| 不同土地利用方式对土壤团聚体稳定性及其 导水率的影响 |
| 袁晓良1,4; 李俊雅1,4; 葛乐3; 李潜3; 刘毅1,2
|
| 2020
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发表期刊 | 水土保持研究
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卷号 | 27期号:4页码:67-77 |
摘要 | 为分析南水北调(中线)丹江口库区不同土地利用方式下土壤团聚体稳定性及其导水率,揭示人为活动对土
壤结构和水力特性的作用与影响,以库区内 3 种不同土地利用方式(旱地、水田、林地)土壤为研究对象,经干筛测定团
聚体的组成状况,探究了不同土地利用方式下土壤团聚体、土壤有机碳和土壤饱和导水率的相互关系。结果表明:不
同土地利用方式下土壤团聚体机械稳定性表现为旱地最高,林地次之,水田最低;有机碳含量则表现为林地 > 水田 >
旱地。不同土地利用方式下各粒径团聚体中的有机碳含量分布也各不相同,旱地土壤有机碳在粒径 <0. 25mm 的团
聚体中含量最高,水田土壤有机碳分布较为均匀,林地土壤有机碳主要集中在粒径 <1mm 的团聚体中。饱和导水率
表现为林地 > 旱地 > 水田。相关性分析表明饱和导水率与有机碳含量呈显著正相关关系,但与团聚体机械稳定性没
有明显关系。同时土壤 MWD 值和 GMD 值与有机碳含量都呈现出显著的负相关关系,表明土壤有机碳在土壤团聚
体机械稳定性和土壤导水率方面都起着重要的作用。 |
其他摘要 | In order to analyze the aggregate stabilities and water conductivities of soils under different land use
patterns in the Danjiangkou reservoir area of the South - to - North Water Diversion Project ( middle route ),
and to reveal the effects of human activities on soil structure and hydraulic characteristics , three land use
patterns including
dry
land , paddy fields and woodland in this area were studied.The composition of soil
aggregates was determined by
dry sieving
to explore the relationships between soil aggregates , soil organic
carbon and soil saturated water conductivity under different land use patterns.The results show that the
mechanical stability of soil aggregates is the highest in dry
land , followed by forest land , and the lowest in
paddy field ; the organic carbon content is the highest in the woodland
, followed by the paddy field and the
least in the dry land ; the distributions of organic carbon in different particle size aggregates under different
land use patterns are also different ; the organic carbon content in aggregate with particle size<0. 25mm in
dryland is the highest , and the distribution of soil organic carbon in paddy fields is relatively uniform ; the
organic carbon content mainly concentrates in agglomerates with a particle size of<1mm in forestland
; thesaturated hydraulic conductivity decreases in the order : forest land>dry
land>paddy field.Correlation anal
-
ysis shows that there is significant positive correlation between saturated hydraulic conductivity and organic
carbon content , but is not correlation between saturated hydraulic conductivities and the mechanical stabili -
ties of aggregates.At the same time , soil MWD value and GMD value have the significant negative correla -
tion with organic carbon content , indicating that soil organic carbon plays an important role in mechanical
stability of aggregate and hydraulic conductivity
of soil. |
关键词 | 丹江口库区
土壤团聚体
土壤有机碳
饱和导水率
|
收录类别 | 中文核心期刊要目总览
|
语种 | 中文
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文献类型 | 期刊论文
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条目标识符 | sbir.nwafu.edu.cn/handle/361005/9903
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专题 | 水保所知识产出(1956---)
|
作者单位 | 1.中国科学院 武汉植物园/水生植物与流域生态重点实验室 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 3.大自然保护协会 4.中国科学院大学
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推荐引用方式 GB/T 7714 |
袁晓良,李俊雅,葛乐,等. 不同土地利用方式对土壤团聚体稳定性及其 导水率的影响[J]. 水土保持研究,2020,27(4):67-77.
|
APA |
袁晓良,李俊雅,葛乐,李潜,&刘毅.(2020).不同土地利用方式对土壤团聚体稳定性及其 导水率的影响.水土保持研究,27(4),67-77.
|
MLA |
袁晓良,et al."不同土地利用方式对土壤团聚体稳定性及其 导水率的影响".水土保持研究 27.4(2020):67-77.
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文件名:
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不同土地利用方式对土壤团聚体稳定性及其导水率的影响_袁晓良.pdf
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