干旱区生态环境知识资源中心(Arid): Spatial Variations in Fine Root Turnover, Biomass, and Necromass of Two Vegetation Types in a Karst Ecosystem, Southwestern China

Arid

DOI	10.3390/f13040611
	Spatial Variations in Fine Root Turnover, Biomass, and Necromass of Two Vegetation Types in a Karst Ecosystem, Southwestern China
	Pan, Fujing; Qian, Qian; Liang, Yueming; Wang, Kelin; Zhang, Wei
通讯作者	Zhang, W
来源期刊	FORESTS
EISSN	1999-4907
出版年	2022
卷号	13 期号:4
英文摘要	Revealing the patterns of fine root turnover traits can aid our understanding of the mechanisms of fine roots in adapting to soil nutrient changes. In a karst ecosystem of southwest China, the fine root turnover rate, production, biomass, necromass, biomass/necromass ratio, as well as the soil total and available nitrogen (N) and phosphorus (P) concentrations, and root carbon (C) and N concentrations were analyzed in upper, middle, and lower slope positions of two vegetation types (shrubland and forest). The results showed that the soil total and available N and P and fine root production, biomass, and necromass were significantly higher in upper slope positions than those in lower slope positions in both vegetation types. However, the fine root turnover rates were slightly higher in upper positions than those in lower positions. In addition, fine root necromass was significantly lower in shrubland than that in forest, while the biomass/necromass ratio was the opposite. Therefore, fine root production and biomass were significantly affected by slope position, while the fine root biomass/necromass ratio was significantly influenced by vegetation type. Additionally, fine root necromass was significantly influenced by the slope position and vegetation, but the turnover rate was slightly impacted by the two factors. It was also found that fine root production, biomass, and necromass had significant positive correlations with the soil total and available N and P and root C concentrations, and had significant negative correlations with root N concentrations. Moreover, the biomass/necromass ratio was positively and negatively related to the root N concentrations and C/N ratios, respectively. Thus, the variations in these five parameters of fine root turnover were mainly explained by fine root nutrients and the interactive effects between fine root and soil nutrients. The above results indicated that these variations in fine roots responding to soil and root nutrient changes might be an adaptive mechanism to enhance plant nutrient acquisition in nutrient-poor karst ecosystems.
英文关键词	biomass fine root turnover necromass production karst ecosystem
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:000785087100001
WOS关键词	SOIL ORGANIC-CARBON ; FAGUS-SYLVATICA L. ; UNDERSTOREY VEGETATION ; ROCKY DESERTIFICATION ; SCOTS PINE ; DYNAMICS ; FOREST ; NITROGEN ; RESTORATION ; SUCCESSION
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/2XILL650/392616
推荐引用方式 GB/T 7714	Pan, Fujing,Qian, Qian,Liang, Yueming,et al. Spatial Variations in Fine Root Turnover, Biomass, and Necromass of Two Vegetation Types in a Karst Ecosystem, Southwestern China[J],2022,13(4).
APA	Pan, Fujing,Qian, Qian,Liang, Yueming,Wang, Kelin,&Zhang, Wei.(2022).Spatial Variations in Fine Root Turnover, Biomass, and Necromass of Two Vegetation Types in a Karst Ecosystem, Southwestern China.FORESTS,13(4).
MLA	Pan, Fujing,et al."Spatial Variations in Fine Root Turnover, Biomass, and Necromass of Two Vegetation Types in a Karst Ecosystem, Southwestern China".FORESTS 13.4(2022).