干旱区生态环境知识资源中心(Arid): Contribution of fine roots mechanical property of Poaceae grasses to soil erosion resistance on the Loess Plateau

Arid

DOI	10.1016/j.geoderma.2022.116122
	Contribution of fine roots mechanical property of Poaceae grasses to soil erosion resistance on the Loess Plateau
	Liu, Yi-Fan; Meng, Ling-Chao; Huang, Ze; Shi, Zhi-Hua; Wu, Gao-Lin
通讯作者	Wu, GL
来源期刊	GEODERMA
ISSN	0016-7061
EISSN	1872-6259
出版年	2022
卷号	426
英文摘要	Plant roots play a key role in soil erosion process, but less studies are focused on analyze the soil erosion resistance in terms of grassland roots mechanical properties. The objective of this study was to examine the root diameter, root density, root tensile strength and soil shear strength for five typical and widely distributed Poaceae grasses in semi-arid regions, thus determine the contribution of roots of artificial grassland to soil erosion resistance. Results showed that the roots of five grasslands were densely distributed in the surface soils (0-10 cm). Bromus inermis had the strongest roots that characterized by the highest average tensile strength (40.2 MPa) The shear strength significantly increased as the vertical stress increased from 50 kPa to 300 kPa, but the degree varied with grassland types. Shear strength was also linearly correlated with root density when vertical pressure reached 300 kPa (p < 0.01, R-2 = 0.47), indicating that high root density might help resist extreme external stress. Moreover, Bromus inermis showed a high soil cohesion of 122.7 kPa (next to the highest value of 128.71 kPa in Panicum virgatum). Overall, Bromus inermis showed the highest soil erosion resistance among these five grasslands, could be a good candidate in Poaceae artificial grasslands to improve soil shear strength for topsoil conservation. These findings have potential implications for understanding the contribution of Poaceae grasses' roots on the topsoil reinforcement, and provide a theoretical basis for artificial grassland establishment on soil erosion resistance on the Loess Plateau.
英文关键词	Poaceae artificial grassland Root diameter Root tensile strength Soil shear strength Soil erosion resistance
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000860374900001
WOS关键词	CONCENTRATED FLOW ; TENSILE-STRENGTH ; SHEAR-STRENGTH ; PLANT-ROOTS ; VEGETATION ; WATER ; MODELS
WOS类目	Soil Science
WOS研究方向	Agriculture
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392920
推荐引用方式 GB/T 7714	Liu, Yi-Fan,Meng, Ling-Chao,Huang, Ze,et al. Contribution of fine roots mechanical property of Poaceae grasses to soil erosion resistance on the Loess Plateau[J],2022,426.
APA	Liu, Yi-Fan,Meng, Ling-Chao,Huang, Ze,Shi, Zhi-Hua,&Wu, Gao-Lin.(2022).Contribution of fine roots mechanical property of Poaceae grasses to soil erosion resistance on the Loess Plateau.GEODERMA,426.
MLA	Liu, Yi-Fan,et al."Contribution of fine roots mechanical property of Poaceae grasses to soil erosion resistance on the Loess Plateau".GEODERMA 426(2022).