Profitability of silvicultural treatments in logging gaps in the Brazilian Amazon
2016
Hoogstra-Klein, M. A. | Bais, A. L. S. | Mohren, G. M. J. | Schwartz, G. | Peña-Claros, M. | Arts, B. J. M.
Many harvested timberspecies of tropical forests have not been regenerating sufficiently and have thus made post-harvestingsilvicultural treatments necessary. This study analysed the profitability of sawnwood produced through fourtreatments in seedlings and saplings naturally present or planted in logging gaps. The treatments were(1) standard procedures of reduced-impact logging or control, (2) tending of the naturally establishedregeneration, (3) enrichment planting 1 (EP-1) and (4) enrichment planting 2 (EP-2). In EP-1 seedlingswere planted in 2-year-old gaps keeping logging residuals inside the gap while in EP-2 seedlings were plantedin 1-year-old gaps with residuals removed. Species of EP-2 had higher financial value and growth rates thanspecies in EP-1. Growth rates of treated individuals were projected in 30 and 60 years to simulate sawnwoodproduction. With increases of 25 and 50% in growth rates, 500% in timber prices, and interest rates of 4and 6% year-1, tending and enrichment planting could profit at year 60. These silvicultural treatments, withtechnological improvements, can become even more financially profitable for forest managers and investors.
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