Phosphorus in the runoff of soils with contrasting textures influenced by soil slope and pig slurry application

Grando, Douglas Luiz; Gatiboni, Luciano Colpo; Mumbach, Gilmar Luiz; Dall’Orsoletta, Daniel João; Souza, Abelino Anacleto de; Schmitt, Djalma Eugênio

doi:10.1016/j.agwat.2021.107178

Cited by 6 publications

(3 citation statements)

References 41 publications

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“…Thus, there may also be increase in the levels lost by runoff, as observed for P and Mg in the Nitisol (Exhibit 9). Nitisol with a clayey texture shows greater P adsorption than soils with lower clay content (Gérard, 2016; Grando et al., 2021a) and the consequent significant enrichment of the surface layer (Rubæk et al., 2013). P exhibits greater mobility in soil with lower clay content, moving in the soil profile (Abboud et al., 2018).…”

Section: Discussionmentioning

confidence: 99%

“…On the Nitisol, the slope were mechanically built to 10%, 20%, and 30% of slope. The treatments were distributed in an entirely randomized block design, with three repetitions, varying only the slope of the land where they were installed, totaling 36 experimental units in each location (Grando et al., 2021a).…”

Section: Methodsmentioning

confidence: 99%

“…Another factor that may influence nutrient losses by runoff is soil texture. Soils with a clayey texture have lower water infiltration and greater capacity to retain nutrients, and, when applied superficially, there is an increase in the chances of their loss by runoff (Dall'Orsoletta et al, 2021;Grando et al, 2021a). Therefore, it is necessary to quantify the effects of the slope and liquid PS on the loss of chemical elements.…”

Section: Eutrophication Promotes Accelerated Algae Growth In the Envi...mentioning

confidence: 99%

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Slope and pig slurry rate may increase the transfer of chemical elements by surface water runoff

Grando

Gatiboni

Mumbach³

et al. 2023

Environmental Quality Mgmt

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There is a need to evaluate the interference of pig slurry rate and the terrain slope in the chemical elements losses from the soil. This work aimed to quantify water and chemical element losses by surface runoff due to terrain slope and pig slurry rate (PS) in two soils with contrasting textures. Two trials were evaluated in 2018 and 2019 in Cambisol and Nitisol. Rates of 0, 22.5, 45, and 90 m 3 ha −1 yr −1 of PS were applied superficially in sites with slopes ranging from 10% to 35%. Perennial forage grass Tifton 85 (Cynodon dactylon) was grown as summer crop and ryegrass (Lolium multiflorum) was sown in the cold seasons in a field environment. Were determined the runoff, the volume of water, and chemical elements (Al, Ca, P, Mg, Cd, Cr, Cu, Mn, Fe, Pb, and Zn) lost by the surface runoff after natural rainfall. Increasing land slope elevated water losses substantially, on average 23.4 times in Cambisol and 10.8 times in Nitisol. This increase resulted in average increases of 27.6 and 12.4 times in the losses of the chemical elements analyzed for Cambisol and Nitisol, respectively. There was a reduction in water losses by surface runoff due to increased PS rates applied in both sites. The increased PS rate affected the losses of Cr and Cu in Cambisol and P, Mg, Cd, and Cu in Nitisol.The clayey soil potentiated the water and chemical elements losses by surface runoff in relation to the soil with lower clay content. Regardless of the soil, water and chemical element losses are maximized at higher slopes.

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