Comparative evaluation of methods for estimation of soil salinity
Estimation methods for soil salinity
DOI:
https://doi.org/10.21921/jas.v10i01.12251Keywords:
soil salinity, soil water extract, saturation extract, electrical conductivityAbstract
Different methods to estimate electrical conductivity (EC) of saturated soil paste extract (ECe) of 1:2 and 1:5 soil: water suspensions were evaluated. Soil samples were taken from different depths (viz. 0-15, 15-30, 30-45, 45-60, and 60-90 cm) of the wheat field under irrigated saline regimes ranging from 1.5 to 12 dSm-1. The relationship between the electrical conductivity of saturated paste extract (ECe) and soil-water suspension extracts (i.e., EC1:2 and EC1:5) was established beside the development of regression models and conversion factors. Regression models relating ECe with EC1:2, EC1:5 were developed with coefficients of determination (R2) 0.98 and 0.99 respectively. The average conversion factor between ECe~ EC1:2 and ECe~ EC1:5 were 2.7 and 7.7, respectively. Methods standardized in the study can be used to estimate the EC of different saturated soil paste extract ratios, which will be less cumbersome and significantly reduce the estimation time.
References
Allison L E, Brown J W, Hayward H E, Richards L A, Bernstein L, Fireman M, Pearson GA, Wilcox, L V, Bower C A, Hatcher J T and Reeve R C. 1954. Diagnosis and improvement of saline and alkali soils. Agric. Handbook No. 60, United States Department of Agriculture.
Amakor X N, Jacobson A R, Cardon G E and Hawks A. 2014. A comparison of salinity measurement methods based on soil saturated pastes. Geoderma 219–220:32–39.
Charman P E V, Murphy B W. 2007. Soils: Their Properties and Management. Oxford University Press, South Melbourne.
Chi C M and Wang Z C. 2010. Characterizing salt-affected soils of Songnen Plain using saturated paste and 1:5 soil-to-water extraction methods. Arid Land Research and Management 24:1–11.
Franzen D. 2003. Managing Saline Soils in North Dakota. North Dakota State University Extension Service, Fargo.
He Y, DeSutter T, Prunty L, Hopkins D, Jia X, Wysocki D A. 2012. Evaluation of 1:5 soil to water extract electrical conductivity methods. Geoderma 185-186:12–17.
Hog T J and Henry J L. 1984. Comparison of 1:1 and 1:2 suspensions and extracts with the saturation extract in estimating salinity in Saskatchewan soils. Canadian Journal of Soil Science 64:699-704.
Khorsandi F and Yazdi F A. 2011. Estimation of saturated paste extracts’ electrical conductivity from 1:5 soil/ water suspension and gypsum. Communications in Soil Science and Plant Analysis 42:315-321.
Khorsandi F and Yazdi F A. 2007. Gypsum and texture effects on the estimation of saturated paste electrical conductivity by two extraction methods. Communications in Soil Science and Plant Analysis 38:1105–1117.
Kumar P, Sarangi A, Singh D K and Parihar S S. 2013. Water use efficiency of salt tolerant and non-tolerant wheat varieties under saline regimes. Journal of Agricultural Engineers. 50(1):47-53.
Loveday J. 1974. Methods for analysis of Irrigated soils. Farnham Royal, Buckinghamshire: Commonwealth Agricultural Bureaux.
Moriasi D N, Arnold J G, Van Liew M W, Bingner R L, Harmel R D and Veith T L. 2007. Model evaluation guidelines for systematic quantification of accuracy in watershed simulations. American Society of agricultural and Biological Engineers 50(3):885−9
Nash J E and Sutcliffe J V. 1970. River flow forecasting through conceptual models part I - A discussion of principles. Journal of Hydrology 10:282–290.
Ozcan H, Ekinci H, Yigini Y and Yuksel O. 2006. Comparison of four soil salinity extraction methods, Proceedings of 18th International Soil Meeting on Soil Sustaining Life on Earth, Managing Soil and Technology, Sanliurfa, Turkey. 697–703.
Price G. 2006. Australian Soil Fertility Manual. CSIRO Publishing and Fertilizer Industry Federation of Australia, Collingwood.
Rayment G E and Higginson F R. 1992. Australian soil and land survey handbook. Australian Laboratory Handbook of Soil and Water Chemical Methods, Inkata Press, Melbourne.
Rhoades J D, Nahid A, Manteghi P J, Shouse P J and Alves W J. 1989. Estimating soil salinity from saturated soil paste electrical conductivity. Soil Science Society of America Journal 53:428-33.
Rhoades J D. 1982. Soluble Salts. In: A. L. Page (ed.) Methods of soil analysis, Part 2 microbiological and chemical properties. Agronomy 9: 149-157.
Rhoades J D, Kandiah A and Mashali A M. 1992. The use of saline waters for crop production. Food and Agriculture Organization of the United Nations, Rome.
Richards L A. 1954. Diagnosis and improvement of saline and alkali soils. U.S. Dep. Agric. Handbook.
Slavich P G, and Petterson G H. 1990. Estimating solution extract salinity from paste electrical conductivity an evaluation of procedures. Australian Journal of Soil Research 28:517-22.
Slavich P G and Petterson G H. 1993. Estimating the Electrical Conductivity of Saturated Paste Extracts from 1:5 Soil: Water Suspensions and Texture. Australian Journal of Soil Research 31:73-81.
Sonmez S S, Buyuktas D, Okturen F and Citak S. 2008. Assessment of different soil to water ratios (1:1, 1:2.5, 1:5) in soil salinity studies. Geoderma 87:31–46.
Visconti V, Miguel dePaz J and Rubio J L. 2010. What information does the electrical conductivity of soil water extracts of 1 to 5 ratios (w/v) provide for soil salinity assessment of agricultural irrigated lands? Geoderma 154: 387–397.
Willmott C J. 1982. Some comments on the evaluation of model performance. Bulletin of the American Meteorological Society 63:1309–1313.
Zhang H, Schroder J L, Pittman J J, Wang J J and Payton M E. 2005. Soil salinity using saturated paste and 1:1 soil to water extracts. Soil Science Society of America Journal. 69(4):1146–1151.
Zhang C, Li X, Kamg Y and Wang X. 2019. Salt leaching and response of Dianthus chinensis L. to saline water drip irrigation in two coastal saline soils. Agricultural Water Management 218:8–16.
