Sansom, Naeth, Chanasyk and Bateman (1998) In situ amelioration of sodic minespoil with chemical amendments and crop management. I. Soil chemical properties

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In situ amelioration of sodic minespoil with chemical amendments and crop management. I. Soil chemical properties

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CONTRIBUTORS:

	Author:	Sansom, J J
	Author:	Naeth, M A (University of Alberta)
	Author:	Chanasyk, D S (University of Alberta)
	Author:	Bateman, J C

JOURNAL:

Canadian journal of soil science, 78(2), 359 - 365.

YEAR:

1998

PUB TYPE:

Journal Article

SUBJECT(S):

sodic minespoil, soil sodicity, calcareous soil, land reclamation, crop management, soil properties, gypsum

DISCIPLINE:

Ecology

HTTP:

LANGUAGE:

English

PUB ID:

103-396-550 (Last edited on 2003/11/10 19:58:47 US/Mountain)

SPONSOR(S):

ABSTRACT:
Sodic minespoils, which often have undesirable properties that limit plant growth, may be ameliorated by chemical amendments. The objective of this study was to determine the effectiveness of sulfur and gypsum amendments in conjunction with crop management (summerfallow/barley rotation and continuous forage) in reducing the sodicity of a calcareous, sodic, sandy loam minespoil at the Highvale coal mine, west of Edmonton, Alberta. Amendments were added in chemically equivalent amounts to theoretically ameliorate the uppermost 35 cm of the spoil. Topsoil (20 cm) overlay both the amended and unamended spoil. Soil chemical parameters were measured to determine amendment effectiveness in an upper amended (20-35 cm depth interval from the surface), a lower amended (40-55 cm) and an upper unamended layer (55-70 cm), all within minespoil. Both sulfur and gypsum effectively reduced minespoil sodicity. The ameliorative effect on SAR occurred within 3 mo with gypsum amendment, but was slower with sulfur. Both amendments significantly lowered Sat% and pH but significantly elevated concentrations of Na+, Ca2+, Mg2+, K+ and SO42- in the upper amended layer of the minespoil. Crop management had no significant effect on SAR; however, solute concentrations were lower at all depths under fallow/barley than under continuous forage treatments.

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