Report: “Greening hut residues (1968/69)”
Description
Discussion and summary:
In camps at the Ems, the suitability of this material for the protection of shaved dikes is to be tested with a foreland spilled out of smelting residues. [...] In March 1968, the experimental garden was created and observed until autumn, 1969, aslo bour two growing seasons. The results will be communicated below. [...]
If the wild plants are used as indicators of location conditions, the following can be seen: The company is very colorfully chopped together. The hailing character of the rubble area is characterised by the representatives of the rudderial societies (litoral and domestic rudderal areas) and by the plants of well-ventilated, open soils.
From the frequency, species of the natural lighter are predominant:
Festuca rubra (Rotschwindel), Agrostis alba (straw grass), Puccinellia maritima (Andel);
These three grasses only cause an estimable area coverage to be achieved. Among the four varieties of seeding, which were relatively positive, are three whose wild forms play a role in natural coastal societies (according to RAABE 1951): Festuca pratensis and the two subspecies of Festuca rubra. The former is representative of the Marschweiden Society, Festuca rubra forms the red swing grass of the foreland, but in a subspecies called F.r. litoralis. However, according to the friendly message from Professor Dr. Raabe, Kiel, it is not certain whether the separation of these subspecies is right, but it is provisionally understood below the form located at salt sites. Bromus secalinus has no relation to the coast.
As a preliminary test result, the following shall be noted: The strong grooming of both seeded grasses and wild plants characterise the fine debris of the smelting residues as hostile to vegetation. The prerequisite for the settlement of wild plants is only created by silt storage. However, the soil improvement by natural means is taking place quite slowly, as the surface with 1 m above medium tide floods is only within the range of very high floods.
Successful grass seeding on pure fine rubble is not considered possible. This would answer the actual question of the experiment. In addition, the opinion was expressed that with certain cultural measures a greening could be possible. As a minimum amount of effort, sufficient quantities of sludge must be incorporated into the surfaces before sowing. Nevertheless, even then it would be difficult to choose the right seed. Grasses that are native to the coast can only be considered, the number of which would still be limited by the conditions of the site.
Certainly, a sludge enrichment would greatly accelerate the natural self-greening and thus eliminate the need for grass seeding. Grazing would promote the emergence of a dense lawn that protects against floods. On the other hand, the loose plant society of a debris surface cannot resist during flooding.
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Tags
- begrünung-hüttenrückstände-artenzusammensetzung-nlwkn-vegetation
- emsästuar-campen