Phosphorus use in soybean in integrated production system under anticipation of phosphate fertilization

Guera, Keli Cristina Silva; Fonseca, Adriel Ferreira da; Harkatin, Silvano

doi:10.5935/1806-6690.20200044

Cited by 4 publications

(6 citation statements)

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“…The LMWOA can stimulate P release from water-insoluble phosphates (Dotaniya and Meena, 2015). Thus, the dissolution of these applied phosphates (e.g., rock phosphate and thermophosphates) and, managed under ICLS is favored, releasing P gradually for uptake by plant and presenting a greater residual effect in the soil solution, when applied annually (Galetto et al, 2014a,b;Guera et al, 2020). It appears that the use of phosphates with low solubility in ICLS, applied in broadcast without incorporation, can be an efficient alternative for the management of P fertility.…”

Section: Changes In the Dynamics Of Phosphorus Fractions Under Applic...mentioning

confidence: 99%

“…Phosphates that provide greater solubility, such as triple superphosphate (soluble in water + neutral ammonium citrate) and magnesium thermophosphate (soluble in citric acid), usually show better short-term performance when compared to lower solubility sources, such as rock phosphate (water-insoluble + neutral ammonium citrate and partially soluble in citric acid). This last phosphate ensures the gradual release of P to crops (Galetto et al, 2014a,b;Guera et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

“…In variable charge soils, phosphate fertilization has been used in the sowing furrow (Arruda Coelho et al, 2019), below and beside the seeds, considering the crop requirement to be implanted. However, in recent years, system fertilization has been used successfully (Galetto et al, 2014a,b;Guera et al, 2020). This system fertilization practice is more commonly practiced in South Brazil (Galetto et al, 2014a;Guera et al, 2020) by the anticipation of fertilization to the cover crop phase.…”

Section: Introductionmentioning

confidence: 99%

“…However, in recent years, system fertilization has been used successfully (Galetto et al, 2014a,b;Guera et al, 2020). This system fertilization practice is more commonly practiced in South Brazil (Galetto et al, 2014a;Guera et al, 2020) by the anticipation of fertilization to the cover crop phase. System fertilization can be done using several approaches around the world and it is important to put this strategy in context to a broader audience.…”

Section: Introductionmentioning

confidence: 99%

“…Additionally, there is a tendency to apply phosphate fertilizer broadcast with or without incorporation instead of applying it in sowing furrow, to maximize the use of machines and seeding (Galetto et al, 2014a;Hansel et al, 2017;Guera et al, 2020). However, application of phosphates in ICLS under no-tillage can lead to increased P concentrations near the soil surface and P immobilization due to increased adsorption on soil colloids (Hansel et al, 2017).In this context, it is expected that there will be an increase in available P fractions, over time, combined to different low solubility sources of phosphate utilization, annually applied in broadcast without incorporation and with the maintenance of SOM and greater cycling of nutrients in ICLS.…”

Section: Introductionmentioning

confidence: 99%

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Phosphorus fractions and their relationships with soil chemical attributes in an integrated crop-livestock system under annual phosphates fertilization

Guera

Fonseca

2022

Front. Sustain. Food Syst.

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The main factors affecting phosphorus (P) availability in soils are mineralogy, acidity, and concentration of elements in the soil solution. Moreover, P fertilizer sources and amounts can affect P cycling and adsorption of this element on colloids. In this research, we hypothesized that the use of phosphate sources of different solubilities can alter soil P adsorption process, due to chemical compositions of these sources and, in ICLS, the soil-plant-animal system can change the P forms distribution on soil profile and its interactions with the soil chemical attributes. To examine these hypotheses, a field experiment was conducted over 5 years, under a Haplic Cambisol, in an incomplete factorial scheme, with the treatments being composed of three P sources (triple superphosphate, rock phosphate—Arad and magnesium thermophosphate), three doses of total P2O5 (60, 120, and 180 kg ha−1) plus a treatment without application of phosphate fertilizer. Phosphate applications occurred annually, broadcast without incorporation, at the time of sowing the annual winter forage, in a crop rotation system that included pasture in autumn-winter and grain crops in spring-summer. Soil samples were collected at depths of 0 to 5, 5 to 10, 10 to 15, 15 to 20, and 20 to 30 cm and evaluated by Hedley P fractionation and the soil chemical attributes were quantified. The use of different phosphates applied broadcast without incorporation did not influence the concentrations of soil P fractions over a 5 year study. Phosphate fertilizer doses above 120 kg ha−1 of total P2O5 increased moderately labile and non-labile P fractions. The highest concentration of labile P was found up to 15 cm soil depth. It was found that P lability is strongly associated with calcium and total organic carbon concentrations in the soil profile. High concentrations of basic cations and sulfate in the soil solution increased moderately labile and non-labile P fractions. The complexity of ICLS interactions to maintain phosphorus dynamics in the soil was shown to be an intricate P release/adsorption process associated with soil chemical attributes.

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Section: Changes In the Dynamics Of Phosphorus Fractions Under Applic...mentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%