|
|||||
|
|
| 黄土丘陵区冻融对土壤抗冲性及相关物理性质的影响 | |
| 引用本文： | 李 强,刘国彬,许明祥,孙 会,张 正,高丽倩.黄土丘陵区冻融对土壤抗冲性及相关物理性质的影响[J].农业工程学报,2013,29(17):105-112. |
| 作者姓名： | 李 强 刘国彬 许明祥 孙 会 张 正 高丽倩 |
| 作者单位： | 1. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室,杨凌,712100 2. 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室，杨凌 712100; 西北农林科技大学水土保持研究所，杨凌 712100 3. 中国科学院安塞水土保持综合试验站,安塞,717400 4. 西北农林科技大学水土保持研究所,杨凌,712100 |
| 基金项目： | 中国科学院战略性先导科技专项（XDA05060300）。 |
| 摘 要： | 在股状水流侵蚀比较发育的黄土丘陵区,土壤可蚀性主要依赖于土壤抗冲能力。为了揭示季节性冻融对土壤抗冲性的影响,该文借助模拟冲刷试验,设置了裸地对照(CK)、黑麦草传统密度(LD)和加倍密度(HD)3种处理,测定并分析了冻融前后土壤物理性质及其抗冲性。结果表明,与冻融前相比,表层土壤容重、团聚体含量和根系密度在3个处理中均未发生显著变化(P<0.05),土壤黏聚力略有下降,而崩解速率在处理CK、LD和HD中分别增加了20.6%、18.8%和7.3%。冻融作用延后了3个处理的主要产沙时间,降低了土壤抗冲能力,增加了冲刷中途泥沙流失速率。与未冻融相比,冻融作用增加了处理CK和LD泥沙流失量为19.41%和6.70%,但对处理HD影响较小(P<0.05)。冻融和根系共同作用在LD和HD处理上分别减少土壤流失量为3.72%和49.39%。该研究期望对完善土壤侵蚀机理提供一定的参考价值。 |
| 关 键 词： | 土壤 侵蚀 物理性质 冻融作用 土壤抗冲性 根系 黄土丘陵区 |
| 收稿时间： | 5/6/2013 12:00:00 AM |
| 修稿时间： | 2013/7/15 0:00:00 |
Effect of seasonal freeze-thaw on soil anti-scouribility and its related physical property in hilly Loess Plateau |
|
| Li Qiang,Liu Guobin,Xu Mingxiang,Sun Hui,Zhang Zheng and Gao Liqian.Effect of seasonal freeze-thaw on soil anti-scouribility and its related physical property in hilly Loess Plateau[J].Transactions of the Chinese Society of Agricultural Engineering,2013,29(17):105-112. | |
| Authors: | Li Qiang Liu Guobin Xu Mingxiang Sun Hui Zhang Zheng and Gao Liqian |
| Institution: | 1. State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China;1. State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China;1. State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China;3. Ansai Field Experiment Station of the Chinese Academy of Sciences, Ansai 717400, China;2. Institute of Soil and Water Conservation, Northwest A & F University, Yangling 712100, China;1. State Key Laboratory of Soil Erosion and Dry Land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Chinese Academy of Sciences and Ministry of Water Resources, Yangling 712100, China |
| Abstract: | Seasonal freeze-thaw plays a significant role in soil properties as well as the management of soil and water resources in northern latitudes. Soil erodibility primarily relies on soil anti-scouribility (AS) in the concentrated flow erosion zones of the Loess Plateau. An understanding of the characteristics of freeze-thaw soil is essential for erosion essence in the seasonal freeze-thaw area. The primary goal of this study was to evaluate the differences in soil AS and its related freeze-thaw-induced soil physical properties, as well as root density before and after a cycle of freeze-thaw. |
| Keywords: | soils erosion physical properties seasonal freeze-thaw root soil anti-scouribility hilly Loess Plateau |
| 本文献已被 CNKI 万方数据 等数据库收录！ | |
| 点击此处可从《农业工程学报》浏览原始摘要信息 | |
| 点击此处可从《农业工程学报》下载免费的PDF全文 | |