Growth promoters in propagation of caroba

• Autor(a) principal: Amaral, Patrícia Pinheiro
• Data de Publicação: 2017
• Outros Autores: Steffen, Gerusa Pauli Kist, Maldaner, Joseila, Missio, Evandro Luiz, Saldanha, Cleber Witt
• Tipo de documento: Artigo
• Idioma: por
• Título da fonte: Pesquisa Florestal Brasileira (Online)
• Texto Completo: https://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/1402
• topic: Jacaranda micrantha; Vermicomposting; Trichoderma; Jacaranda micrantha; Vermicompostagem; Trichoderma

The use of organic inputs, which are able of promoting plant growth, is an alternative to anticipate forest seedlings trading in nursery garden. Caroba (Jacaranda micrantha) is a native forest species from the southern of Brazil, which presents several potential uses. This study aims to analyze the efficiency of vermicompost and fungal isolates of the genus Trichoderma as growth promoters in J. micrantha seedlings. The experiment was carried out with nine substrates treatments, containing different percentages of vermicompost (0, 25 and 50%) on the control substrate (sifted soil and commercial substrate Carolina Soil® in 1:1 ratio) in the presence or absence of T. asperelloides and T. virens. We used a completely randomized design with 18 repetitions per treatment. After 90 days of seeding we determined: shoot height, leaf number, stem diameter, dry weight of shoots and roots and Dickson quality index. Significant effects on growth promotion of caroba seedlings were observed for isolated or combined application of Trichoderma sp. and vermicompost. T. asperelloides isolate was superior then T. virens in promoting J. micrantha growth. It was concluded that the use of vermicompost and both species of Trichoderma sp. promoted growth of J. micrantha seedlings, and the combined use of both biologic inputs promoted more pronounced increase in plants growth.