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Polysaccharide and salt effects on infiltration and soil erosion. A rainfall simulation study
Year:
1991
Source of publication :
Soil Technology
Authors :
Levy, Guy
;
.
Shainberg, Isaac
;
.
Volume :
4
Co-Authors:
Warrington, D., Institute of Soils and Water ARO, The Volcani Center, P.O. Box 6 Bet Dagan, 50250, Israel
Shainberg, I., Institute of Soils and Water ARO, The Volcani Center, P.O. Box 6 Bet Dagan, 50250, Israel
Levy, G.J., Institute of Soils and Water ARO, The Volcani Center, P.O. Box 6 Bet Dagan, 50250, Israel
Bar-Or, Y., Institute of Life Science Division of Microbial, Molecular Ecology The Hebrew University of Jerusalem, Jerusalem, Israel
Facilitators :
From page:
79
To page:
91
(
Total pages:
13
)
Abstract:
Seals forming at the soil surface during rainstorms reduce water penetration and increase runoff in many arid and semi-arid regions. The effect of surface application of an anionic polysaccharide (designated F-Ac), synthesized by the filamentous cyanobacterium Anabaenopsis circularis PCC 6720, on infiltration rate (IR), runoff and erosion of three soils during simulated rainstorms, was studied. The interaction between F-Ac and electrolyte concentration at the soil surface was studied by using distilled water (DW) or tap water (TW) or by spreading phosphogypsum (PG) on the soil surface. F-Ac added at the rate of 3.4 kg ha-1 together with PG at the rate of 5 t ha-1 was the most efficient treatment in improving infiltration and reducing runoff and erosion. This treatment reduced runoff, from the three soils studied, from 65-80% in the control to 14-24%. Soil loss was reduced from 3.6-4.5 Mg ha-1 in the control to 0.5-1.3 Mg ha-1 in the treated soils. DW treatment, singly and in combination with F-Ac, was quite inefficient in preventing seal formation and in reducing runoff and soil loss. Adding F-Ac with TW maintained final IR and runoff levels intermediate between those of F-Ac with PG and those of F-Ac with DW. Electrolytes in the soil surface which flocculated soil clay, enhanced the beneficial effect of F-Ac on aggregate stability and thus greatly reduced water and soil losses. The efficacy of F-Ac as a stabilizing agent (i.e., soil conditioner) wore out during three consecutive storms of 60 mm each. © 1991.
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DOI :
10.1016/0933-3630(91)90041-K
Article number:
0
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
21489
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:44
Scientific Publication
Polysaccharide and salt effects on infiltration and soil erosion. A rainfall simulation study
4
Warrington, D., Institute of Soils and Water ARO, The Volcani Center, P.O. Box 6 Bet Dagan, 50250, Israel
Shainberg, I., Institute of Soils and Water ARO, The Volcani Center, P.O. Box 6 Bet Dagan, 50250, Israel
Levy, G.J., Institute of Soils and Water ARO, The Volcani Center, P.O. Box 6 Bet Dagan, 50250, Israel
Bar-Or, Y., Institute of Life Science Division of Microbial, Molecular Ecology The Hebrew University of Jerusalem, Jerusalem, Israel
Polysaccharide and salt effects on infiltration and soil erosion. A rainfall simulation study
Seals forming at the soil surface during rainstorms reduce water penetration and increase runoff in many arid and semi-arid regions. The effect of surface application of an anionic polysaccharide (designated F-Ac), synthesized by the filamentous cyanobacterium Anabaenopsis circularis PCC 6720, on infiltration rate (IR), runoff and erosion of three soils during simulated rainstorms, was studied. The interaction between F-Ac and electrolyte concentration at the soil surface was studied by using distilled water (DW) or tap water (TW) or by spreading phosphogypsum (PG) on the soil surface. F-Ac added at the rate of 3.4 kg ha-1 together with PG at the rate of 5 t ha-1 was the most efficient treatment in improving infiltration and reducing runoff and erosion. This treatment reduced runoff, from the three soils studied, from 65-80% in the control to 14-24%. Soil loss was reduced from 3.6-4.5 Mg ha-1 in the control to 0.5-1.3 Mg ha-1 in the treated soils. DW treatment, singly and in combination with F-Ac, was quite inefficient in preventing seal formation and in reducing runoff and soil loss. Adding F-Ac with TW maintained final IR and runoff levels intermediate between those of F-Ac with PG and those of F-Ac with DW. Electrolytes in the soil surface which flocculated soil clay, enhanced the beneficial effect of F-Ac on aggregate stability and thus greatly reduced water and soil losses. The efficacy of F-Ac as a stabilizing agent (i.e., soil conditioner) wore out during three consecutive storms of 60 mm each. © 1991.
Scientific Publication
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