DOI: 10.3390/su12041587
论文题名: Structural changes of compacted soil layers in Northeast China due to freezing-thawing processes
作者: Wang L. ; Wang H. ; Tian Z. ; Lu Y. ; Gao W. ; Ren T.
刊名: Sustainability (Switzerland)
ISSN: 20711050
出版年: 2020
卷: 12, 期: 4 语种: 英语
英文关键词: Aggregate size distribution
; Freezing and thawing
; Pore size distribution
; Soil compaction
英文摘要: Soil compaction has become a global concern that reduces soil quality and may jeopardize agricultural sustainability. The objective of this study is to evaluate if the freezing-thawing process can alleviate the negative effects of soil compaction during overwinter time in Northeast China. The field experiment was a split plot design including two surface treatments (bare and mulch) and three compaction levels (low, moderate, and high compactions with initial bulk densities of 1.2, 1.4 and 1.6 g cm-3). Results showed that compared with initial values in the fall, freezing-thawing events increased soil porosity (by 4.28% to 25.68%) and the ratio of large-size pores (by 44.5% to 387.6%) after thawing in the spring. The greatest changes were observed in the high compaction treatment, and mulch-enhanced soil structural transformation. Additionally, the ratio of large-size aggregates (>1 mm) was increased and the fraction of small-size aggregates (<1 mm) was decreased. These changes in soil structural characteristics were attributed mainly to the modification of ice-filled pores space during the overwinter period. We concluded that the freezing-thawing process was an effective natural force for ameliorating soil compaction in Northeast China. © 2020 by the authors. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/159628
Appears in Collections: 气候变化与战略
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作者单位: College of Land Science and Technology, China Agricultural University, Beijing, 100193, China; College of Resources and Environment, Huazhong Agricultural University, Wuhan, 430070, China
Recommended Citation:
Wang L.,Wang H.,Tian Z.,et al. Structural changes of compacted soil layers in Northeast China due to freezing-thawing processes[J]. Sustainability (Switzerland),2020-01-01,12(4)