Serbia is one of the centers of genetic diversity of indigenous fruit species in natural habitats, with more than 100 species. Many wild relatives of cultivated woody fruit species can be used as rootstocks for large-scale production directed toward various applications (Mratinić and Fotirić Aksić, 2019), including the production of biomass. As a renewable source of energy, biomass has to find its proper place, whereas sustainable land management must provide a permanent and stable source of renewable energy (Hadrović et al., 2019).
The element of biomass that largely determines the energy released during oxidation is carbon (C) (Hartmann, 2014). The C content of biomass is usually 45% to 50% (by oven-dried mass) (Schlesinger, 1991), but this content may vary depending on the species and other factors. Given that selection of species for planting should focus not only on the species that favor the given site conditions, but also on the ones that have greater C storage capacity, the results of an investigation of the most suitable species for biomass production could make a significant contribution to science and practice (Hadrović et al., 2019). In addition, low nitrogen (N) availability is a major limiting factor for plant growth and development. Uptake, assimilation, storage, and remobilization of N are key processes in the economy of this essential nutrient, and its efficient metabolic use largely determines vascular development, plant productivity, and biomass production (Cánovas et al., 2018). The content of organically bound N in biomass is also important because it is related to nitrogen oxide emissions that result after combustion.
Numerous studies on the amount of C in forest biomass have been conducted in the past few decades (e.g., Vachnadze et al., 2016), including several local investigations (e.g., Koprivica et al., 2013). However, the biomass C and N content in woody fruit species has remained insufficiently investigated, although it was studied by others (Bunbury, 1923; Freeman and Peterson, 1941). Hence, our study aims to develop a strategy for the selection of woody fruit species based on their capacity for C and N storage.
AOAC International 2006 Method 972.43: Microchemical determination of carbon, hydrogen, and nitrogen: Automated method 5 6 Official methods of analysis of AOAC International 18th ed AOAC International Gaithersburg, MD
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Mratinić, E. & Fotirić Aksić, M. 2019 The distribution of wild fruit species in Serbia Lambert Academic Publishing Saarbrücken, Germany
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