Evaluation of the Yield of Giant Miscanthus (Miscanthus × giganteus) and Sugar Miscanthus (Miscanthus sacchariflorus) Intended for Energy Purposes in Variable Habitat Conditions

This study evaluated the production potential of M. sacchariflorus and M. giganteus depending on plantation age and soil type. The analyses showed that the leaf area index was dependent on the Miscanthus genotype, soil type, and plantation age. The mean leaf angle, on the other hand, was mainly affected by plantation age. Significant differences in plant height were found, resulting from genotype, soil type, and plantation age. The biomass yield obtained from Miscanthus plantations was also dependent on soil type, plantation age, and genotype. The biomass moisture content was to a lesser extent affected by the interactions between genotype and soil type, and between soil type and plantation age, but it was dependent on the interaction between genotype and plantation age. The calorific value of the tested biomass was mainly influenced by the Miscanthus genotype and, to a lesser extent, by plantation age and soil type. The highest calorific value was found in the biomass of M. sacchariflorus, regardless of soil type and plantation age, while the lowest was recorded for M. giganteus biomass, irrespective of soil type.