干旱区生态环境知识资源中心(Arid): Vertical Distributions of Soil Nutrients and Their Stoichiometric Ratios as Affected by Long Term Grazing and Enclosing in a Semi-Arid Grassland of Inner Mongolia

Arid

DOI	10.3390/agriculture10090382
	Vertical Distributions of Soil Nutrients and Their Stoichiometric Ratios as Affected by Long Term Grazing and Enclosing in a Semi-Arid Grassland of Inner Mongolia
	Hu, Juan; Zhou, Daowei; Li, Qiang; Wang, Qicun
通讯作者	Zhou, DW
来源期刊	AGRICULTURE-BASEL
EISSN	2077-0472
出版年	2020
卷号	10 期号:9
英文摘要	Grazing and enclosing are two of the most important grassland managements. In order to evaluate the effects of different managements on the ecosystem balance of grassland, the vertical distributions of soil nutrients and their stoichiometric ratios were determined in the plots of grazing and enclosing over 38 years in a semi-arid grassland of Inner Mongolia. The results showed that total nitrogen (TN), total phosphorus (TP), available nitrogen (AN), calcium (Ca), magnesium (Mg) and sulfur (S) contents in 0-100 cm soil in the long term enclosing plot were lower than the long term grazing plot and these changes were much greater in the surface soil than in deep soil. However, the soil organic carbon (SOC) and available phosphorus (AP) contents in the long term enclosing plot in the surface soil were higher (p< 0.01) compared with the long term grazing plot. In addition, long term enclosing increased the C/N ratio in each soil layer and improved C/K and C/P ratios in the surface soil compared with long term grazing. However, significant decreases of N/P and N/K ratios in the long term enclosing plot in each soil layer were observed. In conclusion, enclosing for 38 years decreased most of nutrients and reduced the nutrients' mineralization in the surface soil especially and thus might restrict nutrients cycling in a semi-arid grassland of Inner Mongolia.
英文关键词	soil nutrients contents stoichiometric ratios vertical distributions long term grazing long term enclosing
类型	Article
语种	英语
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000578261100001
WOS关键词	LAND-USE ; ECOLOGICAL STOICHIOMETRY ; P STOICHIOMETRY ; ORGANIC-CARBON ; TYPICAL STEPPE ; PLANT ; ECOSYSTEM ; NITROGEN ; LIMITATION ; VEGETATION
WOS类目	Agronomy
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/2XILL650/326786
作者单位	[Hu, Juan; Zhou, Daowei; Li, Qiang; Wang, Qicun] Chinese Acad Sci, Northeast Inst Geog & Agroecol, Jilin Prov Lab Grassland Farming, Changchun 130102, Peoples R China
推荐引用方式 GB/T 7714	Hu, Juan,Zhou, Daowei,Li, Qiang,et al. Vertical Distributions of Soil Nutrients and Their Stoichiometric Ratios as Affected by Long Term Grazing and Enclosing in a Semi-Arid Grassland of Inner Mongolia[J],2020,10(9).
APA	Hu, Juan,Zhou, Daowei,Li, Qiang,&Wang, Qicun.(2020).Vertical Distributions of Soil Nutrients and Their Stoichiometric Ratios as Affected by Long Term Grazing and Enclosing in a Semi-Arid Grassland of Inner Mongolia.AGRICULTURE-BASEL,10(9).
MLA	Hu, Juan,et al."Vertical Distributions of Soil Nutrients and Their Stoichiometric Ratios as Affected by Long Term Grazing and Enclosing in a Semi-Arid Grassland of Inner Mongolia".AGRICULTURE-BASEL 10.9(2020).