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חיפוש מתקדם
Nadler, A., Dept. of Soil Physical Chemistry, Soil and Water Institute, Volcani Center, Bet Dagan, 50250, Israel
Erner, Y., Dept. of Citriculture, Institute of Horticulture, Volcani Center, Bet Dagan, 50250, Israel
During a 6-year salinity experiment in a citrus (Shamouti) grove, 3 salinity levels of irrigation water (0.8, 1.3, and 1.7 dS/m) were used. Measured salinity levels depended on the monitoring technique, aqueous extract (Ext) v. electrical resistance (4 electrode method, 4P), and consistently differed by up to 50%. The main advantages of the resistivity method over sampling are: specific consideration of the actual water content at time of measurement, minimal disturbance of the natural soil structure and chemical composition, and a reduced spatial variability due to the possibility of repeated measurements at one spot. Despite massive salt inputs (12x103-36x103 mmol charge(+)/ha), the final salinity levels, even according to the higher estimating resistivity method, were moderate, and during the 6 years had no significant effect on yield. It could thus be categorised as being either below or above the yield-reducing threshold value, depending on the measuring technique.
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הספר "אוצר וולקני"
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תנאי שימוש
Monitoring salinity of the soil solution in a citrus orchard: The 4P technique revisited
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Nadler, A., Dept. of Soil Physical Chemistry, Soil and Water Institute, Volcani Center, Bet Dagan, 50250, Israel
Erner, Y., Dept. of Citriculture, Institute of Horticulture, Volcani Center, Bet Dagan, 50250, Israel
Monitoring salinity of the soil solution in a citrus orchard: The 4P technique revisited
During a 6-year salinity experiment in a citrus (Shamouti) grove, 3 salinity levels of irrigation water (0.8, 1.3, and 1.7 dS/m) were used. Measured salinity levels depended on the monitoring technique, aqueous extract (Ext) v. electrical resistance (4 electrode method, 4P), and consistently differed by up to 50%. The main advantages of the resistivity method over sampling are: specific consideration of the actual water content at time of measurement, minimal disturbance of the natural soil structure and chemical composition, and a reduced spatial variability due to the possibility of repeated measurements at one spot. Despite massive salt inputs (12x103-36x103 mmol charge(+)/ha), the final salinity levels, even according to the higher estimating resistivity method, were moderate, and during the 6 years had no significant effect on yield. It could thus be categorised as being either below or above the yield-reducing threshold value, depending on the measuring technique.
Scientific Publication
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