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Evaluation of the content of trace elements in the aerial and underground biomass of perennial grasses of the genus Miscanthus

Stypczyńska Z., Dziamski A., Jaworska H., Dąbkowska-Naskręt H.

Environment Protection Engineering

2018

Vol. 44, nr 3

141--151

The content of lead, zinc, copper, nickel and chromium in the aerial and underground parts of M. sinensis from eleven years old plantation and M. sacchariflorus and M. giganteus from nine years old plantations were analysed in order to recognize what organs of the plant play the most important function as a metal accumulator. It was found that in the aboveground parts, lead, zinc and copper were accumulated mostly in leaves and nickel and chromium in stems of the studied species. In underground plant parts, especially in roots, zinc, copper and nickel were most abundantly accumulated, while rhizomes accumulated higher amounts of lead and chromium. The content of lead, zinc and copper was definitely lower in those plant organs than their content in soil. The content of nickel and chromium, on the other hand, showed the opposite dependence. A similar capacity for uptaking trace elements from soil was observed for M. sacchariflorus and M. giganteus, while M. sinensis it was much lower, which is confirmed by the values of the bioaccumulation factors. The translocation factor for trace metals in the studied grass species indicated great translocation of lead and nickel from the roots to rhizomes, and that of zinc to aboveground parts.

Higher and lower heating values of selected lignocellulose materials

Dukiewicz H., Waliszewska B., Zborowska M.

Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology

2014

No. 87

60--63

Biomass is a promising alternative energy source. The most common raw material is straw in the form of bales, briquettes and pellets, although considerable demand is also observed for other energy crops. Introduced alien plants are used for various purposes: as fodder, in fermentation and as energy crops. This study aimed at the determination of higher heating value of plants of three species from the families Miscanthus and Sorgum in terms of their potential use as energy source before and after methane fermentation. Higher heating value of the tested raw materials was high both before and after the fermentation process.