黒土の腐植に関する研究(第1報) : 有機無機膠質複合体に就て

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In this paper, the organo-mineral gels of black soil was studied by the Tyulin method. The results may be summarized as follows : (1) Black soil contained about 1% of G_1 and nearly 15% of G_2 content varied according to samples. In this point black soil was different from podzol, and it is difficult clearly the relationship between G_1 content and soil fertility. (2) In base exchange capacity G_1 was greater than G_2,which shows that black soil is a special kind of soil and that base exchange capacity of these groups have no relations with soil fertility. (3) In carbon-nitrogen ratio G_<2a> is greater than G_1,and black soil has a tendency to be analogous to the European podzol. But it can be assumed that in carbon and nitrogen content black soil was considerably different from both podzol and chernozem. (4) Judging from the inorganic composition of each group, it seems that though iron and aluminum were combined with silicon and its complex was combined with humus, yet at least, in the part of G_2 group a part of iron and aluminum were directly combined with humus. (5) The authers are of opinion that the soil which has large SiO_2/R_2O_3 of G_1 and G_2 can be fertilized with comparative ease. (6) Contrary to the author's expectations a high productive paddy soil was greater than field soil in the carbon-nitrogen ratio of each humate fraction of black soil, owing to the heavy use of farmyard manure and grass which were expected to be imperfectly decomposed and consequently formed a part of soil colloid. (7) The quantity of the 1st humate contained in G_1 and G_2 seems to be a little related to the fertility of soil, but it is doubtful whether it is of so much importance as Dr. Tyulin says.
社団法人日本土壌肥料学会の論文
1953-10-01

黒土の腐植に関する研究(第1報) : 有機無機膠質複合体に就て

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