首页 > 过刊浏览>2021年第58卷第6期 >1448-1459. DOI:10.11766/trxb202003020084
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四川盆地沙溪庙组地层（J2s）岩石发育土壤的系统分类研究
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中图分类号:

S155.3

基金项目:

国家自然科学基金项目（41671218）和国家科技基础性工作专项项目（2014FY110200A12）资助


Taxonomy of Soils Developed from Rocks of Shaximiao Formation (J2s) Strata in Sichuan Basin
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Fund Project:

National Natural Science Foundation of China（No. 41671218）and Basic Work of the Ministry of Science and Technology of China（No. 2014FY110200A12）

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    摘要:

    地理发生分类的紫色土在中国土壤系统分类中的归属一直受到高度关注，以四川盆地分布最为广泛的侏罗系沙溪庙组地层岩石发育的土壤为研究对象，在对19个典型剖面的成土条件、剖面形态特征和土壤理化性质分析的基础上，根据《中国土壤系统分类检索（第三版）》，确定了供试土壤的诊断层和诊断特性及其在中国土壤系统分类中的高级类别。结果表明，供试土壤归属于3个土纲、3个亚纲、7个土类和12个亚类；色卡确定的颜色上满足“紫色砂、页岩岩性特征”的剖面仅7个；但若在原颜色定义上增加“或色调为2.5YR～5YR，干态明度为4～6，干态彩度为3～4”条件，则有11个剖面的色卡定色符合“紫色砂、页岩岩性特征”，3个剖面的仪器定色符合该特征。

    Abstract:

    The Sichuan Basin is an area the most representative of purplish sandstones and shales distribution in China, with the Shaximiao formation (J2s) being the most widely distributed strata.[Objective] The purpose of this article is to improve soil taxonomy in Sichuan Province, and to discuss rationality of the requirement for hue in classification of "L.C. of Purplish Sandstones and Shales" in line with the Chinese Soil Taxonomy.[Method] A total of 19 soil profiles typical of the Shaximiao formation in Sichuan were selected for analysis of soil-forming environment, morphological features and physico-chemical properties. In line with the criteria set in the Keys to the Chinese Soil Taxonomy (3rd edition), diagnostic horizons and characteristics of the soil profiles were determined and attributions of the profiles specified in the Chinese Soil Taxonomy.[Result] The 19 soil profiles could be sorted into 3 orders, 3 suborders, 7 groups and 12 subgroups, and only 7 of them were found in conformity with the requirement for hue of "L.C. of Purplish Sandstones and Shales", accounting for only 43.75% of the purplish soil, which indicates that most of the purplish soil individuals did not meet this hue requirement.[Conclusion] The purplish soils matched 10 subgroups in the soil taxonomy. Compared with the system of soil genesis classification, the soil taxonomy pays more attention to properties of the purplish soil per se in classification. Taking into account the color characteristics of the purplish soil in this study, it is suggested that the hue range of "2.5YR~5YR, dry value of 4~6 and dry chroma of 3~4" be augmented in addition to the original hue requirements of "L.C. of Purplish Sandstones and Shales", then the purplish soil individuals that match this diagnostic feature in visual colorimetry may reach 64.71% in proportion and increase from 0 to 3 in number in the instrumental colorimetry. Since visual colorimetry is more likely to have errors than instrumental colorimetry it is suggested that the Chinese Soil Taxonomy should stipulate the use of a modern, more objective and more accurate color measuring instrument, and on such a basis the color ranges of some diagnostic features need to be redrafted.

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余星兴,袁大刚,陈剑科,付宏阳.四川盆地沙溪庙组地层（J2s）岩石发育土壤的系统分类研究[J].土壤学报,2021,58(6):1448-1459. DOI:10.11766/trxb202003020084 YU Xingxing, YUAN Dagang, CHEN Jianke, FU Hongyang. Taxonomy of Soils Developed from Rocks of Shaximiao Formation (J2s) Strata in Sichuan Basin[J]. Acta Pedologica Sinica,2021,58(6):1448-1459.

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  • 收稿日期:2020-03-02
  • 最后修改日期:2020-10-06
  • 录用日期:2020-12-28
  • 在线发布日期: 2021-01-06
  • 出版日期: 2021-11-11
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