EVALUATION OF COMPOSTED WINERY WASTES REUSED AS FERTILIZER

References: 14th International Multidisciplinary Scientific GeoConference SGEM 2014, www.sgem.org, SGEM2014 Conference Proceedings, ISBN 978-619-7105-16-2 / ISSN 1314-2704, June 19-25, 2014, Book 4, Vol. 2, 87-94 pp

ABSTRACT
Nowadays, there is a growing interest in the exploitation of the residues generated by
wine industry. Increasing demand for materials used as substrates in horticulture have
led to the search of new high quality and low cost ones. As a result of the above
mentioned, this research deals with the study of 4 variants of substrate composed from forestry compost (FC), leaves compost (LC), peat (P) in equal quantities and grape marc compost (GM) in different volumetric ratio proportions with emphasis on nutrients availability. These were percolated on columns with distilled water and Coïc nutritive solution in order to establish the cation exchange, retention and release of ions that occur after irrigation or fertilization with nutritive solutions. The agrochemical
characteristics of substrates (pH, EC, soluble forms of main nutrients) were analyzed in the substrates. The exchangeable forms of nutrients were determined in CH3COONH4 0.5M, pH=4.65, 1:3 v/v ratio. High potassium, calcium and magnesium levels have been identified in grape marc composts and this feature has received particular attention in our research.

Keywords: grape marc compost, substrate, cation exchange.