Alternative sources of potassium in the growth of calla lily

Boldrin, Karina Volpi Furtini; Paiva, Patrícia Duarte de Oliveira; Boldrin, Paulo Fernandes; Neto, Antônio Eduardo Furtini; Almeida, Brígida Resende

doi:10.1016/j.scienta.2019.04.008

Cited by 11 publications

(9 citation statements)

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“…The application of fertilizers in the granulated form associated with the cultivation of plants for only 38 d might have been the cause of the low efficiency of K release in the use of calcined glauconite, due to the smaller contact surface of the fertilizer with the soil. These results differ from those shown by Boldrin et al (2019); Duarte et al (2015) and Santos et al (2016), who showed that the use of calcined glauconite allowed the release of K and its utilization by plants.…”

Section: Resultscontrasting

confidence: 99%

“…The effect of these processes also enabled the increase of K availability for Mombasa grass and maize when compared with the use of fresh rock (Santos et al, 2016). Moreover, the calcination process was also efficient to increase the release efficiency of K in glauconite in ornamental plants (Boldrin et al, 2019) and in millets (Duarte et al, 2015).…”

Section: Introductionmentioning

confidence: 99%

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Alternative sources of potassium for maize cultivation

et al. 2019

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Brazil is the largest importer of potassium (K) fertilizers in the world, importing about 95% of all the potassium consumed by its agriculture. Thus, new sources and technologies to increase K availability have been studied. This study aimed to evaluate the agronomic viability of the use of calcined glauconite and phonolite blended and granulated with two organic materials on maize growth in pots, using two soils of contrasting texture in a controlled environment. Were evaluated eight sources of potassium: phonolite; phonolite + poultry manure; phonolite + cattle manure; calcined glauconite; calcined glauconite + poultry manure; calcined glauconite + cattle manure; negative control (no K); and positive control (K - KCl), and two soils of contrasting texture. The experiment was carried out for 38 d. The following parameters were analyzed: plant height, stem diameter, shoot dry mass, leaf number, leaf contents of nitrogen (N), K and phosphorus (P), and the SPAD chlorophyll meter. In the sandy soil, the source consisting of phonolite + chicken manure was similar to KCl application regarding plant height, stem diameter and shoot dry mass. As for the clayey soil, when both rocks were blended with the organic wastes, they were similar to KCl for shoot dry mass. The use of pure granulated rocks, calcined glauconite and phonolite without blending with the organic residues is not efficient to provide available K to maize plants.

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Section: Resultscontrasting

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Alternative sources of potassium for maize cultivation

et al. 2019

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“…The lower plant height observed can be attributed to the low solubilization of the rock and, consequently, low release of nutrients to the corn plant. On the other hand, the growth of plants in the absence of K can be justified by the use of this element in the nutrient reserves of the rhizome (Boldrin et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

“…The major differences occurred between the witness and the dose of 90 and 120 kg ha -1 of K 2 O for treatments with potassium sulfate and wood ash (Fig 2). The heights of the corn plants were influenced by the interaction between the sources and the rate of K used, alternative sources of K produced plants of height similar to plants grown with the conventional nutrient source (Boldrin et al, 2019).…”

Section: Resultsmentioning

confidence: 99%

Alternative for potassic fertilization of vegetables in organic management in low fertility natural soil of the humid tropics

Santos

2020

Emir J Food Agric

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The organic food production and mainly the demand for these products have been growing much worldwide, and with this rising demand there is need for more adequate soil management. Organic fertilization is one of the points to improve and the alternative sources of nutrients should be better evaluated. Potassium is an essential nutrient required in large quantities by greenery and fruit, but according to the legislation of organic production, it can only be used as crushed rocks such as potassium sulfate. The objective of this work was to evaluate the efficiency of potassium sulfate (soluble source), wood ash and marble powder as alternative sources of potassium in organic system, using hybrid maize AG 1051 as the indicator crop. The experimental design applied was in randomized blocks in the 3x4x2 factorial scheme, consisting of three potassium sources applied in four doses (0, 60, 90 and 120 kg ha-1 K2O) in the presence and absence of Biofertilizer, with four repetitions. The data were submitted to analysis of variance (ANOVA) and the averages were compared by the Tukey test (p < 0.05). Both wood ash and marble powder tested can be used as complementary potassium fertilization in organic production systems. Marble powder proved to be the most efficient among the treatments and the Biofertilizer did not have a significant effect on the evaluated characteristics.

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“…They are formed by tetrahedral silica and aluminum groups, strongly linked together by cations, with the K inserted in the crystalline structure, making it difficult to extract (12). As a consequence, the dissolution process of this mineral in the soil involves complex reactions and mechanisms, which limits its application as a natural fertilizer once it does not meet the minimum nutritional demands required by plants (21,22). A better understanding about the action of microbial organic acids on highly available minerals such as K-feldspar could contribute to promote their use as natural fertilizer.…”

Section: Introductionmentioning

confidence: 99%

Unveiling the Solubilization of Potassium Mineral Rocks in Organic Acids for Application as K-fertilizer

Lodi

Klaic

Bortoletto-Santos

et al. 2021

Preprint

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Organic acids produced by soil microorganisms can be useful to promote the release of potassium (K) from potassium mineral rocks (KR), but the complexity of low-reactivity minerals limits K solubilization and their use as fertilizer. Here, we investigate the ways that different organic acids (gluconic, oxalic, and citric) can affect the solubilization of potassium minerals, in order to propose process strategies to improve their solubility. For this, evaluations were performed using the model minerals KRpolyhalite (sedimentary mineral), KRfeldspar (igneous mineral), and KCl (commercial fertilizer). For KCl and KRpolyhalite, complete solubilization was achieved using all the organic acids, while for KRfeldspar, the highest K+ solubilization (34.86 mg L-1) was achieved with oxalic acid. The solubility of KRfeldspar was further investigated under submerged cultivation with the filamentous fungus Aspergillus niger, as well as after a mechanochemical grinding treatment. The biotechnological route resulted in solubilized K+ up to 63.2 mg L-1. The mechanochemical route, on the other hand, increased the release of K+ by about 8.6 times (993 mg L-1) compared to the natural mineral, due to the greater fragmentation of the particles after the treatment (with a surface area about 2.5 times higher than for the in natura KRfeldspar). These findings demonstrated the potential of applying biotechnological and mechanochemical routes with organic acids to improve the solubilization of K present in low reactivity mineral rocks, contributing to the use of these minerals as fertilizers in more sustainable agricultural practices.

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Alternative sources of potassium in the growth of calla lily

Cited by 11 publications

References 11 publications

Alternative sources of potassium for maize cultivation

Alternative sources of potassium for maize cultivation

Alternative for potassic fertilization of vegetables in organic management in low fertility natural soil of the humid tropics

Unveiling the Solubilization of Potassium Mineral Rocks in Organic Acids for Application as K-fertilizer

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