Gomes, Wiara de AssisSouza, Iranilson dos Santos2025-07-152025-07-152025-07-02Souza, Iranilson dos Santos. Composição de substrato no desenvolvimento de mudas de amora preta (Morus nigra). 2025. 37f. Trabalho de Conclusão de Curso (Graduação em Engenharia Agronômica)-Unidade Acadêmica Especializada em Ciências Agrárias, Universidade Federal do Rio Grande do Norte, Macaíba, 2025.https://repositorio.ufrn.br/handle/123456789/64354Black mulberry (Morus nigra) has stood out among temperate-climate fruit species; however, the seedling production phase remains a crucial factor. Thus, selecting accessible and low-cost substrate formulations becomes essential for proper seedling development. This study aimed to evaluate the influence of different substrate compositions on the development of black mulberry seedlings propagated by cuttings. The experiment was conducted in a completely randomized design with four treatments and three replications, using six plants per replication, totaling 12 experimental units. The treatments consisted of the following substrate compositions: S1 = 50% sand + 50% soil (control); S2 = 30% compost + 35% sand + 35% soil; S3 = 40% compost + 30% sand + 30% soil; and S4 = 50% compost + 25% sand + 25% soil. Semi-hardwood cuttings measuring 15 to 20 cm in length and 4 to 6 mm in diameter were used, each containing four buds—two allocated for rooting and two for shoot development. After 75 days, the following variables were evaluated: average shoot length (cm), root dry mass (g), root fresh mass (g), shoot dry mass (g), shoot fresh mass (g), main root length (cm), and root volume (cm³). Among treatments, substrate S4, with the highest proportion of organic matter, yielded the best results for most variables, including shoot length, root and shoot biomass, root volume, and main root length. Therefore, the use of organic compost in balanced substrate formulations proves to be an efficient, low-cost, and environmentally sustainable alternative for black mulberry seedling production, especially for small farmers working within agroecological or organic systems, contributing to the establishment of more vigorous and productive plants in the field.pt-BRAttribution 3.0 Brazilhttp://creativecommons.org/licenses/by/3.0/br/EstaquiaEnraizamentoComposto OrgânicoManejo SustentávelAdubação OrgânicaMorus nigraseedling propagationorganic compostvegetative propagationsubstrate formulationbachelorThesis