Salt distribution and accumulation as affected by drip irrigation treatments for tomatoes grown inside plastic houses
1987
Judah, O.M. | Taimeh, A.Y. | Suwwan, M.A. (Jordan Univ., Amman (Jordan))
For two consecutive seasons, effect of irrigation frequency (4 and 7 days) and water application rate (2, 4 and 6 lph) on salt accumulation and yield of plastic house tomato were studied using a split-plot design. Salt accumulation increased in the soil surface (10 cm depth) for all treatments as distance from the dripper increased. The electrical conductivity increased from less than 1 ds/m to about 3 ds/m during the first season. Also salt accumulated but to less extent at the depth of 15 cm; below this depth no indication of salt accumulation was traced. Second season data exhibited a similar pattern of salt accumulation but the salt accumulated at a deeper level. Results also suggested that the salt content, regardless of water treatment, was reduced around the tomato plants. The frequency of water application showed significant effects on the salt contents within 10 cm from the drippers; effect of application rate, however, was clear to distance of 25 cm away. Tomato yield decreased from 191 (1st season) to 155 (2nd season) ton/ha. This reduction in yield may be due to the salt accumulation in the 2nd season. Regardless of the reduction, data for the separate seasons indicated that yields were not affected by both frequency and rate of irrigation
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