Enraizamento de Sequoia sempervirens (Cupressaceae) em função do padrão de miniestacas, substratos e regulador de crescimento

Ciencia Florestal

article

Mariane de Oliveira Pereira¹  Marcio Carlos Navroski¹  Alessandro Camargo Ângelo²  Gilmar Schafer³  Ramon Silveira de Andrade¹  Carolina Moraes¹  Gabriel de Souza¹ 

[1] Universidade do Estado de Santa Catarina;Universidade Federal do Paraná;Universidade Federal do Rio Grande do Sul

关键词: Gymnospermae;    Vegetative propagation of conifers;    Adventitious rooting;    IBA;    Clonal forestry;   

DOI  :  10.5902/1980509836857

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Pesquisas Florestais

【 摘 要 】

Sequoia sempervirens (sequoia) is a species known for the superior quality of its wood, making plants production by minicuttings a viable alternative. The objective of the work was to evaluate the position of collection, presence or absence of acicular leaves in minicuttings and production of plants grown on different substrates and use of IBA. Minicuttings from different clones, from a clonal minigarden, were used. For the minicuttings pattern, use a lignified portion, with medium lignification and little lignification, in the presence or absence of acicular leaves, available if a clone. Regarding substrates, the behavior of three clones and four substrates of commercial brands. For the growth regulator, was used a clone and different concentrations of IBA (0.0 to 5000 mg L-1). Minicuttings were placed to root in mini-tunnel and evaluated at 90 days. All experiments were installed in completely randomized design, with subsequent assessment of the percentage of survival; percentage of minicuttings with calluses; percentage of rooted minicuttings and number of roots emitted by rooted minicuttings. Little lignified minicuttings (apex) with acicular leaves, showed the best results for survival (96%) and rooting (94%); very lignified minicuttings without acicular leaves obtained low rooting (10%). There was considerable variation in rooting between substrates (66 to 100%) and the number of roots was more influenced by the clone used. The best results were observed in those with more organic components. The use of IBA in the minicutting was not significant for any of the variables analyzed. Minicuttings collected in apical portions and with the presence of acicular leaves are more suitable for work with a species. To select the best substrate, must be observe the clonal effect, prioritizing substrates with a more organic composition. The use of IBA did not positively influence or reduce minicuttings, it was not recommended or its use.

【 授权许可】

CC BY-NC