Vertical structure of the soil seed bank below wheat, sugar beet and lucerne
1994
Holub, M. (Vyzkumny Ustav Zemedelske Ekonomiky, Prague (Czech Republic))
Based on the studies of soil seed bank at 3 localities near Tuchoraz (Czech Republic) cropped with winter wheat, sugar beet and lucerne at the end of the summer, the following main conclusions may be drawn: 1. The vertical distribution of seed in the plots under study was heterogeneous. 2. The majority of seeds were accumulated up to the depth of 30 cm. 3. Seeds of 5-6 species prevailed in the seed bank, however, the achenes of Chenopodium album agg. were absolutely predominating. 4. Below lucerne, the highest total amount and species diversity of seeds were concentrated near the soil surface, having shown a rapid decrease towards the deeper layers. 5. Below annual crops, the quantity and species composition of seeds were reduced in the active zone of the soil (0-5 cm). A relatively homogeneous distributuion of seeds up to the depth of 25-30 cm as well as a steep decrease of seed quantity and number of present species in the subsoil (30-40 cm) was found. 6. Regarding the distribution of seeds of the most frequent species with respect to the soil depth, there were similar patterns.
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