土壌中の鉄礬土による燐酸固定能に就て(第1報) : 鉄礬土による燐酸固定作用に及ぼす腐植の影響

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The ability of Humus and Lignin to prevent phosphate fixation is already recongnized as well as certain organic ions. In this experiment the writers investigated the effectiveness of Humic acids, Hymatomelanic acids, crude humic acids and some of non-humic constituents in preventing phosphate precipitation by iron and aluminum. 1. The results are summerised as follows : The influence of Humic acids, Hymatomelanic acids and crude Humic acids is considerably marked. It seems that the order of the effectiveness is as follows : Citrate>Tartrate>Oxalate>Humate 2. At the same time there are two opposite action among humate, phosphate and iron or aluminium. One is the formation of stable complexes between humate and iron or aluminium, another is the adsorption of phosphate by humus. On account of this fact the amount of phosphate combined in basic phosphates is almost constant, eventhough the among of humus would be increased. 3. The ability to form soluble and stable complexes of Non-humus-constituents with iron or aluminium is similarly smaller than that of humate with iron or aluminium, but Mannit released phosphate completely at the basic range of pH7 to 8.5 and Furfural is very likely to humate in the manner described above.
社団法人日本土壌肥料学会の論文
1951-08-15