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Type of publication: research article
Type of publication (PDB): Straipsnis konferencijos medžiagoje Clarivate Analytics Web of Science ar/ir Scopus / Article in Clarivate Analytics Web of Science or Scopus DB conference proceedings (P1a)
Field of Science: Ekologija ir aplinkotyra / Ecology and environmental sciences (N012)
Author(s): Pekarskas, Juozas
Title: Requirements and chemical composition of organic vermicompost produced in Lithuania
Is part of: Rural development 2013 : 6th international scientific conference, 28-29 November, 2013, Akademija : proceedings. Akademija : Aleksandras Stulginskis University, Vol. 6, b. 3 (2013)
Extent: p. 399-402
Date: 2013
Keywords: Organic farming;Biohumus;Chemical composition
Abstract: In the article the requirements established for the production of organic vermicompost in Lithuania are analyzed. It was found that in Lithuania organic biohumus is usually made from farmyard or horse manure with the help of earthworms Eisenia fetida or Dendrobaena veneta. Manure should be used only from small farms or farms with less than 300 livestock units. In order to obtain confirmation by the certification authority that the produced biohumus complies with EU regulations and national legislation a detailed chemical composition analysis by an accredited laboratory and scientific recommendation must be submitted. The certification authority shall verify whether all the materials contained in the vermicompost on the basis of Regulation (EC) No.889/2008 Annex I are allowed for use in organic production. If all the requirements are met the certification authority shall issue a permit to use the produced vermicompost in organic production. Examination of the chemical composition of organic vermicompost showed that it contained 43.65% of dry and 49.43% of organic matter, 24.26% of organic carbon, 4.78% of humic and 0.42% of fulvic acid, 1.67% of total nitrogen (N), 0.46% of total phosphorus (P), 1.49% of total potassium (K), 4.51% of calcium (Ca), 0.74% of magnesium (Mg), 0.56% of iron (Fe), 22.88 mg kg-1 of boron (B), 216.88 mg kg-1 of manganese (Mn), 3.23 mg kg-1 of cobalt (Co), 146.87 mg kg-1 of zinc (Zn), 1.74 mg kg-1 of molybdenum (Mo), and 20.13 mg kg-1 of copper (Cu), pH value was 7.6. Organic biohumus has been contaminated by heavy metals, the amount of cadmium (Cd) comprised 0.35 mg kg-1, Nickel (Ni) - 6.92 mg kg-1, lead (Pb) - 11.59 mg kg-1, chromium (Cr) - 7.11 mg kg-1, and Cr (VI) residues were not found
Affiliation(s): Vytauto Didžiojo universitetas
Žemės ūkio akademija
Appears in Collections:Universiteto mokslo publikacijos / University Research Publications

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