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Assessment of use of graminoid stands for biogas production
RYCHTEROVÁ, Jana
The MSc. Thesis is part of project No. 2B06131 of the National Research Programme of the Czech Republic. The aim of the work was to assess selected herbaceous stands in repsct to their use for biogas production. A working hypothesis was set as follows: The biogas production per unit organic matter does not differ between biomass coming from different types of grasslands/biotopes. The results support the hypothesis. The sites studied were located in altitudes from 400 to 800 m a.s.l., water availavility ranged from mesexerophytic to hydrophytic conditions and nutrient availability ranged from mesooligotrophic to eutrophic conditions. According to plant species composition, the stands corresponded to stand types Alopecuretum pratense, Phalaridetum, Poetum pratense, Arrhenatheretum elatioris, Festucetum pratense and the ruderal stand type. In spite of these differences, biogass production estimated according to ZIFO was very similar for all stands, i.e. in a range of 518 {--} 546 NL biogas per kg organic substances in dry matter and had almost identical methan content. The results indicate that, in assessment of suitability of herbaceous stands for biogass production, biomass production is of greater importance than plant species composition.
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Exercise Lathyrus pratensis in different types of grass stands.
ŠVECOVÁ, Mariana
Fodder from lasting grass growths serves from 80% to fed ruminants. Therefore is setting high emphasis on quality fodder from trifolium, grass and trifolium-grass growths. On this account fit itrodukcion try in these growths imply at full blast useful kinds plants (trifolium), which have improving effects on fodder. Once of these improving products is also Lathyrus pratensis. His introduction increases substitution legumin in lasting meadow growths and share rhizobial nitrogen on production knows - nose fodder and nutritive valuable degestible nitrogen factory materials. Occurrence Lathyrus pratensis is impressed with type herbal growth and his differential management.
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