| Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China | |
| Alternative Title | Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China |
| Li GuiYuan; Fan HaoMing | |
| 2014 | |
| Source Publication | PEDOSPHERE
 |
| ISSN | 1002-0160 |
| Volume | 24Issue:2Pages:285-290 |
| Abstract | Soil 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 Abstract | Soil 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. |
| Keyword | TEMPORAL VARIATION ORGANIC-MATTER CLAY SOIL CYCLES DYNAMICS SIZE WET freezing temperature moisture content particle size water-stable aggregates |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Natural Science Foundation of China] |
| CSCD ID | CSCD:5111199 |
| Citation statistics |
Cited Times:21[CSCD]
[CSCD Record]
|
| Document Type | 期刊论文 |
| Identifier | http://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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