2.3. Seedings with a Protection Against Atmospheric Exposure - Mulch Seedings
By applying a mulch layer from organic fibres in connection with hydroseeding, seeds and seedlings will be protected against climatic influences like strong wind, drought and frost. This perceptibly accelerates and supports both, the germination procedure and the vegetation growth. Just with seedings at critical dates threatened by droughts (summer) or early and late frosts (early spring, late autumn), mulch layers are indispensable. Grove seedings without appropriate mulch layers principally are not promising. The mulch cover is slowly decomposed microbially, and thus, activates life in the soil.
Organic fibres like straw, hay, wood fibers, cellulose and cotton serve as means for mulching. Mulch layers generally are applied in a second process step after seeding and are fixed with a suitable soil binder. The two application passes guarantee that the seeds actually are placed under the protecting mulch cover:
1. Hydraulic application of the seeds in combination with the required additives.
2. Hydraulic or dry application of the mulch layer, which is fixed to the soil surface by specific soil binders (tackifiers).