Data/hora: 12/06/2024 04:45:06

Biblioteca(s): | Embrapa Milho e Sorgo.
Data corrente: | 07/08/2020
Data da última atualização: | 13/08/2020
Autoria: | ESTEVES, G. de F.; SOUZA, K. R. D. de; BRESSANIN, L. A.; ANDRADE, P. C. C.; VERONESE JÚNIOR, V.; REIS, P. E. dos; SILVA, A. B. da; MANTOVANI, J. R.; MAGALHAES, P. C.; PASQUAL, M.; SOUZA, T. C. de.
Afiliação: | Gisele de Fatima Esteves, Universidade Federal de Alfenas; Kamila Rezende Dazio de Souza, Universidade Federal de Alfenas; Leticia Aparecida Bressanin, Universidade Federal de Alfenas; Paula Cristina Castro Andrade, UNIFENAS; Valdir Veroneze Júnior, Universidade Federal de Alfenas; Pedro Ernesto dos Reis, Universidade Federal de Alfenas; Adriano Bortolotti da Silva, UNIFENAS; Jose Ricardo Mantovani, UNIFENAS; PAULO CESAR MAGALHAES, CNPMS; Moacir Pasqual, Universidade Federal de Lavras; Thiago Correa de Souza, Universidade Federal de Lavras.
Título: | Vermicompost improves maize, millet and sorghum growth in iron mine tailings.
Ano de publicação: | 2020
Fonte/Imprenta: | Journal of Environmental Management, v. 264, article 110468, 2020.
DOI: | 10.1016/j.jenvman.2020.110468
Idioma: | Inglês
Conteúdo: | The Fundao dam was designed to store iron mine tailings in the region of Mariana, MG, Brazil. When it ruptured, the tailings overflowed. These tailings affected the soil due to the formation of a thick crust as a result of drying (compaction) and hindered the natural revegetation process. In this context, the use of organic fertilizers, including vermicompost, is method of reducing the physical limitations on root growth caused by soil properties and changing soil-metal interactions. For this reason, vermicompost was added to iron mine tailings, and its morphological and physiological effects on maize, millet and sorghum plants were studied. The experiment was conducted in a greenhouse using 6 dm(3) pots. The plants were subjected to three treatments: mine tailings, mine tailings + vermicompost, and a reference soil. From the V3 stage onwards, biweekly growth, leaf gas exchange and chlorophyll fluorescence evaluations were performed. At the end of the experiment, dry biomass and metal, macro- and micronutrient contents were quantified, and the root morphology was evaluated. The tailings created physical limitations on root growth and had low nutrient content as well as high concentrations of chromium, iron and manganese. The addition of vermicompost favored increases in shoot and root dry biomass, increases in root length, volume, surface area and diameter, and the absorption of macro- and micronutrients, which was reflected in the growth of the studied species. In addition, vermicompost led to greater investment in thick and very thick roots, and in general, the plants showed no symptoms of metal toxicity. Considering the characteristics of the studied tailings, it can be concluded that vermicompost favors the growth of plant species and may be a viable method for beginning the recovery process in areas containing iron mine tailings.
Palavras-Chave: | Desastre de Mariana; Troca gasosa.
Thesagro: | Biomassa; Compactação do Solo; Lodo Residual; Morfologia Vegetal; Raiz; Resíduo.
Categoria do assunto: | --
Registro original: | Embrapa Milho e Sorgo (CNPMS)
Exemplares: | CNPMS - (29325-1) - UPC - AP - DD -  -  -  - DIS