| 黄土丘陵区土壤有机碳含量对侵蚀坡面表层 土壤含水量时空变化的影响 |
| 夏彬1,2; 朱世硕3; 郝旺林1,2; 许明祥1,3
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| 2020
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发表期刊 | 水土保持学报
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卷号 | 34期号:3页码:175-181 |
摘要 | 表层土壤含水量能敏感反映降雨、气温、侵蚀等环境要素的变化,明确表层土壤含水量时空变化特征
可为农业生产及土壤环境效应评价等提供参考。以黄土丘陵区不同有机碳水平的侵蚀坡面为对象,连续监测了
2016 年 11 月至 2018 年 3 月 0-5cm 土壤含水量的动态变化,结合降水资料,分析了不同土壤有机碳水平下侵蚀
坡面沉积区、侵蚀区及对照区表层土壤含水量的变化特征。结果表明:(
1 )表层土壤含水量不同季节变化差异
显著,夏季变幅最大,单日最大变幅可达14. 3% ,春、秋、冬季的单日最大变幅 <8. 0% 。换言之,夏季是土壤
水分变化的敏感期。( 2 )土壤有机碳水平、坡面部位、土壤温度对表层水分变异的影响程度因季节而异。
( 3 )土壤侵蚀加剧了坡面表层土壤含水量变异,变异程度表现为沉积区 > 侵蚀区 > 对照(未侵蚀)区;侵蚀
前后侵蚀区表层土壤含水量变化量与沉积区变化量的差值随有机碳水平升高从 0. 85% 增加至 9. 81% 。
( 4 )侵蚀坡面表层土壤含水量的时空异质性随有机碳水平升高呈非线性变化趋势。 |
其他摘要 | Surface soil water content can sensitively reflect the changes of rainfall , temperature , erosion and
other environmental factors.It can provide reference for agricultural production and evaluation of soil envi -
ronmental effect to clarify the temporal and spatial variation characteristics of surface soil water content.In
this study , the surface soil water content of 0-5cm soil was continuously
monitored from November 2016to
April 2018on the eroded slopes with different soil organic carbon levels in the loess hilly region.And based
on the precipitation data , the variation characteristics of surface soil water content in the sedimentary area ,
erosion area and control area of erosion slope with different soil organic carbon levels were analyzed.The re -
sults showed that :( 1 ) The variation of surface soil water content was significant among different seasons ,
with the largest variation in summer.The maximum daily variation was 14.
3%in summer , and the maxi -
mum daily variations in spring ,
autumn and winter were all less than 8. 0%.In other words , summer was the
sensitive period of soil water change.
(
2 ) The influence of soil organic carbon level , slope area and soil tem -
perature on the variation of surface soil water content varied with seasons. ( 3 ) Soil erosion intensified the
variation of surface soil water content on the slope , and the variation degree followed the order : sedimentary
area>erosion area>control ( non - erosion ) area.With the increasing of soil organic carbon level , the differ -
ence of variation of surface soil water content before and after erosion in erosion area and that in sedimentary
area increased from 0. 85%to 9. 81%.
(
4 ) The spatial - temporal heterogeneity of the surface soil water contenton eroded slope showed a non - linear trend with the increasing of soil organic carbon level. |
关键词 | 表层土壤含水量
侵蚀坡面
有机碳水平
不同季节
变异性
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收录类别 | 中文核心期刊要目总览
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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/361005/10015
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专题 | 水保所知识产出(1956---)
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作者单位 | 1.中国科学院水利部水土保持研究所 2.西北农林科技大学林学院 3.中国科学院大学
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第一作者单位 | 中国科学院水利部水土保持研究所
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推荐引用方式 GB/T 7714 |
夏彬,朱世硕,郝旺林,等. 黄土丘陵区土壤有机碳含量对侵蚀坡面表层 土壤含水量时空变化的影响[J]. 水土保持学报,2020,34(3):175-181.
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APA |
夏彬,朱世硕,郝旺林,&许明祥.(2020).黄土丘陵区土壤有机碳含量对侵蚀坡面表层 土壤含水量时空变化的影响.水土保持学报,34(3),175-181.
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MLA |
夏彬,et al."黄土丘陵区土壤有机碳含量对侵蚀坡面表层 土壤含水量时空变化的影响".水土保持学报 34.3(2020):175-181.
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文件名:
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黄土丘陵区土壤有机碳含量对侵蚀坡面表层土壤含水量时空变化的影响_夏彬.pdf
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