Modeling of Phosphorus Losses by Water Erosion

Farias, Vera Lúcia da Silva; Filho, Marcílio Vieira Martins; Paula, Daniela Tolêdo de; Siqueira, Diego Silva

doi:10.1590/1809-4430-eng.agric.v38n1p149-157/2018

Cited by 3 publications

(3 citation statements)

References 26 publications

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“…Our experiment covers a 3‐yr period following a one‐time application of manure compost. The lack of measurable increases in Hedley TP at the 10‐to‐30‐cm depth at Blue Creek could be linked to a combination of (a) surface loss of compost‐derived P due to water erosion at the Blue Creek site, which is located on a slight slope while Snowville is nearly level (Farias et al., 2018); (b) leaching; and/or (c) faster cycling of compost derived P due to higher available moisture at the 10‐to‐30‐cm depth.…”

Section: Resultsmentioning

confidence: 99%

Variable impact of compost on phosphorus dynamics in organic dryland soils following a one‐time application

Atoloye

Jacobson

Creech

et al. 2021

Soil Science Soc of Amer J

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Prolonged benefits following a single application of compost in organic dryland wheat (Triticum aestivum L.) in the western United States have been documented, including the long-term bioavailability of phosphorus (P). Information on the bioavailability and forms of P following a one-time compost application in marginal organic agroecosystems with low and infrequent use of fertilizers is required to promote sustainability. The goal of this study was to evaluate changes in Hedley P pools following a one-time application of manure compost and its potential influence on short-term (3-yr) P bioavailability. Steer manure compost at 0, 25, and 50 Mg dry weight ha -1 was applied to two organic dryland sites, Snowville and Blue Creek, with contrasting soil characteristics in northern Utah in a randomized complete block design. Potential phosphatase assays, a laboratory aerobic incubation study, and soil P fractionations were carried out to assess the transformation of P 1 and 3 yr after a one-time compost application. At 0-10 cm, compost application resulted in increased acid phosphatase at Snowville (67.3 vs. 42.7 μg p-nitrophenol g -1 soil, p = .003), while alkaline phosphatase increased at Blue Creek (124 vs. 49 μg p-nitrophenol g -1 soil, p = .0185). The path coefficient between compost P and Hedley labile inorganic P was significant at Snowville, but not at Blue Creek, suggesting that the pathways of P differed between the sites. The Hedley stable P pool was a sink of compost P at Snowville but a source at Blue Creek. In conclusion, our work shows that a one-time compost application had a differential effect on the variation in P dynamics in organic dryland winter wheat-fallow soils. The potential long-term benefits may be greater in semiarid soils with lower available P levels, higher carbonate levels and pH, and drier conditions.

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Section: Resultsmentioning

confidence: 99%

Variable impact of compost on phosphorus dynamics in organic dryland soils following a one‐time application

Atoloye

Jacobson

Creech

et al. 2021

Soil Science Soc of Amer J

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“…Szara (2019) reported that liming applied in combination with mineral fertilisers reduces sandy soil sorption capacity leading to higher soil profile phosphorus mobility, causing phosphorus release from the soil. Farias et al (2018) found that the highest losses of phosphorus occur on slopes with concave land forms, reaching values higher than 0.02 mg l -1 , which is a critical value for eutrophication.…”

Section: Soil Categorisation From the Point Of View Of Water Source Pmentioning

confidence: 96%

Nitrogen and phosphorus transport as a criterion for soil categorisation

Torma¹,

Koco²,

Vilček³

2020

Soil Sci. Ann.

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Water pollution, both surface and underground, by agricultural activity is a relatively serious problem. The pollutants are transported from the soil to the water. The aim of this paper is to evaluate the soil transport function on the basis of present knowledge of soil nutrient (nitrogen and phosphorus) transport and soil and local properties. The west Slovak lowlands, south Slovak basins and east Slovak highlands were selected due to their different climate and soil parameters. Soil nutrient transport was classifi ed as (1) very weak, (2) weak, (3) moderate, (4) strong and (5) very strong. Accordingly, we defi ned the area of individual categories of soil transport function in agricultural soils in three observed areas in Slovakia. Thus we could determine the origin of the water pollution potential risk. Moreover, this is very important when it comes to observing of the Nitrate Directive as farmers can harmonise nitrogen and phosphorus fertilisation to soil categories. In the case of nitrogen, its transport is very dependent on soil nitrifi cation intensity with nitrogen, and the most fertile soils (on Žitný ostrov) are very susceptible to water pollution. Almost 88% of agricultural soil in this area are in the strong and very strong nitrogen transport categories. On the other hand, only 2.1% of soils in hilly and cold landscapes (Ondavská vrchovina) feature water nitrogen pollution. Phosphorus transport is very strong on the hilly landscape with shallow soils (less than 0.30 m) and/or with gravel high content (Ondavská vrchovina). Especially in these locations, an increase of water body phosphorus content and thus a decrease in water quality (almost 50% of total agricultural soil area) is possible.

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“…The model of P loss as a function of the dry mass of straw and the green cover showed similar behavior as for K: P loss increased with increasing dry mass of the straw and with decreasing green cover. Modeling P losses is relevant for assessing soil use and management, as P losses in runoff water can increase the risk of eutrophication (Farias et al 2018;Leite et al 2018;Wang et al 2018). Modeling nutrient losses in an Oxisol Bragantia, Campinas, 83, e20230191, 2024 Bertol et al (2003) investigated nutrient losses caused by water erosion and found that P concentrations within the runoff were consistently low across all treatments and rainfall sessions applied; a phenomenon potentially attributed to the scanty presence of this element in the soil and its strong colloidal adsorption.…”

Section: P Lossmentioning

confidence: 99%

Modeling nutrient losses in an Oxisol under different management systems and rainfall events

Chang,

Secco,

Marins

et al. 2024

Bragantia

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This study aimed to model nutrient losses in an Oxisol under varied soil properties and vegetation cover. The experimental area was located at the Paraná Rural Development Institute, in Santa Tereza do Oeste, Paraná, Brazil. The treatments consisted of six cover crops in summer, six cover crops in winter, and management systems no-tillage (NT) traditional (control), NT with gypsum, and NT with scarification. Nutrient data were collected at each natural rainfall through sample collection from collection troughs. The design was completely randomized, and the data were adjusted using an exponential function of two variables, as a function of soil density, macroporosity, straw dry mass, green cover, and rainfall. Greater losses of Mg and Ca was related to higher soil density and lower macroporosity. Lower losses of Mg, Ca, K, and P were associated with lower straw dry mass and higher green cover. K and P losses were stable for all soil density values, but they decreased with an increase in macroporosity.

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Modeling of Phosphorus Losses by Water Erosion

Cited by 3 publications

References 26 publications

Variable impact of compost on phosphorus dynamics in organic dryland soils following a one‐time application

Variable impact of compost on phosphorus dynamics in organic dryland soils following a one‐time application

Nitrogen and phosphorus transport as a criterion for soil categorisation

Modeling nutrient losses in an Oxisol under different management systems and rainfall events

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