Bioestimulante e substratos para produção antecipada de mudas de araçazeiros amarelo e vermelho (Psidium cattleyanum Sabine)

Abstract

Fruit growing is considerable portion of agribusiness, with Brazil being one of the three largest producers. The same is known as a major genetic diversity centers of wild fruit in the world. In the southern region of the country, fruit plants plays an important role, with potential for economic exploitation, which highlights those of the Myrtaceae family, such as strawberry guava. However, little is known about the species. Thus become necessary more studies, especially as the spread for future inclusion in the agricultural production system of Paraná Southwest region as well as supply the market that lacks these products. The objective of this study was to evaluate the growth and development of seedlings of yellow and red Brazilian guava trees on different substrates with exogenous application of gibberellic acid. The experiment was conducted at the Federal Technological University of Paraná Campus Dois Vizinhos. The completely randomized design, in factorial 3x4 (substrate concentration of GA 3), with four replicates of 20 plants each. Were analyzed height,% survival, volume of roots per plot, root and shoot length, plant stem diameter, number of leaves, leaf area, length, width and average chlorophyll content of three sheets. Data were subjected to analysis of variance, Duncan test and regression analysis. Using the statistical computer application Sanest [marca registrada]. We conclude that the use of the substrate (S3) mixing oxisol, sand and poultry litter associated with bio-stimulant gibberellin is recommended for the production of seedlings of araçazeiro amarelo and vermelho.