Genetic characteristics and taxonomic classification of paddy field soils developed from two parent materials in East Hunan

doi:10.3969/j.issn.1004-1524.2018.07.13

›› 2018, Vol. 30 ›› Issue (7): 1194-1201.DOI: 10.3969/j.issn.1004-1524.2018.07.13

• Environmental Science • Previous Articles Next Articles

Genetic characteristics and taxonomic classification of paddy field soils developed from two parent materials in East Hunan

MAN Haiyan^a, HUANG Yunxiang^{a, b, *}, SHENG Hao^{a, b}, YU Zhan^a, ZHOU Qing^{a, b}, YUAN Hong^{a, b}, ZHANG Yangzhu^{a, b}

a. College of Resources and Environment,Hunan Agricultural University, Changsha 410128, China;
b. Institute of Soil Science,Hunan Agricultural University, Changsha 410128, China

Received:2017-11-21 Online:2018-07-20 Published:2018-08-02

Abstract

Abstract: Six typical paddy field soils, which were developed from either purple rock weathering or river and lake sediments in the East Hunan, were investigated to make its attribution in Chinese Soil Taxonomy clear. The diagnostic horizon and characteristics of 6 paddy field soils were retrieved out and the taxonomic classification were determined according to Chinese Soil Taxonomy (3rd edition) , based on soil forming environment, physical and chemical properties, and genesis characteristics of soil profiles. It was shown that the paddy soil developed from 2 tested parent materials exhibited similarity in soil pH, content of organic matter and total iron. With the deepening of soil profiles, soil pH increased, yet organic matter content decreased. The total iron content of topsoil was lower than that in plow pan and hydragric horizon. Soils developed from purple rock weathering were redder than that developed from river and lake sediments, and the soil particle composition of the former was similar between solum among soil profiles. Fe_o/Fe_d in anthrostagnic epipedon was higher than that in subsoils, while the (Fe_d-Fe_o)/Fe_o was the contrary. The determined diagnostic horizons of all test soils were anthrostagnic epipedon and hydragric horizon, and the diagnostic characteristics were mainly anthrostagnic soil moisture regime, gleyic features and redox features. The 6 paddy field soils belonged to stagnic anthrosol, and could be further divided into 3 groups and 3 subgroups, i.e. gleyi-stagnic anthrosols, Fe-accumuli-stagnic anthrosols, hapli-stagnic anthrosols, and typic gleyi-stagnic anthrosols, typic Fe-accumuli-stagnic anthrosols, typic hapli-stagnic anthrosols. Finally, 5 soil families and 6 soil series of test soils were established.

Key words: paddy field soil, genetic characteristics, diagnostic horizon, diagnostic characteristics

CLC Number:

S155.3

MAN Haiyan, HUANG Yunxiang, SHENG Hao, YU Zhan, ZHOU Qing, YUAN Hong, ZHANG Yangzhu. Genetic characteristics and taxonomic classification of paddy field soils developed from two parent materials in East Hunan[J]. , 2018, 30(7): 1194-1201.

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Genetic characteristics and taxonomic classification of paddy field soils developed from two parent materials in East Hunan

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