Effects of cultivation methods on the occurrence of internal brown spot and hollow heart in potato tubers.

摘要

To decrease the occurrence of internal brown spot (IBS) and hollow heart (HH), an investigation of the N and Ca levels, planting density, and soil covering depth of processing potato (Solanum tuberosum, cv. Atlantic) was conducted. High occurrencesof IBS and HH were observed upon treatment with 150 kg N/ha. As the Ca level increased to 150 kg/ha, only 3.5% IBS occurred in the alpine area of Daekwallyung. However, there was no significant difference between the low land area of Kangnung and the control (17.3%). HH occurrence was not affected upon treatment with Ca. Less IBS and HH occurred as the spacings between plants were narrowed to 75 x 20 cm and 75 x 15 cm compared with the conventional spacing of 75 x 25 cm. The physiological disorders occurred less frequently when the soil depth covering the stem was > 10 cm.