The effect of sowing date and seed pretreatments on establishment of the energy plant Silphium perfoliatum by sowing
Seeds treated with gibberellic acid or potassium nitrate, and cold-stratified seeds showed a significantly higher field emergence than the untreated control group. Germination experiments under controlled conditions in the laboratory confirmed the significant positive effect of seed pretreatments on germination. Mean field emergence decreased as the growing season advanced. Field emergence correlated with leaf area index and ground cover. Pelleted seeds were able to overcome the unfavourable seed flow characteristics. In conclusion, stand establishment of S. perfoliatum in Central Europe by sowing is feasible when using pelleted seeds implemented with gibberellic acid and adhering to a sowing date at the end of April.
Document Type: Research Article
Publication date: July 1, 2016
This article was made available online on May 18, 2016 as a Fast Track article with title: "The effect of sowing date and seed pretreatments on establishment of the energy plant <i>Silphium perfoliatum</i> by sowing".
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