Supply shadow
The supply shade is a term used in horticulture . When cutting larger branches or major damage to trees , not only is a large damaged area or a large cut wound caused, the area below the wound is no longer supplied with assimilates from the lost branch. Assimilates can be transported in the phloem (below the bark) in addition to the main direction "downwards" and to a certain extent "sideways". However, the horizontal type of transport is relatively slow compared to the vertical type. In the case of wide cuts, the area under the wound is no longer reached by assimilates and the bark dies due to the lack of food. The slow but continuous lateral transport ensures that the area that is not supplied becomes smaller and smaller. In the ideal case, the shape of this area corresponds to a triangle standing on its apex, the name is an analogue to the slipstream .
The damage in larger wounds (from approx. 10 cm) can usually only be completely repaired by very few plants in the long term. Oaks and beeches as long-lived climax trees , for example, have a very high regenerative capacity here , while poplars , as rather short-lived pioneers , are only rarely able to close such wounds. Conifers have significantly greater problems with wound care and prefer to close these wounds with resin .
Further use
In the field of radio or telecommunications , the term is often used for an area that previously had no or no fast connections available. The valley of the unsuspecting has become particularly well known .
Individual evidence
- ↑ Examples of the expected damage
- ↑ Harro Koch, "Boerner / Koch Gehölzschnitt" 7th edition, p. 128, Ulmer, Stuttgart 1987 ISBN 3-8001-6347-0
- ↑ Extensive case work in Munich
- ↑ Archived copy ( Memento from December 25, 2015 in the Internet Archive )
- ↑ Marek Siewniak "Tree Care Today" 2nd edition, Berlin, Patzer 1988, ISBN 3-87617-073-7
- ↑ https://www.enbw.com/unternehmen/presse/pressemitteilungen/presse-detailseite_66304.html