Ciencia Florestal | |
Produção doPinus taedaL. em povoamento desbastado na região dos Campos de Cima da Serra, Rio Grande do Sul | |
Luiz Ernesto Grillo Elesbão1  | |
[1] UFSM | |
关键词: produção; desbaste seletivo; área basal; | |
DOI : 10.5902/198050982754 | |
学科分类:农业科学(综合) | |
来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais | |
【 摘 要 】
This work was carried out with the objective of studying the yield ofPinus taedaL., planted in an initial spacing of 3 x 2 m, located in Canela, Rio Grande do Sul state. The amostral population was submitted to one and two selective thinning, beyond a control sample, without thinning. The selective low thinning was conducted with reduction of the basal area to levels of 28 m 2 /ha. At age 17, the total yield of the control sample, without thinning, was 886.3 m 3 ha -1 ; with one thinning at age 11 the yield was 756.6 m 3 ha -1 , resulting in losses of yield of 14.6% compared to the control; with two selective at ages 11 and 15, the yield was 732.9 m 3 ha -1 , resulting in losses of yield in relation with the control sample, without thinning, of 17.3%. The selective thinning allowed a significant gain in diameter, up to age 17, with the execution of a selective thinning at age 11 an average diameter of 33.4 cm; with two selective thinning at ages 11 and 15 an average diameter of 33.5 cm; and an average diameter of 24.3 cm in the control sample, without thinning.
【 授权许可】
CC BY-NC
【 预 览 】
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