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| Eriksen, J; Thorup-Kristensen, K. |
| Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. The ability of catch crops (Italian ryegrass [Lolium multiflorum Lam], winter rape [Brassica napus L.] and fodder radish [Raphanus sativus L.]) to reduce soil sulphate concentrations in autumn and make it available to a succeeding crop was investigated in a field experiment on sandy loam soil. All catch crops reduced soil sulphate concentrations in the autumn compared to bare soil. Especially the cruciferous catch crops had the ability to deplete efficiently soil sulphate levels and thus, reduce the sulphate leaching potential. The S uptake in aboveground catch crop was 8, 22 and 36 kg S ha-1 for ryegrass, winter rape and fodder... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Nutrient turnover. |
| Ano: 2002 |
URL: http://orgprints.org/235/1/nyEriksen.doc |
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| Eriksen, J; Thorup-Kristensen, K. |
| Sulphate leaching losses may reduce the long-term possibility of maintaining the S supply of crops in low input farming systems. The ability of catch crops (Italian ryegrass [Lolium multiflorum Lam], winter rape [Brassica napus L.] and fodder radish [Raphanus sativus L.]) to reduce soil sulphate concentrations in autumn and make it available to a succeeding crop was investigated in 1996-98 on sandy loam soil in Denmark. All catch crops reduced soil sulphate concentrations in the autumn compared to bare soil. Especially the cruciferous catch crops had the ability to deplete efficiently soil sulphate levels and thus, reduce the sulphate leaching potential. The S uptake in aboveground catch crop was 8, 22 and 36 kg S ha-1 for ryegrass, winter rape and fodder... |
| Tipo: Journal paper |
Palavras-chave: Nutrient turnover. |
| Ano: 2002 |
URL: http://orgprints.org/168/1/paper.pdf |
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| Thorup-Kristensen, K. |
| A number of methods involving plant or soil analysis or modelling have been developed to optimise N fertilization of vegetable crops. The methods aim at improving the NUE of each single crop, but do not really consider the crop rotation as such. Various measures can be used to increase the NUE of the crop rotation; measures that can be combined with the methods aimed at optimising NUE of each single crop. The aims of the paper are to discuss the methods for optimising NUE at the crop rotation level and to present examples of how this can be done. The main methods discussed are 1) how can crops with different rooting depth be optimally placed in a cropping sequence and 2) how can catch crops be introduced to optimise NUE. Results show that if N left in... |
| Tipo: Conference paper, poster, etc. |
Palavras-chave: Vegetables. |
| Ano: 2002 |
URL: http://orgprints.org/256/1/ActaHort_utilising_differences.pdf |
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