Adsorption and availability of phosphorous following the application of limestone to an acid, aluminous soil

Journal Article · Sat Jan 01 04:00:00 EST 1983 · Soil Sci. Soc. Am. J.; (United States)

DOI:https://doi.org/10.2136/sssaj1983.03615995004700050009x· OSTI ID:6663745

Sims, J T; Ellis, B G

Changes in the adsorption and availability of P in an acid, aluminous soil (surface and subsoil) were evaluated following liming to neutralize 1N KCl-exchangeable Al (minimal liming) or to pH 6.8 as determined by the SMP (Shoemaker-McLean-Pratt) buffer method. Langmuir adsorption isotherms were utilized to ascertain changes in P adsorption. A greenhouse bioassy was conducted to evaluate differences in P availability to plants (Oats, Avena sativa L. cv. Korwood) due to liming and incubation treatments. Results from these studies confirm that minimal liming is the most effective approach, from both agronomic and economic standpoints. Minimal liming optimized P uptake and minimized the P adsorption maxima (Langmuir b values). Liming by the SMP recommendation did not improve P uptake despite the application of three times as much lime, and also markedly reduced exchangeable Mg. Aging of adsorbate surfaces in the soil reduced their bonding intensity for P (Langmuir K), as did increasing soil pH. Development of ordered, less soluble Al-OH polymers with fewer nonstructural OH groups capable of ligand exchange with P is postulated as the mechanism underlying these observations. Increases in pH-dependent negative surface charge and P adsorption by free CaCO/sub 3/ may be involved. 43 references, 8 tables.

• Research Organization: Univ. of Delaware, Newark
• OSTI ID: 6663745
• Journal Information: Soil Sci. Soc. Am. J.; (United States), Journal Name: Soil Sci. Soc. Am. J.; (United States) Vol. 47; ISSN SSSJD
• Country of Publication: United States
• Language: English

Related Subjects

510200* -- Environment
Terrestrial-- Chemicals Monitoring & Transport-- (-1989)
54 ENVIRONMENTAL SCIENCES
560303 -- Chemicals Metabolism & Toxicology-- Plants-- (-1987)
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ADSORPTION
ADSORPTION ISOTHERMS
ALKALINE EARTH METAL COMPOUNDS
ALUMINIUM
BIOASSAY
BIOLOGICAL AVAILABILITY
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON COMPOUNDS
CARBONATES
CEREALS
ELEMENTS
GRAMINEAE
GRASS
GROWTH
ISOTHERM
LIMING
METALS
NONMETALS
OATS
OXYGEN COMPOUNDS
PH VALUE
PHOSPHORUS
PLANT GROWTH
PLANTS
SOILS
SORPTION
USES