Abstract
Traditional crop varieties are adapted to low inputs of fertilizers, pesticides, and water. In addition, biofuel from local vegetal biomass stimulates the economy in depressed rural areas. Biofuels also contribute to the reduction of greenhouse gas emissions. Here, we tested the suitability of traditional maize varieties as solid biofuel. We cultivated traditional maize varieties without pesticides and irrigation. Four varieties were cropped in two locations, with two fertilization levels, and harvested at three different dates. For each trait, we measured the heating value, the ash content, and the elemental composition. Results show that plants harvested at physiological maturity, 150 days after sowing, have about 10 % more biomass and 20–30 % less ash, N, K, and Cl than plants harvested 115 days after sowing. Moreover, reducing standard N input by 40 % did not reduce the biomass yield. Calculations show that traditional maize varieties can produce an energy of 15–23 · 104 MJ/ha. These findings demonstrate that traditional maize cultivation can be optimized to increase the efficiency of biomass production and to reduce the environmental impact.
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Acknowledgments
This work was supported by Cespa S.A. (Spanish company working on waste management and biomass-to-energy conversion), the Castilla-La Mancha Government (project POII10-0128-1789), and the Xunta de Galicia (through the Parga Pondal program and project 09MRU033403PR). The authors also thank INORDE for its participation in the project. B. Ordas thanks Serafin Gonzalez-Prieto for his valuable help.
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Serrano, C., Monedero, E., Portero, H. et al. Efficient biofuel production from traditional maize under low input. Agron. Sustain. Dev. 34, 561–567 (2014). https://doi.org/10.1007/s13593-013-0174-5
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DOI: https://doi.org/10.1007/s13593-013-0174-5