Mondo Macchina Nr. 1-2 - Anno 2023

TECNICA balance, thanks to the root symbiosis of nitrogen-fixing bacteria. As previously mentioned, the preparation can be supplemented with a biodegradable mulch, which helps create the best microclimate for germination, a high water-retention component, which absorbs and gradually releases water; a soil conditioner, which improves the chemical and physical conditions of the soil by promoting germination; a glue, which reduces seed translocation by environmental causes (e.g., by surface runoff) and predation by birds; and a dye, which promotes the most uniform distribution of the mixture. The adjuvants: Glues and dyes. Hence, glue is an essential element of hydroseeding as it fixes the mixture on the soil surface, preventing its leaching by runoff water and dispersion by wind. Depending on the different operating situations (especially the area's slope to be seeded), various active ingredients and concentrations are adopted, although high molecular weight water-soluble anionic polymers and/or natural polysaccharides are frequently preferred. As a matter of fact, the adhesive effectively binds to the substrate (mulch, cellulose, wood fibers, etc.) that is part of the mixture, forming a dense network that also effectively holds the seed and fertilizer in place. Conversely, dye is added to the mixture to achieve the best visibility of the treated area. For evident reasons, there is a tendency to prefer dyes contrasting with the substrate and, in any case, compatible with the landscape impact, although this is a more or less temporary effect since, in a short time, the growth of the sown species is expected. Usually, water-soluble dyes are used, also suitable for domestic and industrial detergents, containing preservatives and surfactants, with very varied pHs, from very acidic to very alkaline. Mechanization of hydroseeding. From a structural and functional point of view, mechanical equipment for performing hydroseeding is basically similar to traditional manure spreaders for field distribution of livestock manure (so-called "tokens"), thus equipped with tanks equipped with mechanical and/or hydraulic agitators, which contain and keep homogeneous the preparation, which is then distributed onsite through pumping and distribution systems, with a product throw of even several tens of meters, thanks to the considerable working pressure. Hydroseeders are coupled with tractors of different types, being able to be installed on dedicated trailers, flatbed trucks, transporters, or even in combination with agricultural tractors, either towed on the hook or carried on the 3-point hitch. Machine operation is often provided by a self-contained endothermic motor, which provides both the main pump and an additional auxiliary hydraulic pump for the remaining drives. However, when combined with a tractor, the equipment makes profitable use of the PTO as a means of operation. Self-propelled versions, installed on trailers or cargo beds, are characterized by high working capacities and acceptable operating range. They can accommodate on-board mix72 teriore pompa idraulica ausiliaria per i rimanenti azionamenti. Se abbinata ad un trattore, l’attrezzatura si avvale invece proficuamente della presa di potenza quale tramite per l’azionamento. Le versioni con motore autonomo installate su rimorchio o pianale di carico si caratterizzano per capacità di lavoro elevate e soddisfacente autonomia operativa, potendo ospitare TECNICA L’idrosemina può essere applicata vantaggiosamente anche nel vigneto, per l’inerbimento dell’interfilare Hydroseeding can also be beneficially applied in the vineyard, for inter-row grassing I serbatoi delle idroseminatrici sono realizzati generalmente in polietilene (sopra) oppure in acciaio zincato a caldo sia all’interno che all’esterno (sotto) Hydro seeder tanks are generally made of polyethylene (above) or hot-dip galvanized steel both inside and out (below)