干旱区生态环境知识资源中心(Arid): The Characteristics of Soil C, N, and P Stoichiometric Ratios as Affected by Geological Background in a Karst Graben Area, Southwest China

Arid

DOI	10.3390/f10070601
	The Characteristics of Soil C, N, and P Stoichiometric Ratios as Affected by Geological Background in a Karst Graben Area, Southwest China
	Yang, Hui 1,2; Zhang, Peng1,2,3 ; Zhu, Tongbin 1,2; Li, Qiang 1,2; Cao, Jianhua 1,2
通讯作者	Zhu, Tongbin
来源期刊	FORESTS
EISSN	1999-4907
出版年	2019
卷号	10 期号:7
英文摘要	Understanding ecological stoichiometric characteristics of soil nutrient elements is crucial to guide ecological restoration and agricultural cultivation in karst rocky desertification region, but the information about the effect of the geological background on ecological stoichiometric ratios remains unknown. Soils from different landforms, including a basin, slope, and plateau, were sampled to investigate the spatial variance of the ecological stoichiometric characteristics of soil carbon (C), nitrogen (N), and phosphorus (P) under different rocky desertification grades (LRD:light rocky desertification; MRD:moderate rocky desertification; and SRD:severe rocky desertification) in a karst graben basin of Southwest China. Soil C:N ratio was not significantly influenced by rocky desertification grade, which was at a relatively stable level in the same landform, but soil C:P and N:P ratios increased with increasing rocky desertification grade. This change was consistent with increased soil organic carbon (SOC) and total nitrogen (TN) concentrations in the same geomorphic location along with the intensification of rocky desertification, but soil P concentration remained at a relatively stable level, indicating that P may be the limiting macronutrient for plant growth during vegetation restoration in a karst graben area. The soil C:N ratio of slope land was larger than that of the basin and plateau, while the soil C:P ratio and N:P ratio of the slope and plateau were significantly larger than that of the basin. The correlations between pH and C, N, and P stoichiometry decreased significantly when Ca was used as a control variable. In sharp contrast, the correlations between Ca and C, N, and P stoichiometry were highly significant no matter whether pH was used as a control variable, suggesting the important role of Ca in soil C, N, and P stoichiometry in karst graben basins.
英文关键词	stoichiometric ratios landform rocky desertification karst graben basin
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	Green Submitted, gold
收录类别	SCI-E
WOS记录号	WOS:000482080800039
WOS关键词	ROCKY DESERTIFICATION ; CALCIUM ; CLIMATE ; REGION ; CARBON ; RARE
WOS类目	Forestry
WOS研究方向	Forestry
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/215700
作者单位	1.MNR & Guangxi, Inst Karst Geol, CAGS, Karst Dynam Lab, Guilin 541004, Peoples R China; 2.Auspices UNESCO, Int Res Ctr Karst, Guilin 541004, Peoples R China; 3.China Univ Geosci Beijing, Sch Water Resources & Environm, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Yang, Hui,Zhang, Peng,Zhu, Tongbin,et al. The Characteristics of Soil C, N, and P Stoichiometric Ratios as Affected by Geological Background in a Karst Graben Area, Southwest China[J],2019,10(7).
APA	Yang, Hui,Zhang, Peng,Zhu, Tongbin,Li, Qiang,&Cao, Jianhua.(2019).The Characteristics of Soil C, N, and P Stoichiometric Ratios as Affected by Geological Background in a Karst Graben Area, Southwest China.FORESTS,10(7).
MLA	Yang, Hui,et al."The Characteristics of Soil C, N, and P Stoichiometric Ratios as Affected by Geological Background in a Karst Graben Area, Southwest China".FORESTS 10.7(2019).