Behavior of Sodium Chlorate in Different Soil Types in Forest Land

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The herbicidal activity and persistence of sodium chlorate (NaClO3, 50%) was investigated in following types of forest soils; BC, BD, BE and B1C soils, in relation to the distribution of Kumai sasa (Sasa Paniculata) rhizome in the soils.1. The herbicidal activity of sodium chlorate appears remarkably in BC soils but it is not so remarkable in both type of BE and B1C soils.2. The persistence of sodium chlorate was about 60 days in BC soil, but that in both BE and B1C soils was not so long (about 14-21 days).3. Kumai sasa rhizome is shallowly distributed in the surface of weakly dried brown forest soils (0-10cm depth) but it is distributed deeply reaching 30cm depth in rather wet soils like BE and B1C soils. The herbicidal activity of sodium chlorate on Kumai sasa with deeply distributed rhizome is less than that on it with shallowly distributed rhizome.
日本雑草学会の論文