Peat substitution in seedling production – development and implementation of local green compost-based growing media
The use of peat-based growing media has become a practice that needs to be replaced due to the depletion of peat bogs, which have an extremely fragile ecosystem. In recent years, research on peat replacement has become increasingly important at international level.
Our aim is to establish the scientific basis for the application of green composts in seedling production, with a main focus on a specific type of green compost, leaf mould (leaf compost), as a propagation and seedling medium. Green composts from different sources are also being tested as growing media for several vegetable species. The leaf mould-focused experiment includes using foliage of different tree species, where leaf composts are left to mature for at least 12 months. Leaf compost and green compost-based media will also be tested in different mixing ratios in nurseries, and their evaluation will be complemented by laboratory tests. Among our data collection methods, special attention is given to the citizen science approach.
Activities
1. Testing green composts from different sources for the seedling production of different vegetable crops
Green composts from professional composting plants for seedling production of several vegetable plant species (tomatoes, lettuce, cabbage).
2. Setting up a leaf compost experiment using foliage from different tree species
Testing of composts made from the leaves of different deciduous tree species (e.g. walnut, ash, maple) in seedling production. We will investigate whether different results in compost quality (physical and chemical properties) and success in seedling production can be expected when compost is made from leaves of different tree species.
3. Testing leaf mould and green composts in different mixing ratios for seedling production.
Our experiments aim to produce and test seedling and propagation media for product development.
Expected results
Green compost is a sustainable, valuable material that supports the natural nutrient cycle, can be successfully applied in a wide range of horticultural practices and can also reduce operational costs in the long run. We expect that our research will support the successful application of composts in seedling production, thus supporting horticultural sustainability practices and the complete elimination of peat from growing media.
Our experiments provide information on the quality of available green composts, their availability, and possible uses. We can compare the composts (based on maturity and production method) and draw conclusions on which combination of maturity and technology results in the best quality. As a result of our work, we will be able to give recommendations to farmers on the production and use of composts, thus promoting the domestic practice of compost-based nutrient supplementation. Publications, practical guides and scientific articles on the subject will be released.
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