2017
DOI: 10.1590/1678-4499.173
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Phosphorus fractions in apple orchards in southern Brazil

Abstract: Phosphorus (P) applications at dosages higher than the necessary may cause P buildup in the soil labile fractions and, consequently, pollution of water sources. This study aimed to assess accumulation of P fractions as well as the parameters of adsorption isotherms in soil profiles having a history of application of phosphate fertilizers and cultivated with apple trees. Soil samples were collected from an area with no history of cultivation and 2 apple orchards cultivated for 8 (P8) and 18 (P18) years, in the … Show more

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Cited by 7 publications
(5 citation statements)
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“…Previously, several studies have reported high concentrations of labile P (Olsen-P, P M3 , and CaCl 2 -P) through 0-100-cm soil profile after vegetable cultivation for 8-25 years (Zhang et al 2003;Yan et al 2013;Yang et al 2014). In addition, after conversion of arable crop or native vegetation to fruit orchard for various spells of time, considerable Olsen-P accumulation has also been observed in subsoil layers (Lu et al 2016;Schmitt et al 2017). All these results reflect large accumulation of P at top soils after conversion of arable crops to more profitable vegetables or fruit trees has resulted in P leaching to deep soil layer such as 300 cm, where P was impossible to be utilized and will eventually be leached to deeper and deeper to reach ground water.…”
Section: Phosphorus Movement In the Soil Profilementioning
confidence: 97%
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“…Previously, several studies have reported high concentrations of labile P (Olsen-P, P M3 , and CaCl 2 -P) through 0-100-cm soil profile after vegetable cultivation for 8-25 years (Zhang et al 2003;Yan et al 2013;Yang et al 2014). In addition, after conversion of arable crop or native vegetation to fruit orchard for various spells of time, considerable Olsen-P accumulation has also been observed in subsoil layers (Lu et al 2016;Schmitt et al 2017). All these results reflect large accumulation of P at top soils after conversion of arable crops to more profitable vegetables or fruit trees has resulted in P leaching to deep soil layer such as 300 cm, where P was impossible to be utilized and will eventually be leached to deeper and deeper to reach ground water.…”
Section: Phosphorus Movement In the Soil Profilementioning
confidence: 97%
“…On an alkaline sandy soil, Zhang et al (2003) found that water soluble P and Olsen-P contents were significantly higher after 25 years of vegetable cultivation than those in forest soil throughout 0-90-cm soil profile in Florida, USA. In addition, some studies have also shown significant Olsen-P accumulation in subsoil layers after conversion of arable crop or native vegetation to fruit orchard for various planting histories (Wang et al 2015;Schmitt et al 2017). All these studies carried are mostly focused on the top 100-cm soil depth.…”
Section: Introductionmentioning
confidence: 99%
“…Brazilian apple growers apply large amounts of P fertilizers before orchard installation (CQFS-RS/SC, 2016) to promote tree growth, but are uncertain on the best fertilization practices on the following years, during fruit production. In order to avoid any possibility of P deficiency, some growers apply large amounts of phosphates annually, resulting in a build up in the soil P pool with both risks of P contamination (SCHMITT et al, 2017) and unnecessary expenses.…”
Section: Soil Sciencementioning
confidence: 99%
“…There is an accumulation of organic matter (Bonfatti et al, 2016) and organic P (Schmitt et al, 2017) in the soil of vineyards located at altitudes between 900 and 1,400 m. The organic forms of P in the soil can be mineralized, increasing the inorganic P fractions in the soil, some of which are absorbed by the plants (Rita et al, 2013). Part of the P absorbed by the grapevines is cycled through the deposition and decomposition of pruned leaves and branches, the deposition of cover crop shoots, and the senescence of grapevine roots and cover crop species (Schreiner, 2005;Tecchio et al, 2011).…”
Section: Introductionmentioning
confidence: 99%