干旱区生态环境知识资源中心(Arid): 黄河中下游河岸缓冲带土壤粒径分形特征

Arid

	黄河中下游河岸缓冲带土壤粒径分形特征
其他题名	Fractal dimension characteristic of soil particle size in the riparian buffer zone of the middle and lower reaches of the Yellow River
	赵清贺; 卢训令; 汤茜; 张祎帆; 刘璞
来源期刊	中国水土保持科学
ISSN	1672-3007
出版年	2016
卷号	14 期号:5 页码:37-46
中文摘要	在人类活动与自然因素的共同作用下,黄河中下游河岸缓冲带土壤结构和植被等受到不同程度的破坏。本研究选择黄河中下游郑州-开封段河岸缓冲带作为研究区,探讨河岸人工林表层0~20 cm土壤颗粒组成和分形维数在不同植被类型和河岸缓冲距离的分布特征及其与群落特征的关系。结果表明: 1)研究区土壤颗粒质量分数呈非均匀分布,土壤质地空间分布表现为同质性,不同植被类型和河岸缓冲距离对土壤颗粒组成与土壤颗粒分形维数D值的影响差异不显著,D为2.75左右,土壤结构良好; 2)D值与黏粒质量分数均与土壤全碳(TC)、总有机碳(TOC)和全氮(TN)的质量分数显著正相关(P<0.01),砂粒质量分数则与TC、TOC和TN质量分数呈显著的负相关(P<0.01),粉粒质量分数只与TN质量分数在0.05水平显著正相关; 3)草本高度、乔木胸径、高度和郁闭度与D值、粉粒和黏粒质量分数呈正相关,与砂粒质量分数呈负相关。说明河岸人工林覆盖和生物量越大,土壤结构越好。
英文摘要	[Background] Riparian soil and vegetation along rivers are important for biodiversity maintenance and biogeochemistry circulation of river ecosystems, and are the basis of many ecosystem services. Influenced by human activities and natural factors, soil structure and vegetation in the riparian buffer zone of the middle and lower reaches of the Yellow River are subjected to degradation to a certain extent. [Methods] Selecting the Zhengzhou-Kaifeng section of the middle and lower reaches of the Yellow River as the studied area, as well as using methods of field investigation, experimental analysis, and canonical correspondence analysis (CCA), the present study was conducted to investigate the fractal dimension characteristics of riparian plantation soil particle size at the surface layer of 0-20 cm under different vegetation types and buffer distances. [Results] The results indicated that the soil particle size distribution (PSD) was heterogeneous with higher contents of silt and clay (more than 75.5%) and less content of sand. However, soil texture was uniform in spatial, since no significant difference was observed between Salix matsudana plantation and Populus tomentasa plantation as well as among the four riparian buffer zones (< 1.5 km, sample number (n) = 13; 1.5-3 km, n = 11; 3-4.5 km, n = 11; > 4.5 km, n = 12). The fractal dimension (D) value was approximately equal to 2.75, suggesting a fine soil structure with favorable performance in the retention of water and fertility in the studied area. Result from Pearson correlation analysis indicated that D value and clay content were significantly and positively correlated with soil total carbon (TC), total organic carbon (TOC), and total nitrogen (TN) at the 0.01 level, on the contrary, sand content was significantly and negatively correlated with TC, TOC, and TN at the 0.01 level, while silt content was only significantly and positively correlated with TN at the 0.05 level. Result from CCA indicated that the community characteristics such as the herb height, tree diameter of breast height, tree height, and tree cover were related positively and closely with D value, silt content, and clay content, while were negatively correlated with sand content, suggesting that the larger tree coverage and biomass can lead to the better soil structure. Moreover, inconsistent with other research results, the soil particle size distribution and fractal dimension characteristics were less affected by elevation because of the small gradient variation in the studied area. [Conclusions] The riparian buffer zone of the middle and lower reaches of the Yellow River, which is affected by both human activities and natural factors, is subjected to serious issues of soils such as loose structure, decreased organic matter content, and significant desertification, thus results from this study can provide basis for ecological restoration, bank erosion control, and land management of the degraded riparian zone.
中文关键词	土壤粒径 ; 分形特征 ; 群落特征 ; 河岸缓冲带 ; 黄河中下游滩地
英文关键词	soil particle size fractal dimension community characteristics riparian buffer zone floodplain of the middle and lower reaches of the Yellow River
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:5839355
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/235506
作者单位	河南大学环境与规划学院, 教育部黄河中下游数字地理技术重点实验室, 开封, 河南 475004, 中国
推荐引用方式 GB/T 7714	赵清贺,卢训令,汤茜,等. 黄河中下游河岸缓冲带土壤粒径分形特征[J],2016,14(5):37-46.
APA	赵清贺,卢训令,汤茜,张祎帆,&刘璞.(2016).黄河中下游河岸缓冲带土壤粒径分形特征.中国水土保持科学,14(5),37-46.
MLA	赵清贺,et al."黄河中下游河岸缓冲带土壤粒径分形特征".中国水土保持科学 14.5(2016):37-46.