Valorization of grape pomace by fertilization

Abstract

Pomace is the by-product of pressing grapes and sweet or fermented musts, the composition includes: bunches, skins, seeds and residues of must or wine not extracted during pressing. The vine annually extracts significant amounts of nutrients from the soil such as 100-150 kg / ha nitrogen, 20-50 kg / ha phosphorus and 75-250 kg / ha potassium, as well as calcium (70-100 kg), magnesium (10 -15 kg), iron (1-2 kg), boron (80-150 g), manganese (80-240 g), copper (60-120 g), zinc (100-120 g), molybdenum (2-3 g), etc. In order to enrich the soil with nutrients, it is proposed to capitalize on grape pomace used as fertilizer by fertilization.