Banca de DEFESA: RAFAEL GOMES DA MOTA GONÇALVES

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RAFAEL GOMES DA MOTA GONÇALVES
DATA : 29/08/2019
HORA: 13:30
LOCAL: Sala 24 do Departamento de Solos
TÍTULO:

Transference of heavy metals from soil to vegetable crops in the Jacó microbasin, Petrópolis-RJ

PALAVRAS-CHAVES:

Contamination, Fertilizing, Soil and Plant Management, Vegetables

PÁGINAS: 97
GRANDE ÁREA: Ciências Agrárias
ÁREA: Agronomia
SUBÁREA: Ciência do Solo
ESPECIALIDADE: Química do Solo
RESUMO:

Petropolis is one of the largest producers city of leafy vegetables in the mountain region of Rio de Janeiro. The mainly produced vegetable is kale (Brassica oleracea var. Acephala). This work aimed to evaluate the contamination of soils by heavy metals (Cd, Pb, Ni, Cr, Mn, Zn, and Cu) in a kale production area; identify the factors which most contributed to the soil enrichment by these elements and the transfer to kale plants; and access plant quality based on the maximum limits allowed by ANVISA. The study was carried out in 24 kale production areas, located in Jacó, in the municipality of Petrópolis-RJ (22 ° 25'41.64 "S 43 ° 02'54.49" O). In each property, samples of soil amendments were randomly collected. Soil and plant samples were collected, following the proportion of one sample per 1000 individuals, totaling 146 samples. Soil samples were digested according to methodology 3050B (USEPA, 1996). Plant and soil amendments samples were digested by 3050 method (USEPA, 2008). The extracts were analyzed by Atomic Absorption Spectrometry, and the quality of soil and plant’s analysis were compared to certified samples. The data obtained was used to calculate the pollution indices (IP) for heavy metals (Cd, Pb, Ni, Cr, Zn, Mn, and Cu) using the reference values for the Mountain Region of Rio de Janeiro. Soil enrichment was verified for Zn, Pb, Cd, and Ni elements. Mineral and organic fertilizers were identified as the primary sources of heavy metals inputs, being the “poultry litter” the major contributor of this input. In general, the contents in the soil (total and bioavailable), the concentration in the leaves and the total accumulated in kale plants were inversely related to the relief, but directly related to the assimilable P, exchangeable K, and organic carbon contents. These relationships suggest the influence of the relief, soil management, soluble phosphate, potassium fertilizers, and poultry litter on the heavy metals accumulation in soil and kale plants. From the plants analyzed, 91.7% presented Pb contamination, with values up to 9.2 times above the limit allowed by ANVISA. Also, 97.2% of the plants presented Cd contamination, with values up to 3.8 times higher than acceptable.

MEMBROS DA BANCA:
Presidente - 387263 - NELSON MOURA BRASIL DO AMARAL SOBRINHO
Externo ao Programa - 1412091 - ERICA SOUTO ABREU LIMA
Externo à Instituição - FABIANA SOARES DOS SANTOS - UFF