Efeito de diferentes formas de aplicação de trichoderma na produção de mudas de couve de bruxelas

Abstract

Brussels sprouts belong to the Brassicaceae family, one of Brazil's most cultivated vegetable families. This variety in particular has little expressiveness of production and trade in the country, although it has the potential to be exploited mainly in the South region, for being able to adapt to the climate because it is frost resistant, and can benefit from this. The product of economic interest is the buds, known as cabbages. For its cultivation, it is necessary to have quality seedlings, a factor that can be influenced by the use of bioproducts that are a sustainable alternative and are increasingly present in agriculture. One example is Trichoderma, a genus of fungi considered to be a growth promoter that can contribute to increasing the quality and vigor of seedlings. The objective of the work was to evaluate the effect of different forms of application of Trichoderma in the production of Brussels sprouts. The treatments used were: control (witness), treatment with Trichoderma in the seeds, and application of Trichoderma syrup in the substrate (both with a concentration of 5 g/L). The seeds were treated in the laboratory of the Universidade Federal da Fronteira Sul, campus Chapecó-SC and the experiment was performed on a rural property, in Jardinópolis-SC. The results obtained in the evaluations were submitted to variance analysis and comparison of means by the Tukey test (p<0.05) in the SISVAR® statistical program. Regression analysis was also performed to evaluate the growth for each treatment. In the evaluations, there were no significant results for the treatments regarding seedling emergence, number of leaves, and root length. As for the growth of the aerial part, the treatments in the seed and the substrate promoted greater growth at 28 days after sowing (DAS). It is possible to conclude that the application of Trichoderma, via seed treatment or by syrup application in the substrate, does not promote gains in the emergence of seedlings, in the number of leaves and roots of Brussels sprouts plants. However, the application of Trichoderma, via seed treatment and/or syrup application in the substrate promotes greater growth of the aerial part of seedlings, at 28 DAS.