Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China

doi:10.1007/s11629-017-4638-y

CORC > 成都山地灾害与环境研究所 > 中国科学院水利部成都山地灾害与环境研究所 > Journal of Mountain Science > Journal of Mountain Science-2018 > Vol15 No.3

	Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China
	MENG Chen; NIU Jian-zhi; YIN Zheng-cong; LUO Zi-teng; LIN Xing-na; JIA Jing-wei
刊名	Journal of Mountain Science
	2018-03
卷号	15 期号:3 页码:519-531
关键词	Rock fragment Macropore Forest stone soil Mountain area Industrial Computed Tomography
ISSN号	1672-6316
DOI	10.1007/s11629-017-4638-y
通讯作者	NIU Jian-zhi
英文摘要	Rock fragments have major effect on soil macropores and water movement. However, the characteristics of rock fragments and their relationship with macropore characteristics remain elusive in forest stony soils in northern mountainous area of China. The objectives of this study are to (1) use Industrial Computed Tomography (CT) scanning to quantitatively analyze rock fragment characteristics in intact soil columns in different forest lands and (2) identify the relationship between characteristics of rock fragments and that of the macropores. Intact soil columns that were 100 mm in diameter and 300 mm long were randomly taken from six local forest stony soils in Wuzuolou Forest Station in Miyun, Beijing. Industrial CT was used to scan all soil column samples, and then the scanned images were utilized to obtain the three-dimensional (3D) images of rock fragments and macropore structures. Next, the parameters of the rock fragments and macropore structure were measured, including the volume, diameter, surface area, and number of rock fragments, as well as the volume, diameter, surface area, length, angle, tortuosity and number of macropores. The results showed that no significant difference was found in soil rock fragments content in the 10-30 cm layer between mixed forest and pure forest, but in the 0-10 cm soil layer, the rock fragments in mixed forest were significantly less than in pure forest. The number density of macropores has significant negative correlation with the number of rock fragments in the 0-10 cm soil layer, whereas this correlation is not significant in 10-20 cm and 20-30 cm soil layers. The volume density of macropore was not correlated with the volume density of rock fragments, and there is no correlation between the density of macropore surface area and the density of rock fragment surface area. Industrial CT scanning combined with image processing technology can provide a better way to explore 3D distribution of rock fragments in soil. The content of rock fragments in soil is mainly determined by parent rocks. The surface soil (0-10 cm) of forest contains fewer rock fragments and more macropores, which may be caused by bioturbation, root systems, gravitational settling and faunal undermining.
电子版国际标准刊号	1672-6316
语种	英语
内容类型	期刊论文
源URL	[http://ir.imde.ac.cn/handle/131551/23169]
专题	Journal of Mountain Science _Journal of Mountain Science-2018_Vol15 No.3
作者单位	1 College of Soil and Water Conservation, Beijing Forestry University, Beijing, 100083, China; 2 Beijing Collaborative Innovation Center for Eco-environmental Improvement with Forestry and Fruit Trees, Beijing University of Agriculture, Beijing 102206, China; 3 Department of Geography, Texas A&M University, College Station, Texas, 77843, United States
推荐引用方式 GB/T 7714	MENG Chen,NIU Jian-zhi,YIN Zheng-cong,et al. Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China[J]. Journal of Mountain Science,2018,15(3):519-531.
APA	MENG Chen,NIU Jian-zhi,YIN Zheng-cong,LUO Zi-teng,LIN Xing-na,&JIA Jing-wei.(2018).Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China.Journal of Mountain Science,15(3),519-531.
MLA	MENG Chen,et al."Characteristics of rock fragments in different forest stony soil and its relationship with macropore characteristics in mountain area, northern China".Journal of Mountain Science 15.3(2018):519-531.