Mobility of phosphorus from organic and inorganic source materials in a sandy soil
- Agronomy, Universidade Federal de Uberlândia, Av. Para, 1720, Uberlândia, MG, Brazil
- Instituto Nacional do Semiárido (INSA), Av. Francisco Lopes de Almeida, S/N, Serrotão, Campina Grande, PB 58434‑700, Brazil
- Instituto Federal do Norte de Minas, Higway BR 367 Almenara/Jequitinhonha, km 111, Rural Zone, Almenara, MG 39900‑000, Brazil
- Dpto. de Solos e Engenharia Rural, Universidade Federal da Paraíba, Higway PB 049 km 12, Areia, PB, Brazil
- Instituto de Ciências Agrárias‑ICIAG, Universidade Federal de Uberlândia, Av. Amazonas s/n Blok 2E and 01, Uberlândia, MG, Brazil
Received: 2017-08-18
Accepted: 2018-02-17
Published in Issue 2018-02-23

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Abstract
Purpose The long-term use of manure as a source of nutrients can promote phosphorus (P) leaching, especially in sandy
soils. The aim was to evaluate P mobility from organic and mineral sources in columns, linked with the Dystric Xeropsamments
adsorption characteristics with long-term organic fertilization regime.
Methods The mineral, chemical, and physical properties of the samples were characterized, including Langmuir adsorption
and desorption kinetics. The P mobility was determined in one leaching experiment, in 20 cm soil columns. The topsoil
(0–10 cm) layer was treated with organic (cattle, swine, goat, and hen manure) and inorganic fertilizers. Leaching was corresponding
to 10 pore volumes (PV), 1 PV day−1. Aliquots of the leachate were collected to analyze P concentrations. After
the leaching, the columns were sliced into 5-cm sections for the analysis of water-extractable P (WEP).
Results The mineral source obtained higher leaching of P and between the organic sources the bovine and swine manure. The
latter were the ones that had higher value of Pw
in the soil after the leaching. Due to the increase of the adsorption capacity
of P with depth, there was a reduction in the mobility of P, and an unbalance of Pw
in the soil was found.
Conclusions The mobility of P depends on the concentration of the soluble P soil or added material; moreover, the presence
of Fe and Al oxides, even in small amounts, reduces the mobility of P in sandy soil.
Keywords
- Adsorption,
- Leaching,
- Manure,
- Desorption
10.1007/s40093-018-0201-2