Responses of Eucalyptus benthamii seedlings to the application of the organic fertilizer Bacsol

Abstract

Eucalyptus benthamii is a tree species commonly planted in subtropical areas, including the Southern Brazil, due to its tolerance to low temperatures and frosts. The success of E. benthamii plantation depends on the seedlings vigor during transplantation. We hypothesized that improvement of chemical and biological properties of growth substrate would produce more vigorous E. benthamii seedlings. Thus, we applied increasing doses (0, 0.5, 1.0, 1.5 and 2.0 g per seedling) of the organic fertilizer Bacsol, which carries a consortium of potential plant growth promoting microorganisms, on the substrate, and measured the growth and development of E. benthamii seedlings. Two experiments were performed in 2011 and 2012. The first experiment included measurements in four growth stages to estimate the relative growth rates. The second one ended at the time that seedlings reached standard heights for transplantation (about ± 20 cm). Measurements on plant height, stem diameter, shoot dry weight and relative growth rates indicated that the application of Bacsol improved E. benthamii seedlings vigor and decreased the time needed in nursery, from 150 days to 90 days. The best responses occurred at doses from 1.3 g to 1.5 g per seedling. The data demonstrated that application of Bacsol in substrate is a promising technology to increase E. benthamii seedlings vigor.

Crescimento De Mudas De Canafístula Com O Uso De Adubação Biológica E Bioestimulante Em Diferentes Substratos

“…O fertilizante Bacsol® foi utilizado misturado ao substrato por Monteiro et al (2017), e proporcionou resultados positivos com a aplicação de doses de 0,5; 1,0; 1,5 e 2,0 g do produto/muda na produção de Eucalyptus benthamii aos 120 dias, sob as variáveis H, MSPA e relação H/MSPA. Ainda no mesmo estudo, o tratamento com Bacsol® promoveu para a variável H aumento no crescimento de 40 a 76% em relação à testemunha, assim como a MSPA com pesos de 89 a 169% superiores ao controle, e relação H/MSPA com índices de 28 a 41% inferiores ao controle.…”

“…Buscando a produção de mudas de forma mais sustentável, são encontrados no comércio diferentes tipos de fertilizantes orgânicos capazes de fornecer nutrientes, e alguns deles microrganismos benéficos que melhoram a qualidade do substrato. A utilização desses fertilizantes já é empregada na produção de mudas florestais e, trouxe resultados positivos na produção de mudas de Eucalyptus benthamii (MONTEIRO et al, 2017), Acacia mearnsii (HOPPE et al, 2004) e Ilex paraguariensis (HOPPE et al, 2005).…”

Rhizobial inoculation in black wattle plantation (Acacia mearnsii De Wild.) in production systems of southern Brazil

“…In fact, although several institutes have researched the diversity of rhizobia of tree legumes [17] and different techniques for inoculating microorganisms in seedlings [78,79], few investigations resulted in commercial inoculants for forest species [68]. Some inoculants for forest species are made available in the market as "organic fertilizer" and, when they are used under nursery seedlings or transplantation, e.g., [79], they are not treated as an alive product as they should [78]. Therefore, research is challenged to improve knowledge about inoculation technology as a whole.…”