| Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China |
| 其他题名 | Effect of Freeze-Thaw on Water Stability of Aggregates in a Black Soil of Northeast China
|
| Li GuiYuan; Fan HaoMing
|
| 2014
|
| 发表期刊 | PEDOSPHERE
 |
| ISSN | 1002-0160
|
| 卷号 | 24期号:2页码:285-290 |
| 摘要 | 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. |
| 其他摘要 | 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. |
| 关键词 | TEMPORAL VARIATION
ORGANIC-MATTER
CLAY SOIL
CYCLES
DYNAMICS
SIZE
WET
freezing temperature
moisture content
particle size
water-stable aggregates
|
| 收录类别 | CSCD
|
| 语种 | 英语
|
| 资助项目 | [National Natural Science Foundation of China]
|
| CSCD记录号 | CSCD:5111199
|
| 引用统计 |
|
| 文献类型 | 期刊论文
|
| 条目标识符 | http://ir.imr.ac.cn/handle/321006/149429
|
| 专题 | 中国科学院金属研究所
|
| 作者单位 | 中国科学院金属研究所
|
推荐引用方式
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.
|
修改评论