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This analysis touches upon an evaluation and estimation of the potential of communes in Małopolska voivodeship in terms of energetic use of plant biomass. The research results showed that if biomass, in the form of straw and hay not used in agriculture and willow (salix) cultivated on lands out of agricultural production, was marked for energetic aims, the generation of about 8.3 PJ of energy would be possible. It was also pinpointed that within the group of communes with the highest potential of hay and willow for energetic use (25% of communes), environmental (the quality of production space) and economic factors (the area structure, and configuration, etc.) will hinder the development of the biomass market. The same conditions which contributed to the regress of agriculture are seen as an obstacle to effective and profitable biomass production. The only real opportunity for development of the biomass market is seen in straw, which can be acquired in communes with the best natural and economic conditions.
Civilizational development requires seeking for more and more modern methods of satisfying growing needs of the society. Living standards grow together with economic growth and, as a result, demand for energy grows as well. This fact is tantamount with the necessity to look for alternative energy sources. Otherwise, our civilization will soon have to face degradation of natural environment and shortage of conventional energy resources. Under Polish conditions, crucial role in utilizing renewable energy is played by biomass, and its importance is going to grow over the years. The present study has assessed productivity of three willow clones: Tur, Ekotur and Turbo, grown in short rotations on farmland.
“Biomass as a source of renewable energy used for heating of buildings”. The possibilities connected with the generation of renewable energy for heating of buildings were presented in this paper. The biomass was characterized and the analysis of biomass as a fuel was conducted. The ecological aspects of biomass combustion were discussed, as well as their comparison with conventional sources of energy.
The harvest efficiency of the basket willow was assessed in Beskid Żywiecki, at the altitudes of 500 m. asl. In a three-years period. The harvest of dry willow mass in that period was calculated in the study, yearly crop, and the energetic values in GJ/ha were determined.
Utilizable features of Miscanthus genotypes were defined in order to choose the most appropriate genotypes for the production of biomass in Poland. Seven genotypes of Miscanthus species from TINPLANT Laboratory in Magdeburg were investigated. They are as follow: Miscanthus sinensis (M40, M07, M105), Miscanthus robustus (M115, M114), Miscanthus x giganteus and its related M117 genotype. Plants were planted in 0.85 x 0.80 m spacing (14 705 plants·ha⁻¹). Directly before the harvest in January 2005, the height of five plants of each of genotypes and the diameter of their shoots were measured. The shoots were also counted. Giganteus and M117 Genotype were characterised by the highest height, diameter and yield. Statistically there were no-significant differences between the yields of the investigated Miscanthus genotypes.
Digestibility-balance experiments were performed on 20 barrows of average weight about 26 kg, divided into 5 groups. Pigs were given complete mixtures PP-grower. In the experimental diets, part of soyabean meal and wheat bran were substituted with rapeseed meal at the rate of 10% (diet no. 2), rapeseed cake - 10% (diet no. 3), rapeseed cake with rape seeds - 4%+6% (diet no. 4), or rape seeds - 8% (diet no. 5). Feeding rapeseed feeds had no significant effect on the digestibility of crude protein. Diets containing 10% of rapeseed meal induced a significant improvement of the digestibility of crude fibre, NDF, ADF, N-free extractives and organic matter. Enrichment of the feeds with fat, achieved by an addition of rapeseed cake and seeds, improved digestibility of ether extract, but it tended to decrease digestibility of N-free extractives and organic matter as compared with RSM diet. The use of the PP-grower mixtures with rapeseed feeds (meal, cake, seeds) improved nitrogen retention and utilization. The results pertaining to energy utilization showed that substitution of soyabean meal and wheat bran with rapeseed meal or rapese­ed cake had no negative effect on the daily intake of digestible and metabolizable energy. Increased fat content in the diets containing rape seeds resulted in higher energy losses with the faeces and in a noticeable decrease digestibility of energy.
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