Yield reduction and arsenic accumulation in potatoes (Solanum tuberosum L.) in an arsenic contaminated soil
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Universidad Nacional de Colombia
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The different levels of arsenic (As) had a significant effect on the yield, yield reduction and As accumulation of different potato varieties. The yield was negatively affected by the As contami - nation and decreased with the increasing As levels in the soil, but remained statistically similar up to 25 mg kg -1 soil of As and thereafter drastically decreased with the increasing As levels. The yield reduction (%) and accumulation of As in the tuber peels and f lesh increased with the increasing As levels. Among the fourteen potato varieties, ‘Felsina’ had the maximum yield and showed the lowest percentage of yield reduction; ‘Jam alu’ and ‘Cardinal’ accumulated the least amount of As in their peels and f lesh, respectively. Among the treatment combina - tions, ‘Felsina’ cultivated in an As-free soil had the highest yield/plant (454.8 g fresh weight). ‘Laura’ grown in 25 mg kg -1 soil of As showed the lowest yield reduction (%). Although ‘Jam alu’ and ‘Cardinal’ produced a slightly lower yield compared to some other varieties, these two varieties accumulated the least amount of As, both in the peels and f lesh, when grown in 25 mg kg -1 soil of As
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