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פותח על ידי קלירמאש פתרונות בע"מ -
Water quality and sodicity effects on soil bulk density and conductivity in interrupted flow
Year:
2002
Source of publication :
Soil Science
Authors :
לוי, גיא
;
.
Volume :
167
Co-Authors:
Levy, G.J., Inst. of Soil, Water/Environ. Sci., ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Sharshekeev, N., Inst. of Soil, Water/Environ. Sci., ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Zhuravskaya, G.L., Inst. of Soil, Water/Environ. Sci., ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
692
To page:
700
(
Total pages:
9
)
Abstract:
Interruption of flow during furrow irrigation (e.g., use of surge technique) consolidates soil near the furrow surface, causing reorientation and rearrangement of soil particles, and leads to increased surface bulk density (BD) and reduced hydraulic conductivity (HC) of this surface layer. We hypothesized that soil consolidation could be affected by irrigation water quality and soil sodicity. We studied in the laboratory changes in the BD and HC of an alfisol (Calcic Haploxeralf) and two vertisols (Chromic Haploxerert) having different exchangeable sodium percentage (ESP) levels that were subjected to five cycles of leaching and draining under matric potential of up to -5 J kg-1. Four different water qualities (electrical conductivity (EC) of 0.01, 0.95, 2.0, and 4.0 dS m-1) were tested. Final BD was significantly greater than the initial value when matric potential was applied. Conversely, for continuous leaching (i.e., no application of matric potential), differences between final and initial BD were insignificant. Water quality and sodicity did not affect BD, suggesting that for a given soil exposed to a low level of matric potential, soil consolidation was not affected by water quality or ESP. Final HC values were always lower than initial ones, with the decrease in HC after application of matric potential being by far greater than that observed when continuous leaching was used. The decrease in HC relative to initial HC depended on both water quality, and soil sodicity, was greater with the decrease in water EC and an increase in ESP. Adverse effects of low EC and high ESP on HC were less pronounced in matric potential application than in continuous leaching. Our results suggest that the quality of water available for irrigation and soil sodicity should be taken into account in cases where interrupted flow is considered for improving furrow irrigation efficiency via reducing soil infiltration rate.
Note:
Related Files :
Bulk density
Electrical conductivity
hydraulic conductivity
Interrupted flow
Sodicity
soil property
Soil water
water quality
עוד תגיות
תוכן קשור
More details
DOI :
10.1097/00010694-200210000-00007
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
25632
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:16
Scientific Publication
Water quality and sodicity effects on soil bulk density and conductivity in interrupted flow
167
Levy, G.J., Inst. of Soil, Water/Environ. Sci., ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Sharshekeev, N., Inst. of Soil, Water/Environ. Sci., ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Zhuravskaya, G.L., Inst. of Soil, Water/Environ. Sci., ARO, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Water quality and sodicity effects on soil bulk density and conductivity in interrupted flow
Interruption of flow during furrow irrigation (e.g., use of surge technique) consolidates soil near the furrow surface, causing reorientation and rearrangement of soil particles, and leads to increased surface bulk density (BD) and reduced hydraulic conductivity (HC) of this surface layer. We hypothesized that soil consolidation could be affected by irrigation water quality and soil sodicity. We studied in the laboratory changes in the BD and HC of an alfisol (Calcic Haploxeralf) and two vertisols (Chromic Haploxerert) having different exchangeable sodium percentage (ESP) levels that were subjected to five cycles of leaching and draining under matric potential of up to -5 J kg-1. Four different water qualities (electrical conductivity (EC) of 0.01, 0.95, 2.0, and 4.0 dS m-1) were tested. Final BD was significantly greater than the initial value when matric potential was applied. Conversely, for continuous leaching (i.e., no application of matric potential), differences between final and initial BD were insignificant. Water quality and sodicity did not affect BD, suggesting that for a given soil exposed to a low level of matric potential, soil consolidation was not affected by water quality or ESP. Final HC values were always lower than initial ones, with the decrease in HC after application of matric potential being by far greater than that observed when continuous leaching was used. The decrease in HC relative to initial HC depended on both water quality, and soil sodicity, was greater with the decrease in water EC and an increase in ESP. Adverse effects of low EC and high ESP on HC were less pronounced in matric potential application than in continuous leaching. Our results suggest that the quality of water available for irrigation and soil sodicity should be taken into account in cases where interrupted flow is considered for improving furrow irrigation efficiency via reducing soil infiltration rate.
Scientific Publication
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