Efeitos econômicos de diferentes programas de desbaste em povoamentos de pinus elliottii
The effect of different thinning programs (light thinning, medium and heavy thinning) on the internal rate of return was studied in stands of Pinus elliottii. The sampled stands were planted in 1976 with an inicial spacing of 2 x 2 m. Thinning intensity was expressed by the stand density index of...
| Main Authors: | , |
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| Format: | Article |
| Language: | Portuguese |
| Published: |
Universidade Federal de Santa Maria
2000-01-01
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| Series: | Ciência Florestal |
| Online Access: | http://www.redalyc.org/articulo.oa?id=53400102 |
| Summary: | The effect of different thinning programs (light thinning, medium and heavy thinning) on the
internal rate of return was studied in stands of Pinus elliottii. The sampled stands were planted in
1976 with an inicial spacing of 2 x 2 m. Thinning intensity was expressed by the stand density index
of Reinecke (SDI). Thinned volume was determined using the assortment tables of
SCHNEIDER & OESTEN (1991) and costs/prices of the year 1998 of the Association of Forest
Enterprises of Rio Grande do Sul (AGEFLOR). The highest internal rate of return was obtained with
a light thinning with a rotation length of 15 years and an initial density of 2500 trees. The lowest
internal rate of return resulted from a light thinning, but in 45 years and with an initial density of
1500 trees. In general, the internal rate of return diminished with increasing rotation length. A sensitivity analysis showed that timber price was the most sensitive variable to influence
profitability. |
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| ISSN: | 0103-9954 1980-5098 |