Evaluation of renewable energy efficiency of galega biomass
2012
Balezentiene, L., Aleksandras Stulginskis Univ., Akademija, Kauno reg. (Lithuania) | Uzupis, A., Aleksandras Stulginskis Univ., Akademija, Kauno reg. (Lithuania)
The objective of this study was to quantify the environmental sustainable and renewable energy of fodder galega (Galega orientalis Lam.) at different growth stages and during vegetation period. Field trials carried out at the Research Station of Aleksandras Stulginskis University on a sandy moraine humic horizon of Calcary–Epihypogleyic Luvisol (LVg-p-w-cc). Galega crop is notable for its longevity, high overwintering peculiarities and heavy yield. Fodder galega ensure 60 - 75 t haE-1 green mass, 15 - 17 t haE -1 hay, 14.79 t haE-1 dray matter and 0.3 - 0.7 t haE-1 seed. Galega growing season lasts a long time, from early spring until late autumn. Depending on meteorological conditions its vegetation finishes in the end of October – beginning of November. Thus fodder galega is high valuable as suitable supplement for green conveyer. Galega production is characterized by low fertilizer and pesticide requirements making it a relatively benign crop environmentally. Content of crude fibre and dry matter increases with the stages of plant development and the best energy value of green mass is received in case of galega harvesting in the flowering stage. Maturation of the crop increase in crude fibre content up to 285 g kgE-1 DM, thus reducing their digestibility, but increasing energetic value output to10.79 MJ kgE-1. Therefore long-term fodder galega can be used as energetic plant producing sufficient biomass yield with high energetic value. Three-cut system at plant flowering stage guaranteed to obtain a heavy biomass yield with higher energy content. Moreover, this undemanding plant can be linked to exploited in abandoned areas of biomass production and thereby protect these areas from forest overgrowth.
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