老朽化水田土壌に関する研究(第3報) : 含鉄土の水稲に及ぼす効果について

概要

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The effect of the material with iron oxide to the aged paddy fields was studied. The results were obtaind as follows : 1. Beneficial effect of the material was found in the following order. Otaki, Nagahara, and Kenkuma "Hitetsudo" (See Table 1). 2. From the point of microscopical view, the effect of these materials was well in accordance with the progress of claynification; and, from the point of chemical, the effect was with the amounts of excangeable bases, soluble silica, but not with the amount of iron oxide. 3. The absorbed amount of silica, magnesium in the rice-plant was much in accordance with the rice-yield, but not the amount of iron. In the aged paddy field area (Granite series), the low-yield of rice-plant was due to not only the rack of iron oxide, but the outbreak of rice-wilting diesase owing to the rack of soluble silica in the paddy soils. It was seemed that materials much contained soluble silica, magnesium as well as iron oxide had to be applied to the aged paddy field.
社団法人日本土壌肥料学会の論文
1956-05-05