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本文立足于分析水稻土中铁的氧化物及其水合物的晶质态和无定形态比,来研究水稻土不同层段间铁的氧化物活化与老化状况。由于氧化物晶胶率变异甚大,笔者进一步提出用铁的氧化物晶胶率层段系数(kh)=层段(诸层次)晶胶率/耕层(表土层)晶胶率,然后算出各层的kh值,绘成剖面图式,即可清楚地看出相同的发育程度的水稻土有着相似的图式。以江苏省三种不同起源母土上发育的不同水型水稻土12个剖面进行计算并成图,归纳出六种剖面图式。
Based on the analysis of the crystalline and amorphous morphologies of iron oxides and hydrates in paddy soils, this paper studies the activation and aging of iron oxides in different layers of paddy soils. Due to the large variation of the oxide gel rate, the author further suggests that the coefficient of the crystalline oxide of the oxide layer of iron (kh) = the ratio of the crystalline gel of the layers (topsoil) / the gel fraction of the topsoil (topsoil) The kh values of the layers are plotted as profiles, and it is clear that paddy soils with the same degree of development have similar patterns. In this paper, 12 sections of different paddy soil developed on three types of mother soil of different origins in Jiangsu Province were calculated and plotted, and six section patterns were summarized.