Dynamic study on water stability of soil structure and soil characteristics of several types of soils in southwest China |
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Authors: | Nan Shen Yurong He Xiangming Xu |
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Affiliation: | (1) College of Resources and Environment, Sichuan Agricultural University, Ya’an, 625014, Sichuan, China;(2) Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, 610041, Sichuan, China |
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Abstract: | Three suborder soils in southwest China were adopted, namely Ustic Vertisol, Stagnic Anthrosol and Ustic Ferrosol, so as to
carry out the basic physical and chemical analysis respectively, to design a dynamic measuring method for water stability
of soil structure and conduct the comparative study on the quality of the soil structure. The results indicated that ➀ The
water stability dynamic characteristic of the soil structure could well reflect the maintaining capability of the soil structure
as time goes on. ➁ The quality of several soil structures in southwest China was sequenced as follows: Stagnic Anthrosols
> Ustic Vertisols > Ustic Ferrosols. ➂ The water stability of soil structure is very positively correlated with the capillary
porosity and the clay particle (D < 0.002 mm) content (C
c), but is very negatively correlated with the silt (D is 0.05–0.002 mm) content (C
sc), and ➃ The dynamic functional equation of the water stability of soil structure in southwest China was established, so that
the water stability characteristics of various soil structures could be quantitatively expressed and the quality of different
soil structures can be quantitatively compared from each other.
Biography: SHEN Nan(1982–), male, Associate researcher, research direction: soil geography and micromorphology. |
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Keywords: | soil structure dynamic water stability soil erosion |
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