Sufficient information about the quality characteristics of on-site harvested seed material from valuable donor sites for restoration of endangered grassland communities is a precondition for its successful use. In order to determine the necessary seed rate and the best-suited application method, information about thousand seed weight, purity and germination capacity of the material is essential. Seed mixtures from a herb-rich Molinion litter meadow, harvested with two different methods: i) on-site threshing (OST) and ii) seed stripping (SS), were assessed. The purity of stripped material exceeded 60% and was around 20% higher compared to OST. The germination capacity of the harvested pure seeds treated with and without pre-chilling was investigated. Slight differences between harvesting methods could be observed, whereas pre-chilling of the seed material caused a significant increase in germination capacity of the seed material. The total germination rate did not exceed 30%. Litter meadows contain a high percentage of dormant seeds. This refers to the practical experience that optimal restoration success can be reached if reseeding of Molinion meadows takes place at the end of the season.
Haslgrübler, P., Krautzer, B., Graiss, W., Blaschka, A., Pötsch, E., 2013: Quality characteristics of seed material from selected species or a nutrient poor Arrhenatherion communitiy. Proceedings of the 17th Symposium of the European Grassland Federation "The Role of Grasslands in a Green Future. Threats and Perspectives in Less Favoured Areas", Grassland Science in Europe Volume 18, p. 442-444.