soil and Plant Science
2006, Volume: 56, number: 3, pages: 197-205
Publisher: TAYLOR & FRANCIS AS

      SLU Authors

    • Röing de Nowina, Kristina

      • Department of Soil Sciences, Swedish University of Agricultural Sciences

      • Andrén, Olof

        • Department of Soil Sciences, Swedish University of Agricultural Sciences

        • Mattsson, Lennart

          • Department of Soil Sciences, Swedish University of Agricultural Sciences

        UKÄ Subject classification

        Agricultural Science

        Publication identifier

        DOI: https://doi.org/10.1080/09064710510038069

        Permanent link to this page (URI)

        https://res.slu.se/id/publ/10889