Produção doPinus taedaL. em povoamento desbastado na região dos Campos de Cima da Serra, Rio Grande do Sul

Ciencia Florestal

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