| 摘要 |
PROBLEM TO BE SOLVED: To obtain a cleaning agent for an irrigation tube used in a hydroponic soil system or a hydroponic system, having an enough cleaning effect and scarcely having effects on a cultivated crop so as to be safe. SOLUTION: This cleaning agent for the irrigation tube is used in the hydroponic soil system or the hydroponic system, wherein the cleaning agent for the irrigation tube comprises (a) a peroxodisulfate salt and (b) at least one kind of hydroxycarboxylic acid selected from a group comprising citric acid and malic acid, and contains the hydroxycarboxylic acid in an amount of 1-9 pts.wt. based on 1 pt.wt. of the peroxodisulfate salt. COPYRIGHT: (C)2004,JPO&NCIPI
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