Růžek L., Růžková M., Koudela M., Bečková L., Bečka D., Kruliš Z., Šárka E., Voříšek K., Ledvina Š., Šalounová B., Venyercsanová J. The study is focused on the microbial and chemical parameters of green compost in which composites based on acetylated wheat B-starch and maltodextrin (patented procedure) were biodegraded and also on the parameters of lettuce grown on this compost before and after the biodegradation. With a load of up to 1 g of composites per 1 l of compost, and with a storage period of 0, 7-14, 15-20 and 21-147 days, mixture of compost wiped off the surface both of wellpreserved composites and of the immediate surroundings of their residues was evaluated. Microbial biomass, basal respiration (BR), metabolic quotient, dehydrogenase and arylsulfatase activity (ARS) and the parameters of the lettuce growth on this compost did not show any negative changes. On the contrary acetylated wheat B-starch and maltodextrin stimulated both ARS and BR. ARS showed the most rapid onset among all tests. The height of the aboveground parts of the lettuce (Lactuca sativa L. var. capitata) grown on green compost was significantly better, compared to commercial peat-based substrates.
This study provides a contribution towards increased knowledge on the consumptive water use by arable crops within the temperate climatic zone under specified weather conditions in the field as the main aim of this work. Water demands of Brassica napus L.
Photosynthesis and transpiration rates in the interval of 30 min before and 30 min after copper fungicide application show an increase from the level of 5.0 to 7.0 µmol CO 2 /m 2 /s and 0.75 to 1.00 mmol H 2 0/m 2 /s. Long-term measurements show that the increase of photosynthesis rate after copper application is temporal and fades away after 10
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