Soil salinity and sodicity are major factors limiting agricultural productivity in irrigation schemes located in semi-arid areas. A study was conducted to assess the quality of irrigation water used in Mutema Irrigation Scheme located in south-east Zimbabwe to understand how irrigation water quality is related to the chemical quality of soils in the scheme. Irrigation water samples were collected from groundwater and surface sources in 2012 and their hydrochemistry determined while soil samples were collected from irrigated and non-irrigated parts of the scheme in 2006 and 2012 and analysed for selected chemical properties. The results indicated that the groundwater had high concentrations of Na + (4.35 mg/l), Mg 2+ (4.75 mg/l), Cl - (3.6 mg/l) and Electrical Conductivity (EC) (1729 Msm/cm) compared to the surface irrigation water source which had 0.72 mg/l Na + , 2.25 mg/l Mg 2+ , 0.78 mg/l Cl - and 594 Msm/cm EC. The soils in the scheme had higher levels of pH, Sodium Adsorp tion Ratio (SAR), Exchangeable Sodium Percentage (ESP) and EC which in some blocks exceeded the threshold requirements for cropping. It was found that pH, SAR and ESP were significantly higher ( p < 0.05 ) in irrigated blocks compared to non-irrigated areas of the scheme, indicating an influence of irrigation water on soils characteristics in irrigated plots. Mg 2+ and Ca 2+ in the soils positively correlated with Na + (r 2 = 0.67 and r 2 = 0.57 respectively). The results indicated that the groundwater presents a chloride hazard to the soils in the scheme which are becoming saline and therefore require proper management and choice of crops to sustain crop production.
KeywordsMutemaIrrigation SchemeSalinityIrrigation Water QualitySARESP
M. S. Yidana, P. A. Sakyi and G. Stamp, “Analysis of the Suitability of Surface Water for Irrigation Purposes: The Southwest and Coastal River Systems in Ghana,” Journal of Water Resources and Protection, Vol. 3, No. 1, 2011, pp. 695-710. http://dx.doi.org/10.4236/jwarp.2011.310080
A. K. Fasedja, “Eastern and Southern African Agricultural Systems: A Problem Perspecitive,” Kilwood Publications, Nairobi, 1999.
G Fipps, “Irrigation Water Quality Standards and Salinity Management Strategies,” Texas Cooperaive Extension Services, 2007.
F. Bouksila, A. Bahri, R. Berndtsson, M. Persson, J. Rozema and S. E. A. T. M. Van der Zee, “Assessment of soil salinization risks under irrigation with brackish water in semiarid Tunisia,” Environmental and Experimental Botany, Vol. 92, 2013, pp. 176-185. http://dx.doi.org/10.1016/j.envexpbot.2012.06.002
P. Verwey and P. Vermeulen, “Influence of Irrigation on the Level, Salinity and Flow of Groundwater at Vaalharts Irrigation Scheme,” Water SA, Vol. 37, No. 2, 2011, pp. 155-164. http://dx.doi.org/10.4314/wsa.v37i2.65861
R. Munns, “Genes and Salt Tolerance: Bringing Them Together,” New Phytologist, Vol. 167, No. 3, 2005, pp. 645-663. http://dx.doi.org/10.1111/j.1469-8137.2005.01487.x
FAO, “Global Network on Integrated Soil Management for Sustainable Use of Salt-Affected Soils,” FAO Land and Plant Nutrition Management Service, Rome, 2005.
V. N. L. Wong, R. S. B. Greene, R. C. Dalal and B. W. Murphy, “Soil Carbon Dynamics in Saline and Sodic Soils: A Review,” Soil Use and Management, Vol. 26, No. 1, 2010, pp. 2-11. http://dx.doi.org/10.1111/j.1475-2743.2009.00251.x
R. Setia, P. Gottschalk, P. Smith, P. Marschner, J. Baldock, D. Setia and J. Smith, “Soil Salinity Decreases Global Soil Organic Carbon Stocks (In Press),” Science of The Total Environment, 2012.
D. N. Rietz and R. J. Haynes, “Effects of Irrigation-Induced Salinity and Sodicity on Soil Microbial Activity,” Soil Biology and Biochemistry, Vol. 35, No. 6, 2003, pp. 845-854. http://dx.doi.org/10.1016/S0038-0717(03)00125-1
A. ünlükara, A. Kurunc, G. D. Kesmez, E. Yurtseven and D. L. Suarez, “Effects of Salinity on Eggplant (Solanum melongena L.) Growth and Evapotranspiration,” Irrigation and Drainage, Vol. 59, No. 2, 2010, pp. 203-214.
M. Seilsepour, M. Rashidi and B. Khabbaz, “Prediction of Soil Exchangeable Sodium Percentage Based on Soil Sodium Adsorption Ratio,” American-Eurasian Journal of Agriculture & Environmental Science, Vol. 5, No. 1, 2009, pp. 1-4.
H. Rahimi, E. Pazira and F. Tajik, “Effect of Soil Organic Matter, Electrical Conductivity and Sodium Adsorption Ratio on Tensile Strength of Aggregates,” Soil & Tillage Research, Vol. 54, No. 3-4, 2000, pp. 145-153. http://dx.doi.org/10.1016/S0167-1987(00)00086-6
R. S. Ayers and D. W. Westcot, “Water Quality for Agriculture,” FAO Irrigation and Drainage Paper No. 29, Rome, 1985.
A. O. Affullo, “Irrigation Suitability Assessment of Effluents from West Kano Rice Irrigation Scheme, Kisumu, Kenya,” Ethiopian Journal of Environmental Studies and Management, Vol. 2, No. 2, 2009, pp. 1-11.
D. Nyamapfene, “The Soils of Zimbabwe,” Nehanda Publishers, Harare, 1984.
C. Cocozza, C. Pulvento, A. Lavini, M. Riccardi, R. d’Andria and R. Tognetti, “Effects of Increasing Salinity Stress and Decreasing Water Availability on Ecophysiological Traits of Quinoa (Chenopodium quinoa Willd.) Grown in a Mediterranean-Type Agroecosystem,” Journal of Agronomy and Crop Science, Vol. 199, No. 4, 2013, pp. 229-240. http://dx.doi.org/10.1111/jac.12012
J. Letey and G. L. Feng, “Dynamic versus Steady-State Approaches to Evaluate Irrigation Management of Saline Waters,” Agricultural Water Management, Vol. 91, No. 1-3, 2007, pp. 1-10. http://dx.doi.org/10.1016/j.agwat.2007.02.014
U. Seeboonruang, “Relationship between Groundwater Properties and Soil Salinity at the Lower Nam Kam River Basin in Thailand,” Environmental Earth Sciences, Vol. 69, No. 6, 2013, pp. 1803-1812. http://dx.doi.org/10.1007/s12665-012-2012-5
N. Matthews, B. Grové, J. Barnard and L. van Rensburg, “Modelling the Economic Tradeoffs between Allocating Water for Crop Production or Leaching for Salinity Management,” Water SA, Vol. 36, No. 1, 2010, pp. 37-44. http://dx.doi.org/10.4314/wsa.v36i1.50905
F. Mapanda and S. Mavengahama, “Assessment of Selected Soil Nutrients and Irrigation Water Quality in the Dryland Area of Chivi District, Zimbabwe,” Scientific Research & Essays, Vol. 6, No. 14, 2011, pp. 2918-2927.
E. Bresler, “Transport of Salts in Soils and Subsoils,” Agricultural Water Management, Vol. 4, No. 1-3, 1981, pp. 35-62. http://dx.doi.org/10.1016/0378-3774(81)90043-3
C. R. Aza-Gnandji, Y. Xu, L. Raitt and J. Levy, “Salinity of Irrigation Water in the Philippi Farming Area of the Cape Flats, Cape Town, South Africa,” Water SA, Vol. 39, No. 2, 2013, pp. 199-210.
J. M. Makhadho, “An Analysis of Water Management Performance in Smallholder Irrigation Schemes in Zimbabwe,” University of Zimbabwe, Harare, 1994.
G. Diemer, “Management Processes on Two Small-Holder Sprinkler Layouts: A Case Study from Zimbabwe,” Irrigation and Drainage Systems, Vol. 14, No. 3, 2000, pp. 183-197. http://dx.doi.org/10.1023/A:1026525329369
I. Samakande, A. Senzanje and E. Manzungu, “Sustainable Water Management in Smallholder Irrigation Schemes: Understanding the Impact of Field Water Management on Maize Productivity on Two Irrigation Schemes in Zimbabwe,” Physics and Chemistry of the Earth, Vol.29, No. 15-18, 2004, pp. 1075-1081. http://dx.doi.org/10.1016/j.pce.2004.08.009
I. Nyagumbo and J. Rurinda, “An Appraisal of Policies and Institutional Frameworks Impacting on Smallholder Agricultural Water Management in Zimbabwe,” Physics and Chemistry of the Earth, Vol. 47-48, 2012, pp. 21-32. http://dx.doi.org/10.1016/j.pce.2011.07.001
T. H. Podmore, R. J. McConnen and A. Hungwe, “Small-Scale and Smallholder Irrigation in Zimbabwe: Analysis of Opportunities for Improvements,” Water Management Synthesis Report 48, 1986.
M. M. Sikwela, “Determinants of Household Food Security in the Semi-Arid Areas of Zimbabwe: A Case Study of Irrigated and Non-Irrigated Farmers in Lupane and Hwange Districts,” University of South Africa, 2008.
G. Nyamadzawo, M. Wuta, J. Nyamangara and D. Gumbo, “Opportunities for Optimization of In-Field Water Harvesting to Cope with Changing Climate in Semi-Arid Smallholder Farming Areas of Zimbabwe,” Springer Plus, Vol. 2, No. 100, 2013, pp. 1-9.
N. Mujere, B. Chazovachii, G. Chifodya and A. Mushuku, “Evaluating the Factors Influencing the Variation of Irrigated Wheat Yields: A Case Study of Chinyamutumwa Irrigation Scheme in Zimbabwe,” Journal of Sustainable Development in Africa, Vol. 13, No. 14, 2011, pp. 177-188.
E. Manzungu, “Water for Agriculture in Zimbabwe: Policy and Management Options for the Smallholder Sector,” University of Zimbabwe, Harare, 1999.
H. Bjornlund, “Is Water and Land Redistribution a Driver of Economic Growth and Poverty Reduction? Lessons from Zimbabwe,” Water International, Vol. 34, No. 2, 2009, pp. 217-229. http://dx.doi.org/10.1080/02508060902855599
K. Nhundu, C. Gwata and A. Mushunje, “Impacts of Zimbabwe European Union Micro-Project Programme (ZIM/EU MPP) in Funding Smallholder Irrigation Projects on Food Security and Income Levels: A Case Study of Mopane Irrigation Scheme in Zvishavane, Midlands Province, Zimbabwe,” African Journal of Agricultural Research, Vol. 5, No. 14, 2010, pp. 1759-1771.
R. O’Duk and B. Banda, “Irrigation Design for Mutema Irrigation Scheme,” FAO and AREX, Harare, 1994.
L. Chidoko, “A History of Mutema Irrigation Scheme, 1928-1972,” University of Zimbabwe, Harare, 2010.
I. P. Anderson, P. J. Brinne, M. Moyo and B. Nyamwanza, “Physical Resource Inventory of Communal Lands of Zimbabwe—An Overview,” NRI Bulletin 60, NRI, Harare, 1993.
R. J. Okalebo, K. W. Gathua and P. L. Woomer, “Laboratory Methods for Soil and Plant Analysis: A Working Manual,” 2nd Edition, TSBF-CIAT and SACRED Africa, Nairobi, 2002.
R Core Team, “R: A Language and Environment for Statistical Computing,” R Foundation for Statistical Computing, Vienna, 2013.
E. Yurtseven, G. D. Kesmez and A. ünlükara, “The Effects of Water Salinity and Potassium Levels on Yield, Fruit Quality and Water Consumption of a Native Central Anatolian Tomato Species (Lycopersicon esculantum),” Agricultural Water Management, Vol. 78, No. 1-2, 2005, pp. 128-135. http://dx.doi.org/10.1016/j.agwat.2005.04.018
A. Latef, A. A. Hamed and C. He, “Effect of Arbuscular Mycorrhizal Fungi on Growth, Mineral Nutrition, Antioxidant Enzymes Activity and Fruit Yield of Tomato Grown under Salinity Stress,” Scientia Horticulturae, Vol. 127, No. 3, 2011, pp. 228-233. http://dx.doi.org/10.1016/j.scienta.2010.09.020
G. Psarras, M. Bertaki and K. Chartzoulakis, “Response of Greenhouse Tomato to Salt Stress and K+ Supplement,” Plant Biosystems, Vol. 142, No. 1, 2008, pp. 149-153. http://dx.doi.org/10.1080/11263500701872903
A. ünlükara, A. Kurunc, G. Kesmez and E. Yurtseven, “Growth and Evapotranspiration of Okra (Abelmoschus Esculentus L.) as Influenced by Salinity of Irrigation Water,” Journal of Irrigation and Drainage Engineering, Vol. 134, No. 2, 2008, pp. 160-166. http://dx.doi.org/10.1061/(ASCE)0733-9437(2008)134:2(160)
N. Katerji, J. W. van Hoorn, A. Hamdy and M. Mastrorilli, “Salt Tolerance Classification of Crops According to Soil Salinity and to Water Stress Day Index,” Agricultural Water Management, Vol. 43, No. 1, 2000, pp. 99-109. http://dx.doi.org/10.1016/S0378-3774(99)00048-7
B. D. Seelig, J. L. Richardsen and W. T. Barker, “Characteristics and Taxonomy of Sodic Soils as a Function of Landscape Position,” 2005. http://www.soilscisoc.ndsu.edu.html
G. Murtaza, B. Murtaza, H. M. Usman and A. Ghafoor, “Amelioration of Saline-Sodic Soil Using Gypsum and Low Quality Water in Following Sorghum-Berseem Crop Rotation,” International Journal of Agriculture and Biology, Vol. 15, No. 4, 2013, pp. 640-648.
M. T. Dastorani, M. Heshmati and M. A. Sadeghzadeh, “Evaluation of the Efficiency of Surface and Subsurface Irrigation in Dryland Environments,” Irrigation and Drainage, Vol. 59, No. 2, 2010, pp. 129-137.
D. Love, P. van der Zaag, S. Uhlenbrook and R. J. S. Owen, “A Water Balance Modelling Approach to Optimising the Use of Water Resources in Ephemeral Sand Rivers,” River Research and Applications, Vol. 27, No. 7, 2011, pp. 908-925.
S. van der Kooij, M. Zwarteveen, H. Boesveld and M. Kuper, “The Efficiency of Drip Irrigation Unpacked,” Agricultural Water Management, Vol. 123, 2013, pp. 103-110. http://dx.doi.org/10.1016/j.agwat.2013.03.014
W. de Lange, B. Mahumani, M. Steyn and S. Oelofse, “Monetary Valuation of Salinity Impacts and Microbial Pollution in the Olifants Water Management Area, South Africa,” Water SA, Vol. 38, No. 2, 2012, pp. 241-248. http://dx.doi.org/10.4314/wsa.v38i2.9
H. C. Komakech, M. Condon and P. van der Zaag, “The Role of Statutory and Local Rules in Allocating Water between Large- and Small-Scale Irrigators in an African River Catchment,” Water SA, Vol. 38, No. 1, 2012, pp. 115-126. http://dx.doi.org/10.4314/wsa.v38i1.14
M. Chilundo, P. Kelderman and J. H. ókeeffe, “Design of a Water Quality Monitoring Network for the Limpopo River Basin in Mozambique,” Physics and Chemistry of the Earth, Vol. 33, No. 8-13, 2008, pp. 655-665.