Engenharia Florestal (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/15
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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Resultados da Pesquisa
Item Eucalipto e biochar para fitoatenuação da poluição do solo por cádmio(2022-10-07) Paraizo, Taciana da Silva; Freitas, Eliane Cristina Sampaio de; Silva, Fernando Bruno Vieira da; http://lattes.cnpq.br/4818569008052606; http://lattes.cnpq.br/7525975084334972; http://lattes.cnpq.br/3371289066528888Phytoattenuation is a promising technique to mitigate the deleterious effects of heavy metals toxicity, promoting an environmentally safe management of land use with crops of economic value. The use of biochars can reduce the mobility of metals and provide improvements in soil fertility, promoting safe management in polluted environments. In this sense, the present work aimed to (i) evaluate the immobilization and compartmentalization of Cd in the soil with the application of doses of a filter cake biochar (CB); (ii) assess changes in soil fertility in response to biochar application; (iii) to evaluate the growth, mineral nutrition and Cd accumulation in two eucalyptus species (Corymbia citriodora and the hybrid Eucalyptus urograndis × Eucalyptus urophylla) cultivated in a polluted soil treated with biochar; (iv) to evaluate the amelioration of the stress caused by Cd through the physiological parameters of the plants treated with biochar; and (v) evaluate the regeneration of polluted soil quality through microbiological indicators. Two experiments were carried out sequentially: the first experiment was a sorption assay. The soil was incubated with doses of biochar (0, 2, 4, 8, 12, 16, 24 and 30% m/m) for 64 days and at the end of this period, the availability and chemical fractionation of Cd in the soil were analyzed. and chemical attributes related to soil fertility; the second experiment was carried out in a greenhouse, with two species of eucalyptus grown in pots for 65 days in soil polluted by Cd, with and without the application of 5% CB. After cultivation, the growth parameters were evaluated; the levels of N, P and Cd in the tissues of the plants; chlorophyll a fluorescence parameters and photosynthetic pigments; and biomass together with soil microbial activity. From the results obtained, it was possible to infer that (i) the filter cake biochar can be indicated as a mitigating agent of soil pollution by Cd; (ii) both eucalyptus species associated with the application of 5% BT were tolerant to Cd toxicity; (iii) the cultivation of eucalyptus with the application of biochar promoted improvements in the microbiota of the soil polluted by Cd, a sensitive indicator of environmental quality; and (iv) phytotechnology using the eucalyptus species C. citriodora and the hybrid E. urograndis × E. urophylla plus the application with 5% CB showed potential to attenuate the effects of Cd in polluted areas.Item Uso de espécies florestais na fitorremediação do solo contaminado por cádmio(2019-07-17) Veloso, Aline da Silva; Marangon, Luiz Carlos; Silva, Fernando Bruno Vieira da; http://lattes.cnpq.br/4818569008052606; http://lattes.cnpq.br/6130999923981614; http://lattes.cnpq.br/1011075155653039Cadmium (Cd) contamination of soils represents a potential risk to human and environmental health. The use of forest species as a metal phytoremediator can be an economically and ecologically sustainable choice when associated with silicate fertilization, which will alleviate metal toxicity to plants. In this sense, the study aimed to evaluate: the tolerance of two forest species (Casearia sylvestris Swartz and Machaerium aculeatum Raddi) cultivated in a soil contaminated by Cd and submitted to silicate adduction; bioaccumulation and distribution of Cd and Si, as well as changes in plant nutritional status. The experiment will be carried out in a greenhouse in a completely randomized design in a 2 x 2 factorial arrangement (two forest species: M. aculeatum and C. sylvestris; combined with 0.0 and 200.0 mg kg-1 Si). with three repetitions. The soil used in the experiment was collected at a depth of 0.0 - 0.2 m and characterized chemically and physically. The soils were weighed 9 kg for each pot. Soil contamination was induced with CdCl2.H2O above 10.0 mg kg. Subsequently, they were treated with Si as calcium silicate and then a seedling of each species was transplanted to each pot. The experiment was collected after four months of transplantation. The seedlings were collected and separated in shoots and roots; soil samples were also collected. Soils and plants were extracted and the contents of Cd and Si were determined; In the vegetal tissues the contents of N, P, K, Ca and Mg were determined. The results were submitted to descriptive statistical analysis, ANOVA (one way p <0.05) and Tukey test (p <0.05). The results showed that M. aculeatum presented better tolerance to Cd and when associated with Si obtained higher root biomass and better nutritional status, as well as Si influenced the translocation of Cd to shoot. Although Cd bioaccumulation was more significant in C. syvestris, its development was affected by biomass loss and poorer nutritional status. The distribution of Cd in both species presented the highest concentration in the root. Evaluating the best yield and biomass results, tolerance and nutritional status, M.aculeatum demonstrated potential as a phytostabilizer of cadmium contaminated soil.