Dosagem de sulfato por turbidimetria em solos tiomórficos

Caballero, Enrique Combatt; Álvarez, Víctor H.; Ferreira, Andrés dos Santos

doi:10.15446/acag.v63n1.31922

Cited by 3 publications

(3 citation statements)

References 5 publications

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“…In contrast, the proportions of carbon and phosphorus were measured according to Walkley and Black ( 60 ) and Bray II ( 61 ) methods, respectively. The exchangeable cations Ca 2+ -Mg 2+ -Na 2+ -K + were measured with atomic adsorption spectrophotometry (AAS) using the ammonium acetate extraction method ( 62 ), while boron and sulfur were measured by colorimetry using monocalcium phosphate extraction and by turbidimetric using monocalcium phosphate extraction ( 63 ), respectively. Fe, Mn, Cu, and Zn were measured by AAS using a diethylenetriaminepentaacetic acid (DTPA) extraction ( 64 ), and the electric conductivity was measured using an electrometric method.…”

Section: Methodsmentioning

confidence: 99%

Association between bacterial community and cadmium distribution across Colombian cacao crops

Jaramillo-Mazo,

Bravo,

Guerra Sierra

et al. 2024

Microbiol Spectr

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Assessing the bacterial community composition across cacao crops is important to understand its potential role as a modulator of cadmium (Cd) translocation to plant tissues under field conditions; Cd mobility between soil and plants is a complex and multifactorial problem that cannot be captured only by experimentation. Although microbes have been shown to metabolize and drive the speciation of Cd under controlled conditions, regardless of the link between soil bacterial community (SBC) dynamics and Cd mobilization in the rhizosphere, only a few studies have addressed the relationship between soil bacterial community composition (SBCC) and Cd content in cacao seeds (Cd seed ). Therefore, this study aimed to explore the association between SBCC and different factors influencing the distribution of Cd across cacao crop systems. This study comprised 225 samples collected across five farms, where we used an amplicon sequencing approach to characterize the bacterial community composition. The soil Cd concentration alone (Cd soil ) was a poor predictor of Cd seed . Still, we found that this relationship was more apparent when the variation within farms was controlled, suggesting a role of heterogeneity within farms in modulating Cd translocation and, thus, seed Cd content. Our results provide evidence of the link between soil bacterial communities and the distribution of Cd across Colombian cacao crops, and highlight the importance of incorporating fine-spatial-scale studies to advance the understanding of factors driving Cd uptake and accumulation in cacao plants. IMPORTANCE Cadmium (Cd) content in cacao crops is an issue that generates interest due to the commercialization of chocolate for human consumption. Several studies provided evidence about the non-biological factors involved in its translocation into the cacao plant. However, factors related to this process, including soil bacterial community composition (SBCC), still need to be addressed. It is well known that soil microbiome could impact compounds’ chemical transformation, including Cd, on the field. Here, we found the first evidence of the link between soil bacterial community composition and Cd concentration in cacao soils and seeds. It highlights the importance of including the variation of bacterial communities to assess the factors driving the Cd translocation into cacao seeds. Moreover, the results highlight the relevance of the spatial heterogeneity within and across cacao farms, influencing the variability of Cd concentrations.

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Section: Methodsmentioning

confidence: 99%

Association between bacterial community and cadmium distribution across Colombian cacao crops

Jaramillo-Mazo,

Bravo,

Guerra Sierra

et al. 2024

Microbiol Spectr

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“…We determined the exchangeable acidity (EA) with KCl 1 N (Motta, 1990) and phosphorus availability with lactate (Egner, 1941). The B was analyzed with azomectin H (Wolf, 1974), the S was determined with turbidimetry (Combatt et al, 2014), and the Fe, Mn, Cu and Zn were analyzed using the diethylene triamine-pentacetic acid (DTPA) method.…”

Section: Analysis Of Soil Samplesmentioning

confidence: 99%

“…Destructive sampling was carried out using six-month-old plants, which were dried at 70°C for 72 h and then incinerated. The incinerated material was analyzed to determine different macro and microelement values, using the following techniques: N by Kjeldahl method, P and B by colorimetry, K, Ca, Mg, Na, Fe, Mn, Cu and Zn by atomic absorption, and S by turbidimetry (Combatt et al, 2014).…”

Section: Foliar Analysis In the Different Treatmentsmentioning

confidence: 99%

Impact of dry sludges and sludge biochar on height and dry matter of Solanum lycopersicum L.

et al. 2020

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The generation of sludge as anthropic waste is a fundamental pollution problem. However, its conversion to biochar can be an alternative to conventional fertilization for its management and use in agriculture. In this research, we evaluated the effect of the application of different doses of dry sludge (DS) and biochar of pyrolyzed sludge (PS) on the height and dry matter of a tomato (Solanum lycopersicum L.) crop and the nutrient content in the substrate. The biochar was made by rapid pyrolysis, and the substrate and the dry matter of plants were analyzed by different physical and chemical methods. An evaluation of 11 treatments was carried out in allometric measurements of plants and foliar dry matter, in three replicates with two materials (DS and PS) added to the substrate at different levels. The plant height and dry weight were evaluated using an incomplete factorial design in a completely randomized arrangement by performing statistical analysis of multivariate variance. An increase in plant height and dry weight was observed when the doses of DS and PS were increased; however, there were no statistical differences between the two materials. The amount of carbon, organic matter, and Ca concentrations in the dry leaf weight were increased with the addition of DS and PS. Likewise, the use of these materials as conditioners or amendments to agricultural soil at doses of 10-15 t ha-1 may be viable and can contribute to reducing environmental externalities through the use of these anthropic waste materials.

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Growth and nutritional responses of wild and domesticated cacao genotypes to soil Cd stress

Arévalo-Hernández

Arévalo‐Gardini

Barraza

et al. 2021

Science of The Total Environment

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Dosagem de sulfato por turbidimetria em solos tiomórficos

Cited by 3 publications

References 5 publications

Association between bacterial community and cadmium distribution across Colombian cacao crops

Association between bacterial community and cadmium distribution across Colombian cacao crops

Impact of dry sludges and sludge biochar on height and dry matter of Solanum lycopersicum L.

Growth and nutritional responses of wild and domesticated cacao genotypes to soil Cd stress

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