干旱区生态环境知识资源中心(Arid): Soil physical and chemical properties affected by long-term grazing on the desert steppe of Inner Mongolia, China

Arid

DOI	10.1016/j.catena.2021.105996
	Soil physical and chemical properties affected by long-term grazing on the desert steppe of Inner Mongolia, China
	Dai, Yujie; Guo, Jianying; Li, Yongqiang; Dong, Zhi; Li, Hongli
通讯作者	Dong, Z ; Li, HL
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2022
卷号	211
英文摘要	It remains unclear how long-term and different intensities of grazing affect the soil infiltration process, total nitrogen (TN), organic carbon (SOC), and grain size of desert steppes of Inner Mongolia, China. We quantified the effects of consecutive years of grazing from 2004 to 2018 on the soil particle size distribution (PSD, using the American soil classification system), mean soil infiltration rate (r), and cumulative infiltration volume (VC), in addition to the contents of SOC and TN, and their ratio (C/N). We defined grazing intensity at four levels, as non-grazed enclosure (NG, 0-), light (LG, 0.15-), moderate (MG, 0.30-), and heavy grazing (HG, 0.45 sheep per month per hectare steppe). The annual grazing period lasted from May to November. We established twelve adjacent experimental plots containing three replications for each grazing intensity. In July 2018, we collected 600 soil samples (0-40 cm soil depth: 4 depths with a 10-cm interval) in the plots (50 per plot) in a sigmoid configu-ration, to determine the PSD, SOC, TN, and C/N. Grazing evidently changed the PSD in diameter ranges of 20-150 (fine particles) and 200-500 mu m (coarse particles). Grazing significantly decreased the uniformity and distribution range of PSD but increased its dispersion, and these changes were most pronounced in the topsoil (0-10 cm depth). LG promoted r and VC, whose augmentation was evident within the initial 10 min of the infiltration process. The Kostiakov infiltration model was better at dynamically and quantitatively fitting the changing process of r than either the Horton or Philip model. Compared with NG, LG and MG significantly increased both SOC and TN (p < 0.01) whereas these were significantly decreased under HG (p < 0.01). Across differing grazing intensities, topsoil SOC contents can be well predicted by the range and heterogeneity of PSD, as well as the fraction of fine soil particles. These results are helpful for better understanding how continuous grazing impacts soil characteristics and for specifically enacting reasonable grazing scenarios to mitigate desertification on vulnerable desert steppes.
英文关键词	Arid region Grazing intensity Multi-fractal theory Soil grain Soil nutrient
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000790443900004
WOS关键词	PARTICLE-SIZE DISTRIBUTION ; INFILTRATION CHARACTERISTICS ; ALPINE MEADOW ; VEGETATION ; GRASSLAND ; INTENSITIES ; NUTRIENTS ; EXCLUSION ; PLATEAU ; TEXTURE
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/392076
推荐引用方式 GB/T 7714	Dai, Yujie,Guo, Jianying,Li, Yongqiang,et al. Soil physical and chemical properties affected by long-term grazing on the desert steppe of Inner Mongolia, China[J],2022,211.
APA	Dai, Yujie,Guo, Jianying,Li, Yongqiang,Dong, Zhi,&Li, Hongli.(2022).Soil physical and chemical properties affected by long-term grazing on the desert steppe of Inner Mongolia, China.CATENA,211.
MLA	Dai, Yujie,et al."Soil physical and chemical properties affected by long-term grazing on the desert steppe of Inner Mongolia, China".CATENA 211(2022).