Joint International Conference on Long-term Experiments ...

- distribution after break case 2
y = ( ) ( ) 1281 , 2
0706 , 1 2
10, 3337 × 10 x − 7 43 − x
- distribution after break case 3
y = ( ) ( ) 3354 , 2
0882 , 1 2
2, 9207 × 10 x − 7 49 − x
in which x represents the diameter categories and y the number of trees corresponding
to each diameter category.
Numar de arbori (buc)
Distributia experimentala, distributia dupa
simularea interventiei si ajustarea acestora dupa
distributia normala, Charlier tip A,Beta
20
18
16
14
12
10
8
6
4
2
0
d8
d12
d16
d20
d24
d28
d32
Distrib exp.
Categorii de diametre (cm)
Distrib. Sim interv..(ni) ni distrib. Norm.
ni Charlier tip A ni Beta
Image 2 – Experimental distribution, the distribution after the simulation of the
break and the adjusting after the normal law, Charlier type A and Beta, case 2
4. CONCLUSIONS
From the converted data in the mixed stands of beech with sessile oak there are
interesting aspects in relation to both the interspecific competition between the two
species and between these and the common hornbeam, the lime-tree and other species
of mixed hardwood. In order to develop the stand according to the management, aims
established through a working-plan, the silvotechnical breaks will follow the change in
the composition and structure of the stands in the direction given by the established
social-economical and ecological objectives.
The pattern for the evaluation and the simulation of the break in a stand has the
advantages that, before the break is performed, information related to the tree number
structure, the basic area, volume, species proportion, Hart-Becking coefficient values is
available, which allows for the possibility of analysing and improving of the break
according to the objectives established by the management plan.
507
d36
d40
d44
d48
d52
d56