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Time-dependent effects of fertilization on plant biomass in floating fens

2002; Wiley; Volume: 13; Issue: 5 Linguagem: Inglês

10.1658/1100-9233(2002)013[0705

1654-1103

Sabine Güsewell, Willem Koerselman, Jos T. A. Verhoeven,

Soil Carbon and Nitrogen Dynamics

Journal of Vegetation ScienceVolume 13, Issue 5 p. 705-718 Full Access Time-dependent effects of fertilization on plant biomass in floating fens Sabine Güsewell, Corresponding Author Sabine Güsewell Utrecht University, Department of Geobiology, P.O. Box 80084, NL-3508 TB Utrecht, The Netherlands Corresponding author; Current address: Geobotanisches Institut ETH Zürich, Zürichbergstrasse 38, CH-8044 Zürich, Switzerland; Fax +4116321215; E-mail [email protected]Search for more papers by this authorWillem Koerselman, Willem Koerselman Kiwa Water Research, P.O. Box 1072, NL-3430 BB Nieuwegein, The NetherlandsSearch for more papers by this authorJos T.A. Verhoeven, Jos T.A. Verhoeven Utrecht University, Department of Geobiology, P.O. Box 80084, NL-3508 TB Utrecht, The NetherlandsSearch for more papers by this author Sabine Güsewell, Corresponding Author Sabine Güsewell Utrecht University, Department of Geobiology, P.O. Box 80084, NL-3508 TB Utrecht, The Netherlands Corresponding author; Current address: Geobotanisches Institut ETH Zürich, Zürichbergstrasse 38, CH-8044 Zürich, Switzerland; Fax +4116321215; E-mail [email protected]Search for more papers by this authorWillem Koerselman, Willem Koerselman Kiwa Water Research, P.O. Box 1072, NL-3430 BB Nieuwegein, The NetherlandsSearch for more papers by this authorJos T.A. Verhoeven, Jos T.A. Verhoeven Utrecht University, Department of Geobiology, P.O. Box 80084, NL-3508 TB Utrecht, The NetherlandsSearch for more papers by this author First published: 24 February 2002 https://doi.org/10.1111/j.1654-1103.2002.tb02098.xCitations: 41AboutPDF ToolsRequest permissionExport citationAdd to favoritesTrack citation ShareShare Give accessShare full text accessShare full-text accessPlease review our Terms and Conditions of Use and check box below to share full-text version of article.I have read and accept the Wiley Online Library Terms and Conditions of UseShareable LinkUse the link below to share a full-text version of this article with your friends and colleagues. Learn more.Copy URL Share a linkShare onEmailFacebookTwitterLinkedInRedditWechat Abstract Abstract. A cross-over fertilization experiment was carried out in Dutch floating fens to investigate effects on biomass production in the same and the following years. In total 16 fertilizer treatments were applied, combining four treatments in 1999 with four treatments in 2000 (addition of 20 g.m−2 N, 5 g.m−2 P, both elements and unfertilized control). The above-ground biomass production of vascular plants was co-limited by N and P in both years. However, in plots that were only fertilized in 1999 the effects of individual nutrients differed between the two years: N-fertilization slightly increased the amount of biomass produced in the same year (1999), whereas P-fertilization did so in the following year (2000). Fertilizer applied in 1999 also influenced the effects of fertilizer applied in 2000. One year after N-fertilization vascular plant growth was still co-limited by N and P, but one year after P-fertilization, vascular plant growth was only limited by N. Bryophyte biomass responded weakly to fertilization. Nutrient concentrations in plant biomass, nutrient standing crops and measurements of N and P availability in the soil indicated that one year after fertilization, the N-fertilizer had mostly 'disappeared' from N-fertilized plots, whereas the availability of P remained markedly enhanced in P-fertilized plots. In addition, P-fertilization enhanced the uptake of N by plants the following year. The time-dependence of fertilizer effects was probably caused by (1) higher addition of P than of N relative to the requirements of plants; (2) longer retention of P than of N in the system; (3) positive effect of P-fertilization on the availability of N; (4) contrasting effects of N- and P-fertilization on nutrient losses by plants and/or on their responses to subsequent nutrient addition; (5) changing interactions between vascular plants and mosses (mainly Sphagnum spp.); (6) nutrient export through the repeated harvest of above-ground biomass. 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