DIGITALNA ARHIVA ŠUMARSKOG LISTA
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| ŠUMARSKI LIST 1-2/2006 str. 21 <-- 21 --> PDF |
J. Zelić: UTJECAJ INTENZITETA PROREDA NA VRIJEDNOST ETATA U STARIJOJ BUKOVOJ ... The equaling distribution of volumes per thickness degrees is shown in Graph 1. The structure of asortiments in gross volume per hectare on plots 1. and 2. differentiates as well (Table 4, Graph 2). The value of asortiments in gross volume per hectare shown on Table 5. and Graph 3. It can be concluded that value of wood asortiments per hectare is 8,80 % higher on plot 1, than on plot 2. The research presents a method of calulation of forest interest rate of regular beech stands, that 85 years of age. The basic formula for calculation the current felling value of stands per hectare or volume is: Cn = C0 * 1,0 p n, . The current felling value of regular beech stands per hectare is: Cn = 121113,03 kn/ha,(300,23 kn/m3) for plot 1. and, Cn = 111316,29 kn/ha ( 279,85 kn/m3) for plot 2. The legal standard for biological reproduction is 23 % of actual price of wood assortiments (fcco forest depot). In this case the standards for biological reproduction equals with the costs of establishing forest stands, (C0): C0 = 27856,00 kn/ha, (69,05 kn/m3) for plot 1, C0 = 25602,75 kn/ha (64,36 kn/m3) for plot 2. 6 kn The forest interest rate (p) i iis one parameters in the function: The forest s interest rate is: p = 1,74 %. The price of stem wood ( forest annuity) is calculated using Barth’s formula: Šn = ( Cn / 1,0 pn) – En En, in Barth’s formula represents total costs of exploitation (fco forest depot). The calculated forest annuities (the price of stem wood ) are: Šn = 61,79 kn/m3, for plot 1 and, Šn = 46,43 kn/m3, for plot 2. The price of stem wood (forest annuity) like indicator of menagement economic efficacy is 33,08 % higher on plot 1, than on plot 2. The point of proftability or break-even point (TPn) is 70,40 years for plot 1 and 73,34 years for plot 2 in department 63a, m.u.“South Papuk”. It was affirmed that management economic efficacy of beech stands under mentioned condicions is after 2/3 of beech maturity (100 yeas). Key words: Unmixed regular beech forest, intesivelly thinning, normals, beta-function, breast height diameter distribution, the asymmetry and flatness coefficients asortiment structure, value of wood assortiments, current felling gg values, forest interest rate (forest annuity), price of stem wood, the point o oof ff proftability (break-even point). Šumarski list br. 1–2, CXXX (2006), 9-19 |