Properties of organic compost from vineyard pruning residues and wine lees and evaluation when used in substrates for grapevine saplings under various irrigation treatments
Wineries and grapevine cultivation produce large quantities of organic wastes which through composting could be converted to organic soil improver. The present study aimed to assess the effect of a mixture of peat and perlite 1:1 with 10% organic compost (vineyard pruning residues and wine lees) in two initial C:N ratios. The composting process of vineyard pruning residues and wine lees lasted 75 days in rotting boxes and compost tumblers with self-aeration while urea 46% N and ammonium nitrate 33.5% N were added for achieving the two initial C:N ratios. The experiment was carried out in a glasshouse in a completely randomized design with 3 replications and 9 treatments. The treatments included mixtures of peat and perlite 1:1 with 10% organic compost, use of treated and untreated wine less, application of two initial ratios of C:N (30:1 and 10:1) and two irrigation regimes (85 and 100% of ETc). The main chemical characteristics of organic compost were measured both through the whole composting process. Physical properties of the final mixture were also determined. Plant growth parameters, yield, leaves nutrients, leaf area and plant chlorophyll content were measured. Proline determination for plant abiotic stress tolerance was carried out. The results showed significant increases in the measured plant growth parameters of all compost treatments relative to the control treatment. The use in the compost of the quantity of untreated wine lees that was tested, does not affect the sapling growth. The 85% ETc irrigation treatment appeared to affect the plant chlorophyll content and the leaf area of saplings. The conclusion is that vineyard pruning residues along with wine lees can be used for compost production and promote grapevine saplings growth under glasshouse conditions.
Lampraki, E., Baltzoi, P., Patakioutas, G., Tsirogiannis, I., Mantzos, N., Kyrkas, D., Hela, D., Malamos, N. and Gizas, G. (2023). Properties of organic compost from vineyard pruning residues and wine lees and evaluation when used in substrates for grapevine saplings under various irrigation treatments. Acta Hortic. 1375, 1-8
Vitis vinifera, composting, C:N ratio, growing media, growth parameters