Soil taxonomy of typical soils in middle-mountain area of northeastern Chongqing

doi:10.3969/j.issn.1004-1524.2018.10.17

›› 2018, Vol. 30 ›› Issue (10): 1729-1738.DOI: 10.3969/j.issn.1004-1524.2018.10.17

• Environmental Science • Previous Articles Next Articles

Soil taxonomy of typical soils in middle-mountain area of northeastern Chongqing

LIAN Maoshan¹, CI En^{1, 2, *}, TANG Jiang¹, HU Jin¹, WEI Chaofu^{1, 2}

1. College of Resources and Environment, Southwest University, Chongqing 400715, China;
2. Key Laboratory of Arable Land Conservation (Southwest China), Ministry of Agriculture and Rural Affairs, Chongqing 400715, China

Received:2017-12-04 Online:2018-10-25 Published:2018-11-02

Abstract

Abstract: The middle-mountain area of northeastern Chongqing was selected as the study area, and 8 typical soil profiles were collected in the area. The morphological characters, physical and chemical properties of the profiles were obtained by observing soil profile in the field, sampling and analyzing soil sample in each horizon for all the test soil profiles. The attribution of the typical soils in higher taxa of Chinese Soil Taxonomy (CST) was discussed, and the references with Genetic Soil Classification of China (GSCC) were established. The results showed that forest and pasture soils had Ochric epipedon in the 8 soil profiles. When the slope was small and the soil erosion was weak, the Argic horizon could be formed in most of the test soils. The soils developed by carbonate weathering material accorded with the lithologic characters of carbonate rocks. The soils above 800 m were in accord with Perudic moisture regime. Eight typical soil profiles were sorted into three orders (Argosols, Cambosols, Primosols), three suborders (Perudic Argosols, Perudic Cambosols, Orthic Primosols), three groups (Calci-Perudic Argosols, Calci-Perudic Cambosols, Udi-Orthic Primosols), and five subgroups (Humic Calci-Perudic Argosols, Typic Calci-Perudic Argosols, Humic Calci-Perudic Cambosols, Typic Calci-Perudic Cambosols, Lithic Udi-Orthic Primosols). The number of Argosols profiles was the highest (four profiles), indicating that soil leaching was obvious in this area. The yellow brown earth, brown earth, terra gialla soil and black limestone soil subgroups in GSCC were all sorted into Calci-Perudic Argosols in CST. The yellow brown earthened soil and mountain shrubby-meadow soil subgroups in GSCC were sorted into Calci-Perudic Cambosols in CST, and the brown earthened soil subgroups in GSCC was sorted into Udi-Orthic Primosols in CST. According to the criteria of soil family and soil series in CST, eight test soil profiles were sorted into 8 soil families and 8 soil series.

Key words: Chongqing Municipality, middle-mountain area, soil taxonomy, diagnostic horizons, diagnostic characteristics

CLC Number:

S155.3

LIAN Maoshan, CI En, TANG Jiang, HU Jin, WEI Chaofu. Soil taxonomy of typical soils in middle-mountain area of northeastern Chongqing[J]. , 2018, 30(10): 1729-1738.

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Soil taxonomy of typical soils in middle-mountain area of northeastern Chongqing

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