Organic compounds in root exudates of Miscanthus x Giganteus Greef et Deu and limitation of microorganisms in its rhizosphere by nutrients
2010
Kanova, H.,Mendelova Univ., Brno (Czech Republic). Ustav Geologie a Pedologie | Carre, J.,Universite Paul Verlaine Metz, Thionville Yutz (France) | Vranova, V.,Mendelova Univ., Brno (Czech Republic). Ustav Geologie a Pedologie | Rejsek, K.,Mendelova Univ., Brno (Czech Republic). Ustav Geologie a Pedologie | Formanek, P.,Mendelova Univ., Brno (Czech Republic). Ustav Geologie a Pedologie
This study was conducted to determine the composition of sugars and organic acids in root exudates of Miscanthus x Giganteus and to find out if microorganisms of the rhizospheric soil are limited by mineral nutrients. The following sugars and organic acids were determined in root exudates of this plant: glucose, saccharose, and acids such as succinic, propionic, citric, tartaric, malic, oxalic, ascorbic, acetic and fumaric. Respiration of soil from rhizosphere of Miscanthus x Giganteus was found to be limited by N, K and Ca. The respiration rate after applying mineral compounds increased in the following order: nitrate more than calcium more than potassium more than ammonium, giving approx. 165, 99, 52 and 31 % increase in comparison with controls.
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