Composted Solid Digestate and Vineyard Winter Prunings Partially Replace Peat in Growing Substrates for Micropropagated Highbush Blueberry in the Nursery

The “soilless” cultivation of blueberry (Vaccinium corymbosum L.) in containers with peat as substrate allows overcoming the problem unsuitable soils, thus enhancing spread this crop new areas. Since use presents several critical environmental and economic sustainability issues, evaluation alternative solutions is required. effectiveness compost produced solid digestate residues from vine-wine chain to replace part was therefore tested. Micropropagated plants cultivar Duke grown three substrates consisting a mixture commercial fractions (10, 20, 40%) were compared 100% unfertilized or fertilized (0.3 g Osmocote per pot). Plant height did not significantly differ between five theses at end trial, whereas total number nodes plant higher than control theses, due greater development secondary shoots. nutritional status plants, monitored Dualex, during growing season, generally different innovative alone. In mid-summer showed best nitrogen balance index (NBI values). Plants cultivated medium-high percentages (20–40%) lower degree defoliation dependent on slower decline vegetative activity. final destructive measures fresh dry weight biomass its partitioning roots shoots highlight that negatively affect production biomass, but rather, highest (20–40%), root stimulated.