Wiara de Assis GomesSilva, Luciano Henrique Pereira da2025-07-162025-07-162025-07-03Silva, Luciano Henrique Pereira da. Polímero hidrorretentor na produção de mudas de amora preta (Rubus spp). Orientador: Wiara de Assis Gomes. 2025. 30 f. 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/123456789/64385The objective was to analyze the performance of a water-retaining polymer in black mulberry (Rubus spp.) seedlings propagated by cuttings, in some of their vegetative parameters, for a given period. The experimental research was developed at the Jundiaí Agricultural School (EAJ). Five treatments with different doses of the water-retaining polymer were used: T1: control (dose 0.0), T2: 3.0 g/L, T3: 6.0 g/L, T4: 9.0 g/L, and T5: 12.0 g/L. All treatments were prepared with substrates (soil, sand, and organic compost) for vegetative propagation. The black mulberry cuttings that served as seedlings were collected from a mother plant at the Jundiaí Agricultural School. The seedlings remained in the experiment for 70 days. The variables evaluated were the number of surviving seedlings, shoot length, shoot diameter, number of leaves produced on the shoots, root length, root volume, and quantification of fresh and dry weights of both the shoot and root system. All analyses were performed using Tukey's test. There was no statistical difference between treatments for any of the variables (shoot length, shoot diameter, number of leaves produced on the shoots, root length, root volume, and quantification of fresh and dry matter of the shoots). However, there was a significant difference in fresh and dry matter production of roots in treatment T5: 12.0 g/L (lowest production). Thus, the control doses of 0.0 g/L; 3.0 g/L; 6.0 g/L; and 9.0 g/L, corresponding to treatments T1, T2, T3, and T4, respectively, tend to be better because they were more equivalent, considering that these treatments produced better quantitative results regarding root production. Therefore, it is understood that, for practical purposes and according to the results obtained in this research, it is positive for seedling producers to work with doses up to 9.0 g/L of the water retaining polymer, considering that doses higher than this could cause production losses.pt-BRPropagação vegetativaDosesRaízesEstaquia.bachelorThesis