No trabalho avaliamos a adubação orgânica, em diferentes doses, na produção de biomassa e óleo essencial (OE) de plantas Mentha suaveolens Ehrh. As doses de adubação foram aplicadas em vasos de 3L: EL-Bokashi em 10 g, 15 g e 20 g; Formulado Orgânico Mineral Natural (FOMN) em 25 g, 30 g e 35 g; e a mistura de EL-Bokaschi (15 g) + FOMN em 15 g, 20 g e 25 g. O experimento foi conduzido em DIC simples, com 9 tratamentos. Aos 80 dias após plantio realizou-se analises de crescimento e produção de OE das plantas, e submetidas ao teste Scott Knott 5 % de probabilidade. As plantas adubadas com o composto EL-Bokashi (15 g)+FOMN (15 g), e o EL-Bokashi (20 g), proporcionou maior biomassa seca das raízes e na parte aérea. As plantas adubadas com o composto EL-Bokashi (15 g) + FOMN (20 g), e com FOMN (30 g), apresentaram maior produção de OE. Recomenda-se a utilização conjugada de EL-Bokashi + FOMN para produção de biomassa e OE de hortelã peluda.
Background:The aim of this research was to investigate the efficiency of methods to overcome primary dormancy and biochemical processes associated with germination of Erythrina falcata Benth seeds. Seeds were submitted to dormancy overcoming treatments and the water uptake pattern was analysed. We then evaluated the activity of the antioxidant enzymes SOD, CAT, and APX, and quantified lipid peroxidation levels, hydrogen peroxide content and total protein content. The experiments were performed in a completely randomized design and the statistical analysis used was Scott-Knott test at 5% probability.Results: Mechanical scarification with sandpaper leads to approximately 94% of germination in E. falcata, while control non-scarified seeds show only approximately 37% of germination. Treatments with hot water led to high mortality in E. falcata seeds. Rapid water absorption was observed in the first 18 hours of imbition when the seeds were scarified with sandpaper, and radicle emergence was observed after 36 hours. During imbibition there was an increase of antioxidant enzyme activity and a decrease in lipid peroxidation and H 2 O 2 production, suggesting an efficient mechanism for regulating imbibition damage. A decrease in the total protein content was observed during germination of E. falcata seeds.Conclusions: Mechanical scarification is an efficient method for breaking dormancy of E. falcata seeds. During germination of E. falcata seeds there is a reduction in the production of H 2 O 2 and lipid peroxidation, and an increase in the activity of antioxidant enzymes. The total protein content decreased along the germination time.
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