Effects of crop rotation and reduced nitrogen fertilisation on Apera spica-venti populations in a long-term experiment.
Apera spica-venti is one of the most serious annual grass weeds in Germany and may cause considerably yield losses in untreated fields. A long-term field experiment was conducted investigating the effects of crop rotation and nitrogen fertiliser use on A. spica-venti populations. A six-field cash-crop rotation with 67% winter cereals and a six-field fodder crop rotation with 50% winter cereals were studied. The rate of tillering was in the fodder crop rotation significantly higher than in the cash crop rotation. The halving of nitrogen fertilizer dose caused a significant increase in the tillering rate. Most plants of A. spica-venti emerged in winter wheat. There was an increase of emerged A. spica-venti in winter wheat from year to year.
University of Rostock, Faculty for Agricultural and Environmental Sciences, Group Crop Health, Satower Str. 48, DE-18051 Rostock, Germany. andrea.schulz2@uni-rostock.de
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Schulz
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Pallurt
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Gerowitt
D000383:Agriculture / Q000379:methods*; D018556:Crops, Agricultural / Q000254:growth & development*; D002523:Edible Grain / Q000254:growth & development*; D005308:Fertilizers / Q000032:analysis*; D009584:Nitrogen / Q000032:analysis*; D057685:Plant Weeds / Q000254:growth & development*; D012621:Seasons; D058728:Weed Control / Q000379:methods*
D005308:Fertilizers; D009584:Nitrogen