Incubação Do Verdete Com Diferentes Fontes De Ácidos Para Disponibilização De Potássio, Cálcio, Magnésio Do Solo.

Silva, Adriane de Andrade; Lana, Regina Maria Quintão

doi:10.15628/holos.2015.3210

Cited by 6 publications

(5 citation statements)

References 6 publications

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“…In regard to Mg content retained in the 0-20 cm soil layer, after the irrigation events, the addition of humic acid tends to promote increment of content as from 120 L ha -1 (Figure 3A). Similarly, Silva and Lana (2015) identified increased Mg content as a function of higher application rates of humic acid, which represented an increment of 44% in the Mg present in the soil, when compared with soil where humic acid was not applied. This is an important result, considering that Cerrado soils usually present Mg deficiency (Souza & Lobato, 2004) and this effect can be minimized in soils cultivated with the use of liming treatment.…”

Section: Figurementioning

confidence: 89%

Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns

Oliveira¹,

Tavares²,

Assis³

et al. 2021

Semina: Ciênc. Agrár.

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The objective of this work was to evaluate the retention of P, K, Ca and Mg nutrients, as well as pH and electrical conductivity in Oxisols. Soil samples were placed into columns, with addition of humic substances (soil with and without liming). The experiment was conducted in a greenhouse and the columns consisted of PVC tubes with 40 cm height x 5 cm diameter. The humic substances used were humic acid and fulvic acid, applied at rates of 0, 60, 120 and 240 L ha-1, in soil with or without lime. Ten irrigation events were performed, simulating 32 mm rainfall. After that, samples were collected from the columns, at 0-20 and 20-40 cm depths, to identify the residual effect of the addition of humic substances. A completely randomized design was used for this experiment, with 2×2×4 factorial statistical model and 3 replications. The results showed that, under acidic soil conditions, the use of fulvic acid provides more significant P release (up to 40%) in soil when compared to humic acid. When the rate of 240 L ha-1 is applied, the fulvic acid can release up to 83% of P in the soil.

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Section: Figurementioning

confidence: 89%

Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns

Oliveira¹,

Tavares²,

Assis³

et al. 2021

Semina: Ciênc. Agrár.

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“…The main limitations in most Cerrado soils, especially Oxisols, are insufficient development of negative electric charges, high P adsorption, and low nutrient availability (Souza & Lobato, 2004;M. A. Baldotto & L. E. B. Baldotto, 2014;Silva & Lana, 2015) mainly due to the intense weathering caused by high rainfall and temperatures in the region. These limitations can be addressed by increasing the organic matter content of the soil.…”

Section: Introductionmentioning

confidence: 99%

Humic Substances With Mineral Fertilization on Nutrient Availability in Irrigated Soil

Tavares¹,

Oliveira²,

Assis³

et al. 2021

JAS

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This study aimed to evaluate the alternative use of humic substances (humic and fulvic acid) combined or not with mineral fertilization containing Nitrogen (N), Phosphorus (P) and Potassium (K) in the process of nutrient retention in the soil. For this, an experiment was conducted in a greenhouse with PVC columns of 40 cm high and 5 cm in diameter, where they were filled with Oxisol sample, being half of the treatments fertilized with NPK and half without at. Humic substances were added at doses equivalent to 0, 60, 120 and, 240 L ha-1. After this, 10 irrigations were made with 32 mm rain simulation. After 30 days, soil samples were collected in the upper (0-20 cm) and lower (20-40 cm) layers of the columns. Soil samples were evaluated for P, K, Ca, Mg content, pH, and soil conductivity. The experiment was in a completely randomized design, with a factorial statistical scheme of 2 × 2 × 4 with three replicates. The results showed that mineral fertilization complemented with the use of humic acid promoted a higher residual effect of Ca and K in the soil after 30 days. The fulvic acid, when used in a complementary way to mineral fertilization, promoted a higher amount of P in the soil. In the absence of mineral fertilization, the effect of humic substance use is low on the availability of nutrients in the soil.

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“…There is a great variety of agrominerals -such as "verdete de Abaeté" (Silva & Lana, 2015), phonolite (Tavares et al, 2018), basalt and granite powder, alkaline ultramafic, alkaline breccia, biotite schist, and phlogopite schist (Ribeiro et al, 2010) -, with a diverse composition and mineralogy. These rocks also contain various chemical elements; some of them are essential to plants as mineral nutrients, whose availability varies according to the agromineral.…”

Section: Introductionmentioning

confidence: 99%

Solubility and availability of micronutrients extracted from silicate agrominerals

Marchi

Guelfi-Silva

Malaquias

et al. 2020

Pesq. agropec. bras.

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The objective of this work was to evaluate the solubility of the micronutrients copper, nickel, and zinc, chemically extracted from silicate agrominerals, as alternative sources of potassium for lettuce (Lactuca sativa) and rice (Oryza sativa) cultures, as well as their availability to the plants. The micronutrient contents of five agrominerals (alkaline ultramafic, biotite schist, volcanic breccia, phlogopite schist, and mining by-product from Chapada) were evaluated, after being extracted by the citric acid, hydrochloric acid, diethylenetriaminepentaacetic acid, 3051A, neutral ammonium citrate, and Mehlich-3 methods. The agrominerals, at the doses of 0 (control), 200, 400, and 600 kg ha-1 K, were mixed to soil where lettuce and rice were cultivated. The agrominerals presented a low solubility of Ni, Cu, and Zn, with lower contents in lettuce shoots and rice grains than the corresponding soluble standards in sulfate form. The availability of micronutrients to the plants increased with the use of agrominerals, in comparison with the control. Similarities were observed in micronutrient solubility and availability between the different groups of agrominerals. The solubility and availability of Cu, Ni, and Zn depend on the solubility of the minerals that compose the agrominerals.

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Incubação Do Verdete Com Diferentes Fontes De Ácidos Para Disponibilização De Potássio, Cálcio, Magnésio Do Solo.

Cited by 6 publications

References 6 publications

Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns

Nutrient dynamics with application of humic substances and liming in irrigated soil filled columns

Humic Substances With Mineral Fertilization on Nutrient Availability in Irrigated Soil

Solubility and availability of micronutrients extracted from silicate agrominerals

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