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QUALITY ASSESEMENT OF AMANGWU-EDDA STREAM AND ITS TRIBUTARIES FOR RICE PRODUCTION UNDER IRRIGATION
Abstract
Rice is one food that has solved the food security problems of many densely populated countries like China,
India, Thailand and South Korea, etc. Inadequate and uneven distribution of rainfall and declining soil fertility
are among the major challenges militating against increase in rice production in Sub-Sahara Africa. The
problems associated with rainfall can be addressed through irrigation, a concept that involves the artificial
application of water to the land in accordance with 'crop requirement', throughout the 'crop period', for fullfledged
nourishment of the crop. Water sources to be used for rice production under irrigation in Amangwu-Edda,
Afikpo-South Local Government Area (LGA) of Ebonyi State, South-East Nigeria were evaluated for their
quality in terms of salt content. Laboratory results revealed that the water samples had mean pH value of 7.04 and
Ca, Mg and Na values of 18.03mg/l, 6.07mg/l, and 1.75mg/l respectively. Similarly, mean SAR, K, SO CL, TDS, 4,
and EC were 0.913meq/l, 2.05mg/l, 202.5mg/l, 99.715mg/l, 1,001.4mg/l and 6.3x10-5respectively. The result
indicates that the water quality is safe for irrigated rice production. Similarly the mapping units studied are
predominantly clay loamy, which is very ideal for irrigated rice production, but primary nutrients were generally
low, and should be supplemented with organic or inorganic fertilizer.
