Crown closure degree
In forestry , the degree of crown closure is a measure of the stand density or the area occupied by the trees in a forest . It thus represents an important parameter in relation to logging operations planning , the Forest Management Plan . In addition, it is a useful parameter for silvicultural measures and environmental conditions.
Significance and gradations
In particular, the degree of crown closure provides information on the urgency of thinning and the supply of light to the forest floor. This is relevant for forestry when initiating rejuvenation measures. If information is available about the time and the strength of the last maintenance intervention, the given ability to react, especially of the Z-trees to exemption measures, can be derived from the assessment of the crown closure .
The degree of crown closure is given in the evaluation of aerial photographs ocularly or with the help of a dot matrix in percent or in tenths. In forest management practice, this size is usually estimated terrestrially and ocularly by the forest manager. In the verbal description of the stock, one differentiates between the following grades:
| Final degree | property |
|---|---|
| pushed | The crowns interlock deeply |
| closed | The crowns touch the branch tips, the crown closure is achieved |
| relaxed | The crown distance is smaller than the width of the crown |
| light | The crown distance corresponds to a crown width |
| spacious, spacious | The crown distance exceeds a crown width |
One speaks of a "gaping" crown closure when a stand is largely closed, but has interruptions of at least one crown width in a few places.
literature
Horst Kramer , Alparslan Akça: Guide to forest measurement . 3rd, expanded edition. Sauerländer, Frankfurt am Main 1995, ISBN 3-7939-0830-5
Individual evidence
- ↑ a b Horst Kramer , Alparslan Akça: Guide to forest measurement . 3rd, expanded edition. Sauerländer, Frankfurt am Main 1995, ISBN 3-7939-0830-5 , pages 150, 210.