Journal article
Residual nitrogen effect of clover-ryegrass swards on yield and N uptake of a subsequent winter wheat crop as studied by use of 15N methodology and mathematical modelling
Plant Nutrition Laboratory, Department of Agricultural Sciences, Royal Veterinary and Agricultural University, 40 Thorvaldsensvej, DK-1871 Copenhagen, Denmark
The residual effect of 2-year-old swards of clover-ryegrass mixture and ryegrass in monoculture on yield and N uptake in a subsequent winter wheat crop was investigated by use of the 15N dilution method and by mathematical modelling. The amount of N in the wheat crop, derived from clover-ryegrass residues was 25–43% greater than that derived from residues of ryegrass which had been growing in monoculture.
Expressed in absolute values, the N uptake in the subsequent winter wheat crop was 23–28 kg N ha −1 greater after clover-ryegrass mixture than after ryegrass in monoculture. Up to about 54 kg N ha−1 of the N mineralised from the clover-ryegrass crop was calculated to be leached, whereas only 11 kg N ha−1 was leached following ryegrass in monoculture.
Language: | English |
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Year: | 1997 |
Pages: | 235-243 |
ISSN: | 18737331 and 11610301 |
Types: | Journal article |
DOI: | 10.1016/S1161-0301(96)02050-3 |
ORCIDs: | Schjoerring, Jan K. |