DIGITALNA ARHIVA ŠUMARSKOG LISTA
prilagođeno pretraživanje po punom tekstu
| ŠUMARSKI LIST 3-4/2003 str. 39 <-- 39 --> PDF |
R. Križanec: NOVE INAČICE VREMENSKOG UREĐIVANJA ŠUMA PREBORNOG UZGOJNOG OBLIKA Šumarski list br. 3-4, CXXV11 (2003), 109-133 yield by purpose and form was set up, which is identical to Masson-Wattier´s formula for the entire yield in a high regular forest: E= mi (Križanec) E= m3 (Masson-Wattier) 9TS However, the denominator contains a variant of the management component "time" (9Ts), adapted to the system, permanent development and age heterogeneity of selection stands. A nine-fold average transition time for a stand as a whole (9Ts) is a counterpart to rotation in a high regular forest. It defines a new time constant: fictional rotation or management conversion period applicable to managing selection forests (u = 9Ts). With regard to their scientific origin and simple form, the new yield formula and fictional rotation are in practice easily incorporated in the existing forest management models. Being effective signs of cutting maturity, we propose their use for the calculation and control of account and yield realisation in all units of spatial division of selection forests Key words: selection forest, time management, transition time, cycle, thinning, period, mid- and long-term planning, fictional rotation, yield. |