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Testing peat-free growing media based on olive wood residues for olive saplings

Kir, Alev; Løes, Anne-Kristin; Cetinel, Barbaros; Turan, Hatice Sevim; Aydogdu, Erol; Pecenka, Ralf; Dittrich, Christian; Caceres, Rafaela; Lennartsson, Margi; Rayns, Francis; Conroy, Judith and Schmutz, Ulrich (2021) Testing peat-free growing media based on olive wood residues for olive saplings. Acta Horticultura, 1317, pp. 23-31.

[thumbnail of Kir et al Acta Hort 2021.pdf] PDF - English
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For environmental conservation, peat-based growing media are being phased-out in many countries. Peat-free alternatives need to be developed, preferably from local biomass ingredients. This paper describes the performance of peat-free substrates containing olive branch pruning materials in comparison with commercial growing media controls for olive saplings grown during April-October 2020 at the Olive
Research Institute (ORI) in Turkey. The trial was conducted using a randomized plot design with 4 replications and 4 treatments: 1) (COMP) compost made of locally
available plant materials with 70% olive prunings (100%, v v-1; 2) (FIBER) mixture of chipped and extruded olive prunings (50% chipped + 50% extruded, v v-1); 3) (SAND)
a commercial mixture(sand 90% + vermiculite 10%, v v-1) (control); and 4) (PEAT+) a commercial mixture (peat 40% + coco coir 40% + perlite20%, v v-1) (control). The
vegetative growth parameters and weed status (density and coverage) were recorded and root fungal diseases commonly found in Turkey were analyzed. After the first six
months of growth, there were statistically significant differences between the treatments (p≤0.05); COMP and PEAT+ were comparable and produced the largest plants with 100% survival rate. 98% of plants survived in SAND, and 81% in
FIBER.FIBER, which was the only treatment with no weed growth, had about 30% reduced growth as compared to SAND, which had 90 and 78% growth compared with PEAT+ and COMP. Still, it was remarkable that it was possible to grow olive saplings in treated olive prunings. It is very promising that a peat-free growing media like COMP
performed as well as the commercial growing media with 40% peat. During the extrusion of olive material, the temperature rose to ca. 120°C and during composting
the COMP reached 65-70°C; temperatures at which the materials are expected to be effectively sanatised from any fungal diseases.

EPrint Type:Journal paper
Keywords:compost, wood fiber, extrusion, olive young tree, organic farming, Organic-PLUS, Organic-PLUSX
Agrovoc keywords:
growing media
Subjects: Crop husbandry > Composting and manuring
Crop husbandry > Breeding, genetics and propagation
Crop husbandry > Crop health, quality, protection
Values, standards and certification > Evaluation of inputs
Research affiliation: European Union > Horizon 2020 > Organic-PLUS
Turkey > Olive Research Institute
Spain > IRTA (Instituto de Investigación y Tecnología Agroalimentarias de Cataluña)
Norway > NORSØK - Norwegian Centre for Organic Agriculture
UK > Univ. Coventry
Horizon Europe or H2020 Grant Agreement Number:774340
DOI:DOI 10.17660/ActaHortic.2021.1317.4
Deposited By: Løes, Anne-Kristin
ID Code:42946
Deposited On:04 Nov 2022 16:14
Last Modified:04 Nov 2022 16:14
Document Language:English
Refereed:Peer-reviewed and accepted

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