Hay-mulch and Heudrusch® - Methods in Practice
First of all you have to find out, which region the seed comes from. In close cooperation with the responsible authorities and local farmers, suitable donor areas are selected. The plants are harvested gently and pressed to round bales. For this, crop time and stage of maturity of the plants play an important role. If necessary, the material is dried once more and kept in an intermediate storage. The time schedule is coordinated with the builder.
The hay-mulch is chaffed with a special machine and either blown on to the vegetation areas or applied with a hydroseeder. For applying the Heudrusch®- procedure, the round bales are brought to the threshing center. Here, the seeding material is completely dried, if necessary, before it is threshed with a special procedure and bagged. The such obtained seed product can be stored easily. After passing a quality process (germination test), the Heudrusch®-material is applied by hydroseeding.
The advantage of the hay-mulch procedure is that the grain remains with the parent plant during the storage and thus may afterripen, if necessary. Additionally, also mosses, spores and microorganisms are transferred, which can accelerate the launching of a successful growth of the vegetation on raw soils without humus. However, larger amounts of biomass have to be applied as with the hay-mulch procedure almost the entire aerial biomass is transferred. This ensures immediate erosion control due to the mulch cover. The micro-climate is improved, and the drying up of the rootzone is reduced, what accelerates germination.
With the Heudrusch® - procedure, the time of the harvest is uncoupled from the time of application, as the material can be stored over a longer period; this allows high flexibility in what concerns the construction progress. Moreover, germination tests are carried out and documented, so that the optimal amount of expenditure can be defined precisely. This ensures comprehensive quality assurance and project documentation.