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Titolo:
Irrigation water quality, soil amendment, and crop effects on sodium leaching
Autore:
Bauder, JW; Brock, TA;
Indirizzi:
Montana State Univ, Dept Land Resources & Environm Sci, Bozeman, MT 59717 USA Montana State Univ Bozeman MT USA 59717 vironm Sci, Bozeman, MT 59717 USA INEEL Res Ctr IRC, Idaho Falls, ID USA INEEL Res Ctr IRC Idaho Falls ID USA EL Res Ctr IRC, Idaho Falls, ID USA
Titolo Testata:
ARID LAND RESEARCH AND MANAGEMENT
fascicolo: 2, volume: 15, anno: 2001,
pagine: 101 - 113
SICI:
1532-4982(200104/06)15:2<101:IWQSAA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Keywords:
salinity; gypsum; sodium adsorption ratio; electrical conductivity; soil reclamation;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
17
Recensione:
Indirizzi per estratti:
Indirizzo: Bauder, JW Montana State Univ, Dept Land Resources & Environm Sci, Leon Johnson Hall,POB 173120, Bozeman, MT 59717 USA Montana State Univ Leon Johnson Hall,POB 173120 Bozeman MT USA 59717
Citazione:
J.W. Bauder e T.A. Brock, "Irrigation water quality, soil amendment, and crop effects on sodium leaching", ARID LAND R, 15(2), 2001, pp. 101-113

Abstract

Due to prolonged irrigation with water of marginal quality, salination of irrigated soils in some areas of southeastern Montana has led to a need forbetter understanding of the soil and water management alternatives for irrigators. A study was conducted with Haverson silty clay (fine-loamy,, mixed, calcareous, mesic Ustic Torrifluvent) to determine the effect of combinations of chemical amendments, crop species, and irrigation water quality on Na+ and salt leaching from salt-affected soils. Amendments included CaSO4, P-CaSO4 and MgCl2; also included was a nonamended control treatment. Crops included alfalfa (Medicago sativa L.), barley (Hordeum vulgare L.), sorghum-sudangrass [(Sorghum vulgare x Sorghum drumondii) (sordan)], and a noncropped control. All soil columns (0.15 m x 0.5 m) were irrigated with either high Na+ adsorption ratio (SAR(adj) = 16.6), high total dissolved solids (TDS = 1647 mg L-1) water, or low SAR(adj) (1.15), low TDS (747 mg L-1) water. Drainage volume, electrical conductivity (EC), SAR, Na+ of drainage water,and Na+ leaching were monitored over three crop cycles. Irrigation with high SAR-high TDS water increased the soil solution EC to approximately, 5.5 dS m(-1), but did not decrease crop yields relative to irrigation water having SAR(adj) and TDS of 0.37 and 747 mg kg(-1), respectively. Magnesium displaced Na+ on the exchange complex, but the effects were short-term compared to CaSO4 Or P-CaSO4. Amendments increased Yields of barley from 14%-27% and alfalfa by 25% but had no effect on sordan. Columns cropped to barley had 28% greater Na+ leaching than columns planted to other crops. Noncropped columns accumulated the least net soluble salt and Na+. Results of this study demonstrate that specific crop and amendment combinations can significantly affect the efficiency of saline soil reclamation strategies and impact quality of irrigation return flow.

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Documento generato il 04/04/20 alle ore 14:42:16