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Flakkebjerg (sandblandet ler) Holeby (lerjord)<br />
Vårbyg 24 37 25 40 51<br />
Havre 28 37 33 46 54<br />
Vinterhvede efter kløvergræs 44 50 47 50 62<br />
Vinterhvede efter havre 29 44 27 46 57<br />
Vinterhvede efter hvede 28 42 22 37 59<br />
Ært/byg 32 35 39 39 40<br />
WP7. Den økologiske forsøgsstation Rugballegård<br />
Den økologiske forsøgsstation omfatter aktiviteter i både mark og stald. Mark-aktiviteterne omfatter<br />
140 ha med økologisk dyrkede foderafgrøder, hvor markerne er opdelt i et kvægsædskifte, et<br />
svinesædskifte og et blandet sædskifte. Kvælstofinputtet i systemerne er vist i tabel 5.<br />
Husdyrbestanden på bedriften omfatter 60 malkekøer med kalve og en svinebestand på 65 søer, 6 orner<br />
og 1300 fedesvin. Alle dyr opstaldes og fodres i henhold til EU's økologiske regler.<br />
Tabel 5. Kvælstofinput (kg N/ha) i de tre systemer på Rugballegaard.<br />
Kvæg Svin Blandet<br />
Husdyrgødning 108 82 71<br />
Græssende dyr 43 30 36<br />
Kvælstoffiksering i bælgplanter 89 30 60<br />
I alt 240 142 167<br />
Publicering og formidling<br />
International, videnskabelig formidling<br />
Askegaard, M. & Eriksen, J. 2000. Potassium retention and leaching in an organic crop rotation on loamy<br />
sand as affected by contrasting potassium budgets. Soil Use and Management 16, 200-205.<br />
Askegaard M. & Eriksen J. (accepted). Exchangeable potassium in soil as indicator of potassium status<br />
in an organic crop rotation on loamy sand. Soil Use and Management<br />
Eriksen, J. & Jensen, L.S. (2001). Soil respiration and nitrogen mineralisation in situ following cultivation of<br />
temporary pastures. Biology and Fertility of Soils 33, 139-145.<br />
Eriksen, J. (2001). Nitrate leaching and growth of cereal crops following cultivation of contrasting<br />
temporary grasslands. Journal of Agricultural Science, Cambridge 136, 271-281.<br />
Eriksen, J., Olesen, J.E. & Askegaard, M. (accepted). Sulphur leaching and sulphur balances of an<br />
organic cereal crop rotation on three Danish soils. European Journal of Agronomy<br />
Eriksen, J. & Søegaard, K. (2000). Nitrate leaching following cultivation of contrasting temporary<br />
grassland. Grassland Science in Europe 5, 577-579.<br />
Føreid, B., Porter, J.R. & Mogensen, V.O. (submitted). Effects of short rotation coppice in strips<br />
between crops – 1. Microclimatic effects.<br />
Føreid, B., Porter, J.R. & Mogensen, V.O. (submitted). Effects of short rotation coppice in strips<br />
between crops – 2. Crop growth and development<br />
Guggenberger, G., Christensen, B.T. & Rubæk, G.H. (2000). Isolation and characterization of labile<br />
organic phosphorus pools in soils from the Askov long-term field experiments. Journal of Plant<br />
Nutrition and Soil Science 163, 151-155.<br />
Iversen, C.K., Pedersen, H.L., Olsen, C.E. & Brandt, K. (in press). Relationship between phenolic<br />
compounds, disease resistance and cover crop type of 5 black currant (Ribes nigrum L.) varieties.<br />
Journal of Biological Agriculture & Horticulture.<br />
110
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