Crescimento de mudas de mamoeiro sunrise solo cv. golden em substratos orgânicos com adição de turfa líquida

Abstract

Due to its diverse nutritional and medicinal properties, papaya has become increasingly present in terms of fresh fruit consumption. The increase in demand for the fruit has aroused the worldwide interest of researchers and fresh fruit producers in the papaya crop. Considering the high importance of seedling quality in planting systems and its high value in production, this research aimed to test different concentrations of commercial organic substrate and liquid peat dosages in the production of organic papaya seedlings. The experiment was carried out in a greenhouse at the Centro de Engenharias e Ciências Agrárias da Universidade Federal de Alagoas. Five proportions (%) of soil: commercial organic substrate (0:100, 25:75, 50:50, 75:25 and 100:0) were tested and for each one of the proportions five doses of liquid peat (0, 1, 2, 3 and 4%) were used. The experimental design used was randomized blocks with 25 treatments and three replications, with 10 plants per plot, totaling 750 plants, with 5 seedlings per treatment evaluated. The results showed that treatments without the application of liquid peat, regardless of the proportion of substrate used, showed low shoot and root growth rates. In all treatments where liquid peat was added, the seedlings showed better development than the control treatment seedlings. A positive interaction was found between peat levels and substrate proportions. The application of 2 or 3% peat in soil with 50 or 75% organic substrate showed papaya seedlings var. Golden with the highest masses of aerial part and root being recommended to produce seedlings for use in organic crops.

Keywords: Organic agriculture, Propagation, Papaya.