土壌のアンモニウム固定に就いて : IV アンモニウム固定に及ぼす陽イオンの影響

概要

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1. It was found that washing soil with dilute acid reduces markedly the fixation capacity of ammonium in soil, but not absorption capacity. Ba- or Ca-soil prepared from H-soil is similar in fixation or absorption capacity to the H-soil. 2. In a micaceous soil (No. 431) from Akizuki in Fukuoka Prefecture, H-soil has higher absorption capacity than original soil. 3. Soil saturated with Ca or Na ions fixes about same amount of ammonium as in original soil, but that saturated with Li, Mg or Ba ions has less than the latter, and K-soil has no fixing power of ammonium. The order of homoionic soils in fixation capacity is approximately as follows ; Na > Ca > Li > Mg > Ba > H > K 4. Aside from H-soil the order of homoionic soils in the absorption capacity is similar to that in the fixation capacity. 5. Ba ions were fixed in soil No. 431 in moist state, but Mg ions were not. 6. It could be explained that the reduction in the fixation capacity by extract with potassium or barium chloride solution is due to being occupied fixing spots on the surface of crystal lattice layer with potassium or barium ions, but this hypothesis is not applicable to the cases of Mg-soil and H-soil. 7. It appears likely that the eluviation causes low fixation capacity of ammonium in surface soil.
社団法人日本土壌肥料学会の論文
1952-11-10