吉林省水稻土的磁化率特征及其分类问题

THE MAGNETIC SUSCEPTIBILITY CHARACTERISTICS AND CLASSIFICATION OF PADDY SOILS IN JILIN PROVINCE

本文研究了吉林省几种水稻土的磁化率变化规律及其在土壤剖面中的分异特点,并据此论证了吉林省水稻土的发育阶段和提出其分类归属。

This paper studies the magnetic susceptibility(M.S) characteristics of some paddy soils in Jilin Province.The results showed that the M.S.(K) of paddy soils was much lower than that of the corresponding upland soils, and K values of old paddy soils was lower than those of young ones.The higher the K value of upland soils was, the more remarkaple the value decreased after the rice had been transplanted.The variabilities were identical with those of old paddy soils of Tai-lake region in SouthChina, but the differentiations of M.S.were unremarkable in soil profiles.Therefore it is considered that the development of paddy soils in Jilin Province is still in initial stage,the classification position belongs to submorphic paddy soil, and that the soil magnetic profiles may be used in soil classification.