Enzymatic Activity of Soil on the Occurrence of the Endangered Beetle (Coleoptera: Chrysomelidae) in Xerothermic Grasslands.

This work attempts to find the reasons for the rather limited range of occurrence of in Poland, based on soil properties, which affects both the plant cover and the entomofauna. The aim of the study was to assess the influence of soil enzyme activity on the occurrence of in xerothermic grasslands in Southern Poland. The sites inhabited by the beetle were most often extensively grazed by farm animals or had recently been cleared of bushes.

Comparison of biogas production from wild and cultivated varieties of reed canary grass.

The chemical composition and efficiency of biogas production in the methane fermentation process of silages of wild and cultivated varieties of reed canary grass were compared. An attempt was made to answer the question on how the habitat and the way of utilization of plants affect chemical composition and biogas yield. Physicochemical properties such as dry matter, organic dry matter, protein, fat, crude fiber fraction, macro- and microelements content were considered.