DOI: 10.5593/SGEM2014/B41/S17.011


V. Ion, M. Dumbrava, G. Dicu, A. G. Basa, D. State
Wednesday 1 October 2014 by Libadmin2014

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-15-5 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 1, 77-84 pp

Biomass is an important renewable source of energy more and more of interest for
producing different types of energy, respectively heat, electricity, biofuels (bioethanol, biodiesel, and biogas). Among different sources of biomass, the crop biomass both as residues or energy plants is one of great importance. Energy plants could be of interest especially when they do not compete with food and feed plants, as well as when they put into value the marginal lands or they are using the periods between crop cycles. One of the most important energy plants with a significant use in the present is maize. The aim of this paper is to present the biomass yield at maize in the specific conditions from South Romania, this being of interest to be used as raw material for producing biogas, but also for other purposes (i.e. pellets or fodder). Because one of the conditions to produce crop biomass in an efficient way is the use of the most appropriate cultivation techniques, our researches were performed under different sowing techniques at different maize hybrids, respectively different row spacing (75 cm, 50 cm,and twin-rows of 45/75 cm) and different plant population (60,000, 70,000 and 80,000 plants per hectare). Researches were carried out in the year 2013 in field experiments located in two places in South Romania, respectively at Fundulea, Calarasi County (chernozem soil), and Moara Domneasca, Ilfov County (reddish preluvosoil). The biomass determinations were realized in the early dough-dough plant growth stage and at fully ripe stage of maize plants. It was determined the above-ground biomass both as fresh and dry biomass yield per hectare. At early dough-dough plant growth stage, there was determined the total above-ground biomass, while at fully ripe stage, there was determined the total above-ground biomass without grains, respectively the above-ground biomass which is remaining as crop residues after harvesting. The fresh biomass was determined in each variant by weighing the plants from one square meter, and the dry biomass was determined by oven drying one plant from each variant.

Keywords: renewable energy, biomass, potential, sowing techniques, maize.