Short term effects of nitrogen fertilization on light climate and white clover growth and morphology in a mixed sward
1995
Hoeglind, M. (Swedish University of Agricultural Sciences, Uppsala (Sweden). Department of Crop Production Science)
An experiment was carried out at Uppsala, Sweden, to study the effects of mineral nitrogen (N) fertilization on sward light climate and white clover growth and morphology during a summer regrowth in a mixed meadow fescue/white clover sward. It is suggested that the rapid clover height increase after N application is a photomorphogenic response, triggered by the reduced R:FR ratio of the light, in turn caused by the effects of N on grass growth and colour. Earlier observations, indicating that the number of stolon growing points is also affected very early after N application, at a time when only R:FR ratio but not the light penetration has decreased as a result of this treatment, could not be verified in the present study
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