Geochemical barriers and element retention in soils in different landscapes of the Tianshan Mountain area, Xinjiang, China

Huang, Biao; Zi-tong, Gong

doi:10.1016/j.geoderma.2004.10.008

Cited by 7 publications

(3 citation statements)

References 15 publications

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“…The accumulation of OM distinctly increased the contents of DTPA-Fe, and Zn and CH 3 COONH 4 -Mn in the soils (Table 4). The relationship had also been found by Huang and Gong (2005) in alto-cryic landscape in Tianshan Mountains of Xinjiang, China. Unlike bioavailable elements (Tables 2 and 4), the total content of elements in the soils did not show a significant correlation with soil OM (p > 0.05).…”

Section: Factors Affecting Elements and Their Availabilitysupporting

confidence: 52%

“…A low clay (particle diameter <0.002 mm) content with only 45-234 g kg -1 was found in most of soil subgroups, whereas only the Gelic-alluvic Primosols had high clay content ( Table 2). Accumulation of clay may increase the concentrations of some major and trace elements such as Ti, Mn, Cu, Zn, Ni, Co and V (Huang and Gong, 2005). However, it seemed that the clay accumulation here was not obviously occurred (Table 2) so that high contents of these elements were not found in most soils except for the Gelic-Alluvic Primosols with (Table 4).…”

Section: Immaturity Of the Soilsmentioning

confidence: 92%

“…This can also be verified by higher Ca and Sr in SodiCryic Aridosols with high carbonate content than in other soils (Tables 2 and 4). Meanwhile, most of immobile trace elements such as Fe, Al, Ti, Mn, Co, Cr, and Ba had lower contents in the soils than in Chinese soils (Table 3) due to the dilution of cumulative carbonate (Huang and Gong, 2005). Obviously, it was this accumulation of carbonate in processes of pedogenesis that was the main factor affecting soil element geochemistry in this region.…”

Section: Factors Affecting Elements and Their Availabilitymentioning

confidence: 93%

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Elemental geochemistry of alto-cryic soils of Qinghai-Tibet Plateau in China-An example from the unpopulated Kekexili region

2006

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The Qinghai-Tibet Plateau has developed immature soils since the late Pliocene period when it was uplifted. The objectives of this paper were (i) to investigate native major and trace elements of the immature soils in the Kekexili region in the Plateau; (ii) to evaluate the bioavailability of selected trace elements in the soils; (iii) to better understand the factors affecting accumulation and depletion of the elements and their bioavailability over a long history of alto-cryic pedogenesis. Cambosols and Aridosols are dominant soil types in this region while Gleyosols and Primosols are minor types. These coarse-textured soils have high soil pH and free carbonate content. The soil profile often developed a mattic or humic epipedon with high organic matter content in the topsoil. The contents of Ca, Mg, Na, and Sr in the Kekexili soils were significantly higher than the average values of Chinese soils, and also the world average, while the contents of Fe, Al, Ti, Mn, P, Co, Cr, and Ba in the former soils lower than those in the latter soils. The accumulation or depletion of elements was mainly dependent on soil carbonate content. The bioavailability of Fe, Zn, and Mn was positively related to the levels of organic matter in the surface soil. Results indicate that though these soils had a long history of pedogenesis, they were still relatively immature due to weak geochemical cycles but the bioavailability of nutrients in topsoil was high.