The biogenic macro and micro elemrnts and dynamics in the phytomass of the herb ecosystem with dominant developed on smolnitza from Sofia field
2000
Georgiev, N. (Institut po Botanika - B"lgarska Akademiya na Naukite, Sofia (Bulgaria)) | Markov, E.
There are investigated the changes of the quantities of the macrobiogenic elements N, P, Ca, Mg in kg/ha and of the microbiogenic elements Zn, Cu, Mn, Fe in mg/m2 in the green phytomass, dry mass and spread during the vegetation period. The highest quantities of macrobiogenic elements in the common phytomass (green phytomass, dry mass and spread) contained in June: N=62.97, P=7.20, K=62.09, Ca=33.44 and Mg=22.14 kg/ha. Their basic quantities almost during the whole vegetation period (May, June, July and August) are due to the supplies, containing in the green phytomass. During September and October the highest quantities N, P, K, Ca and Mg contained in the dry mass. The content of Zn, Cu, Mn, and Fe in the phytomass fractions during the 1995's vegetation periods are under the permissible concentrations of toxicity.
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