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Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China
Alternative TitleEffect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China
Li GuiYuan; Fan HaoMing
2014
Source PublicationPEDOSPHERE
ISSN1002-0160
Volume24Issue:2Pages:285-290
AbstractSoil aggregate stability, an important index of the physical characteristics of a soil, can provide a good indication of a soil's erodibility, and deserves special consideration in regions with cold climate. The objective of this study was to study the effect of freeze-thaw on soil water-stable aggregates in the black soil region of Northeast China. Samples of a typical black soil in the region were collected to measure water-stable aggregates after freeze-thaw under different conditions (i.e., initial moisture contents, freezethaw cycles and freezing temperatures) by wet-sieving into eight particle size groups (> 10, 10-6, 6-5, 5-3, 3-2, 2-1, 1-0.5, and 0.5-0.25 mm). Freeze-thaw had the most effect on aggregate stability when the samples had an initial moisture content of 400 g kg(-1). The water-stable aggregates of the four larger particle size groups (> 5, 5-3, 3-2, and 2-1 mm) reached a peak stability value, but those of the two smaller particle size groups (1-0.5 and 0.5-0.25 mm) reached a minimum value when the soil moisture content was 400 g kg(-1). Water-stable aggregates of the four larger particle size groups decreased while those of the two smaller particle size groups increased with the increase of freeze-thaw cycles. As temperatures fell, the water-stable aggregates of the four larger particle size groups decreased while those of the two smaller particle size groups increased.
Other AbstractSoil aggregate stability, an important index of the physical characteristics of a soil, can provide a good indication of a soil's erodibility, and deserves special consideration in regions with cold climate. The objective of this study was to study the effect of freeze-thaw on soil water-stable aggregates in the black soil region of Northeast China. Samples of a typical black soil in the region were collected to measure water-stable aggregates after freeze-thaw under different conditions (i.e., initial moisture contents, freezethaw cycles and freezing temperatures) by wet-sieving into eight particle size groups (> 10, 10-6, 6-5, 5-3, 3-2, 2-1, 1-0.5, and 0.5-0.25 mm). Freeze-thaw had the most effect on aggregate stability when the samples had an initial moisture content of 400 g kg~(-1). The water-stable aggregates of the four larger particle size groups (> 5, 5-3, 3-2, and 2-1 mm) reached a peak stability value, but those of the two smaller particle size groups (1-0.5 and 0.5-0.25 mm) reached a minimum value when the soil moisture content was 400 g kg~(-1). Water-stable aggregates of the four larger particle size groups decreased while those of the two smaller particle size groups increased with the increase of freeze-thaw cycles. As temperatures fell, the water-stable aggregates of the four larger particle size groups decreased while those of the two smaller particle size groups increased.
KeywordTEMPORAL VARIATION ORGANIC-MATTER CLAY SOIL CYCLES DYNAMICS SIZE WET freezing temperature moisture content particle size water-stable aggregates
Indexed ByCSCD
Language英语
Funding Project[National Natural Science Foundation of China]
CSCD IDCSCD:5111199
Citation statistics
Cited Times:16[CSCD]   [CSCD Record]
Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/149429
Collection中国科学院金属研究所
Affiliation中国科学院金属研究所
Recommended Citation
GB/T 7714
Li GuiYuan,Fan HaoMing. Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China[J]. PEDOSPHERE,2014,24(2):285-290.
APA Li GuiYuan,&Fan HaoMing.(2014).Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China.PEDOSPHERE,24(2),285-290.
MLA Li GuiYuan,et al."Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China".PEDOSPHERE 24.2(2014):285-290.
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