Open Access
ARTICLE
Changes in soil phosphorus fractions caused by cropping without nutrient reposition. A case study
Barresi O1,2, VM Chiocchio1,2, RS Lavado2
1
Cátedra de Microbiología Agrícola. Facultad de Agronomía, Universidad de Buenos Aires. Av. San Martín 4453, C1417DSE Buenos Aires, Argentina.
2
INBA (CONICET/UBA). Facultad de Agronomía, Universidad de Buenos Aires. Av. San Martín 4453, C1417DSE Buenos Aires, Argentina.
Address correspondence to: Ing. Agr. Raúl Lavado, e-mail: , +54-11-528-70657.
Phyton-International Journal of Experimental Botany 2018, 87(all), 14-17. https://doi.org/10.32604/phyton.2018.87.014
Abstract
Previous studies in soils of the Pampas region indicate
the prevalence of calcium phosphates within the very complex mix
of phosphorus (P) compounds in the soils. We studied the changes
in P fractions in a punctual situation in the Pampas region. The sampling
was carried out in a farm located near the city of Junín (-34.585;
-60.9589) and the soil was Junín series Typic Hapludoll. The farm
was devoted to grazing and sporadic crops, but from the last 30 years
changed to continuous agriculture. At no time fertilization matched
nutrients removal by crops. The soil P fractions were determined using
an improved version of the classical Chang and Jackson method.
Phosphorus linked to calcium decreased in absolute and relative terms
(49.1%) and P linked to aluminum and iron increased (144.8 and
100.4%, respectively). However, the proportion of latter fractions was
affected by the changes in organic and residual P fractions. If present
punctual finding could be generalized, it would indicate a change in
the composition of P fractions in the most cropped soils of the region.
Keywords
Cite This Article
O, B., Chiocchio, V., Lavado, R. (2018). Changes in soil phosphorus fractions caused by cropping without nutrient reposition. A case study.
Phyton-International Journal of Experimental Botany, 87(all), 14–17.