Summary
Trials were carried out in two years on a sandy loam and on a heavy clay soil with two cultivars to examine the potential of chloride fertilization as a tool to reduce blackspot susceptibility of potatoes and to investigate other effects on yield and quality. Blackspot susceptibility was significantly reduced in cv. Marijke, but not in cv. Bintje as a result of increasing doses of applied chloride from 0 to 400 kg ha1. Dry matter concentration, assessed as under-water weight, was reduced by chloride in both cultivars at the two locations. Fry colour of French fries was improved by chloride.
Applying 400 kg ha−1 Cl− to both soil types decreased net tuber yield >35 mm of cv. Bintje but not of cv. Marijke. Chloride caused slower emergence, retarded crop development and less stems per plant on the sandy loam soil but not on the heavy clay soil.
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Van Loon, C.D., Van Den Berg, W. The effect of chloride fertilization on blackspot susceptibility and other quality characteristics and on yield of potato. Potato Res 46, 147–154 (2003). https://doi.org/10.1007/BF02736084
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DOI: https://doi.org/10.1007/BF02736084