Dalbergia nigra (Vell.) grown using hydrogel planting methods in the establishment of a silvopastoral system in a degraded soil

  • Carlos Henrique Rodrigues de Oliveira Coordenadoria de Licenciatura em Ciências Biológicas. Instituto Federal do Espírito Santo (IFES – Campus de Alegre), Rodovia ES-482, Km 72, CEP: 29500-000, Alegre, ES, Brazil.
  • Robert Gomes Departamento de Ciências Florestais e da Madeira. Universidade Federal do Espírito Santo (UFES), Avenida Governador Lindemberg, n° 316, CEP: 29550-000, Jerônimo Monteiro, ES, Brazil.
  • Fabricia Benda de Oliveira Departamento de Geologia. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, CEP: 29500-000, Alegre, ES, Brazil.
  • Jacyelli Sgranci Angelos Programa de Pós-graduação em Agroquímica. Universidade Federal do Espírito Santo (UFES), Alto Universitário, s/n, CEP: 29500-000, Alegre, ES, Brazil.
  • Maurício Lima Dan Centro de Pesquisa, Desenvolvimento e Inovação Sul. Instituto Capixaba de Pesquisa, Assistência Técnica e Extensão Rural (INCAPER), Rodovia João Domingos Zago, Km 2,5, CEP: 29323-000, Cachoeiro de Itapemirim, ES, Brazil.


This work tested the use of a superabsorbent polymer (hydrogel) in a silvopastoral system with Brazilian-rosewood (Dalbergia nigra (Vell.) Allemão ex Benth.) in a degraded pasture area. The experimental site is part of the Bananal do Norte experimental farm, Cachoeiro de Itapemirim, Espírito Santo, Brazil. Over 480 seedlings were planted and submitted to the treatments: Dry hydrogel (DRY); Hydrated hydrogel around the root ball (HAR); Hydrated hydrogel mixed with soil (HMS); and water only (WAT). The design was in randomized blocks, with three repetitions. The tested variables were plant survival, height and root collar diameter until 672 days after planting, soil moisture at 93 days after planting and total biomass and leaf chemical analysis at 184 days after planting. Survival was positively influenced by the application of the hydrogel, but there was little or no effect regarding the application method. The hydrogel and its application techniques did not alter growth in height and root collar diameter. The polymer did not influence the development in biomass and nutritional content of the leaves, but did influence the biomass distribution. The use of the superabsorbent polymer was therefore not effective in accelerating plant growth and anticipating the stages in the implantation of the silvopastoral system.

Keywords: agroforestry, brazilian-rosewood, degraded pasture.