Changes on Phosphorus Functional Fractions of Two Louisiana Alluvial Soils Grown with Corn at Different Phosphorus Rates. Issue 11 (17th June 2022)

• Record Type: Journal Article
• Authors: Dalen, Marilyn; Tubana, Brenda; Teboh, Jasper; Kanke, Yumiko; Lofton, Josh
• Is Part Of: Communications in soil science and plant analysis. Volume 53:Issue 11(2022)
• Page Start: 1420
• Page End: 1431
• Publication Date: 2022-06-17
• Subjects: Phosphorus -- alluvial soil -- fractionation -- inorganic phosphorus -- fertilization; Soil science -- Periodicals; Plants -- Chemical analysis -- Periodicals; Agricultural chemistry -- Periodicals; 631.405
• DOI: 10.1080/00103624.2022.2046038
• Languages: English
• ISSNs: 0010-3624

Abstract

ABSTRACT: Soils in Mississippi River alluvial plains is one of the distinct soil areas in Louisiana under corn ( Zea mays ) production. This study was conducted to evaluate the changes on Mehlich-3 extractable-phosphorus (P) and P-functional fractions of two Louisiana alluvial soils i.e., Commerce silt loam (Commerce sl) and Perry clay (Perry cl). Potted air-dried soils were mixed with different P rates (0, 34, 67, 101 and 134 kg P2 O5 ha −1 ) and planted with corn seeds. Soil samples were collected 30 days after P application (30 DAP) and at harvest of corn. The Commerce sl and Perry cl differed considerably in the distribution of different P fractions. The unutilized P fertilizer was transformed into calcium (Ca)-P for Commerce sl while it transformed into iron (Fe)-P and reductant-P for Perry cl. Overall, the labile- and aluminum (Al)-P fractions before planting increased with increasing P rate while Fe-P with P rates increased only at harvest for both soils. With time across P rates, both soils built-up less readily available reductant-P. In terms of soil total P, residual-P and total inorganic P (Pi) components, Commerce sl and Perry cl soils differed significantly ( P < .05) at 30 DAP and at harvest. On the other hand, the total P and residual-P were not affected by P rates at 30 DAP and at harvest for both soils. Phosphorus fertilization depending on soil properties, can promote certain P fractions in the soil wherein the contribution to corn P nutrition would likely have to come from the readily available P fractions.