Inorganic Lead Concentration in Mineral Salt Commercial Mixtures for Beef Cattle in São Paulo State, Brazil

Marçal, Wilmar Sachetin; Pardo, Paulo Eduardo; Nascimento, Marcos Roberto Lopes do; Fortes, Maira Salomão

doi:10.1590/1808-1657v72p3392005

Cited by 3 publications

(1 citation statement)

References 2 publications

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“…A utilização de fontes de origem suspeita ou resíduos industriais deve ser considerada. Contaminação de sal mineral por chumbo também foi verificada em amostras comercializadas em São Paulo e Paraná, em cerca de 30 % dos produtos analisados 37 .…”

Section: Resultsunclassified

Determinação de Cd, Cr e Pb no leite e na alimentação bovina do Brasil

Gomes

Lindino

Gonçalves

et al. 2013

Rev. Inst. Adolfo Lutz

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A contaminação do leite é uma das maiores preocupações sanitárias em função de seu grande consumo pela população, e pela enorme extensão do país, o que limita a fiscalização adequada. Apesar de estudos científicos indicarem contaminação do leite com elementos traço tóxicos, não há qualquer estratégia do Estado para detecção e prevenção destes componentes no leite. O presente trabalho investigou a ocorrência de chumbo, cádmio e cromo em amostras de leite in natura e em leite processado e com o propósito de identificar possíveis fontes de contaminação. No leite in natura e no leite processado houve evidência de contaminação por estes elementos traço, muitas vezes em níveis acima do permitido pela legislação brasileira. A mais provável fonte de contaminação foi o sal mineral utilizado na alimentação bovina. Palavras-chave. elementos traço tóxicos, alimentação bovina, contaminação, leite.

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Section: Resultsunclassified

Determinação de Cd, Cr e Pb no leite e na alimentação bovina do Brasil

Gomes

Lindino

Gonçalves

et al. 2013

Rev. Inst. Adolfo Lutz

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Gneiss and steatite vermicomposted with organic residues: release of nutrients and heavy metals

Souza

Cardoso

Carvalho

et al. 2019

Int J Recycl Org Waste Agricult

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Purpose Use of silicate rock powders as fertilizer improves nutrient cycling, thus benefitting agriculture. The availability of nutrients to plants is often low, but can be increased when rock powder is vermicomposted and added. However, these powders can be rich in heavy metals, which may impair their use. We evaluated maize growth and heavy metals in plants and soil after fertilization with vermicomposted gneiss or steatite powders. Method Vermicompost was prepared with cattle manure, with or without gneiss or steatite powders. The experimental units were kept in the dark at room temperature for 70 days. Subsequently, a greenhouse experiment was carried out with maize grown in highly weathered oxisol soil and fertilized with vermicompost alone, or with gneiss or steatite powder. Results A small proportion of heavy metals was immobilized in the earthworm bodies, but did not hinder their growth. Maize growth was superior in the treatment with vermicomposted gneiss powder. The gneiss-enriched treatment contributed to increased Zn concentration in plants and may also be an alternative to Zn fertilization. High Ni and Cr concentrations in steatite powder apparently induced higher levels of these elements in plants. However, metal concentrations in the soil after cultivation in all the treatments were below acceptable limits. Conclusion Increased plant growth in gneiss-enriched vermicompost suggests the possibility of using this material to enrich vermicompost with nutrients, thus improving the chemical quality of organic fertilizer. Use of steatite powder in agriculture deserves further investigation.

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Rock Powder Can Improve Vermicompost Chemical Properties and Plant Nutrition: an On-farm Experiment

Souza

Cardoso

Carvalho

et al. 2018

Communications in Soil Science and Plant Analysis

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Together with farmers, we evaluated nutrient availability from vermicomposted gneiss powder, assessed its influence on growth promotion, nutrition and heavy metal accumulation in maize plants and the effect on soil chemical properties in the field. Three soil treatments were applied: fertilization with vermicompost with gneiss powder, fertilization with vermicompost without gneiss powder, and soil without fertilization (control), in a randomized block design with five replicates. The dry weight of shoots and the concentrations of potassium, calcium, magnesium, manganese, nickel, chrome and lead in the dry matter of maize were higher with vermicompost with gneiss powder. In the soil, the potential of hydrogen and phosphorus, potassium and calcium concentrations were higher with vermicompost with gneiss. There were no detectable levels of heavy metal wastes in the soil after the experiment. We conclude that vermicomposted gneiss powder has potential for use in agriculture as a nutrient source and can improve soil chemical properties.

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Inorganic Lead Concentration in Mineral Salt Commercial Mixtures for Beef Cattle in São Paulo State, Brazil

Cited by 3 publications

References 2 publications

Determinação de Cd, Cr e Pb no leite e na alimentação bovina do Brasil

Determinação de Cd, Cr e Pb no leite e na alimentação bovina do Brasil

Gneiss and steatite vermicomposted with organic residues: release of nutrients and heavy metals

Rock Powder Can Improve Vermicompost Chemical Properties and Plant Nutrition: an On-farm Experiment

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