Phosphorus fractions and correlation with soil attributes in a chronosequence of agricultural under no-tillage

Rosset, Jean Sérgio; Guareschi, Roni Fernandes; Pinto, Luiz Alberto Rodrigues da Silva; Pereira, Marcos Gervásio; Lana, Maria do Carmo

doi:10.5433/1679-0359.2016v37n6p3915

Cited by 4 publications

(3 citation statements)

References 17 publications

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“…Since there was no comparison between clayey and sandy soils due to their natural constitution and isolated effects on P dynamics, as described by Fink et al (2016), Rosset et al (2016), Coletto et al (2015), and Slazak et al (2010), the results will be interpreted for each isolated soil.…”

Section: Resultsmentioning

confidence: 99%

“…Soil organic matter has an important influence on P dynamics due to the release of organic acids (Lee and Kim 2007). The organic acids can block the P adsorption sites on Fe and Al sesquioxides, strongly related to maintenance of P in labile fractions (Rosset et al 2016;Slazak et al 2010;Zamuner et al 2008;Lee and Kim 2007;McDowell and Condron 2001;Iyamuremye et al 1996). In studies, Teles et al (2017) noticed an increase of Po BIC in tropical clayey soils with organic matter inputs by cover crop cultivation, demonstrating that P labile fractions are easily modified with P fertilizer application.…”

Section: Discussionmentioning

confidence: 99%

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Dynamic of P Flux in Tropical Acid Soils Fertilized with Humic Acid–Complexed Phosphate

Zavaschi

Faria

Almeida

et al. 2020

J Soil Sci Plant Nutr

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Soils are characterized by high phosphorus (P) immobilization, considering the major limiting factor for agricultural production in Brazil. Phosphate fertilizers complexed with humic acids (HA) have been presented as an alternative to inhibit P immobilization in soils; however, little is known regarding its efficiency or its effect on soil P dynamics when associated with liming. The objective was to investigate labile moderately and non-labile P changes in sandy and clayey soils under application of distinct P sources and liming. Tropical soils were incubated using 200 mg kg −1 of P (simple superphosphate-SSP and SSP + HA), associated or not with calcium oxide. Check-plots were run in both soils without any P addition and/or no liming. After 60, 90, and 180 days of incubation, P contents were fractionated into P inorganic (Pi) and organic (Po), in the following pools: labile (P AER and P BIC), moderately labile (P HCl and P HID-0.1), and non-labile fractions (P HID-0.5 and P residual). There was a P flux between non-labile and labile fractions, controlled by the use of P fertilizer and liming. In sandy soil, the P addition promoted a clear P flux from non-labile to labile fractions; however, in clayey soil, there was a reverse P flux. The lack of P addition promotes a negative balance in soil with a decrease of labile fractions, mainly when associated with liming. Therefore, inputs are necessary to avoid soil P depletion.

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Section: Resultsmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Dynamic of P Flux in Tropical Acid Soils Fertilized with Humic Acid–Complexed Phosphate

Zavaschi

Faria

Almeida

et al. 2020

J Soil Sci Plant Nutr

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show abstract

“…P returns to the soil after plant death, mainly when its organic form returns to SOM. Therefore, the presence of Pi or Po in the soil is determined by the SOM content, which can be changed depending on the adopted soil management system (22,23). The cultivation of annual crops based on soil ploughing decreases SOM (24,25), even with NPK fertilization (22,26).…”

Section: Introductionmentioning

confidence: 99%

Phosphorus Stock Depletion and Soil C:N:P Stoichiometry Under Annual Crop Rotations and Grassland Management Systems Over 13 Years

Somavilla

Caner²,

Silva³

et al. 2022

Front. Soil Sci.

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Phosphorus (P) nutrition is essential to both plant yield and soil organic matter (SOM) input. However, continuous extraction of P by plants and biomass harvesting can lead to soil P stock depletion, a reduction in crop yields and ultimately a reduction in organic matter input to the soil. In this work, we analysed P, C and N stock trends in the 0-30 cm topsoil layer cultivated with permanent cropland (CC) and mowed permanent grassland (GG) for 13 years. In addition, we characterized the changes in P organic forms by using 31P-NMR. The results showed that the amount of P exported within 13 years was 10% greater in GG than in CC (295 and 268 kg ha-1, respectively). The total P stocks decreased under both the CC and GG management systems (0.30 and 0.25 Mg ha-1, respectively). This depletion was mainly observed in total Pi forms, which recorded reductions of 0.75 and 0.29 Mg ha-1 in GG and CC, respectively. The total Po stock increased by 42.6% in GG; these results were consistent with the increase in C and N stocks in GG (2.6 and 0.19 Mg ha-1, respectively) and their reduction in CC (-4.2 and -0.38 Mg ha-1, respectively). Although P depletion mainly affected the P pool presenting the highest lability (labile P), this depletion did not have a negative effect on plant yield after 13 years due to the buffering capacity of P pools presenting less lability (moderately labile P). Mowing permanent grasslands led to a change in the pool of labile P from inorganic to organic forms and an increase in soil C and N stocks. Based on the 31P-NMR technique, permanent grasslands significantly reduced α-glycerophosphate and increased myo-IHP and adenosine monophosphate more than the permanent cropland. Although there was no significant decrease in productivity, the depletion of available P should be monitored over time, especially in mown permanent grassland crops, to prevent potential nutrient stress.

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Phosphorus accumulation in soil after successive applications of swine manure: a long-term study in Brazil

et al. 2020

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Phosphorus fractions and correlation with soil attributes in a chronosequence of agricultural under no-tillage

Cited by 4 publications

References 17 publications

Dynamic of P Flux in Tropical Acid Soils Fertilized with Humic Acid–Complexed Phosphate

Dynamic of P Flux in Tropical Acid Soils Fertilized with Humic Acid–Complexed Phosphate

Phosphorus Stock Depletion and Soil C:N:P Stoichiometry Under Annual Crop Rotations and Grassland Management Systems Over 13 Years

Phosphorus accumulation in soil after successive applications of swine manure: a long-term study in Brazil

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