干旱区生态环境知识资源中心(Arid): Distribution of organic carbon fractions in soil aggregates in Chinese fir plantations with different stand ages

Arid

DOI	10.1186/s13717-021-00321-5
	Distribution of organic carbon fractions in soil aggregates in Chinese fir plantations with different stand ages
	He, Xinxin; Huang, Yongzhen; Zhang, Qianchun; Ye, Shaoming; Wang, Shengqiang
通讯作者	Wang, SQ (corresponding author), Guangxi Univ, Forestry Coll, Nanning 530004, Peoples R China.
来源期刊	ECOLOGICAL PROCESSES
EISSN	2192-1709
出版年	2021
卷号	10 期号:1
英文摘要	Background Revealing the variations in soil aggregate-related organic carbon (OC) and labile organic carbon (LOC) fractions in a chronosequence of Chinese fir plantations plays an important role in better understanding the impact of soil carbon sink or source on the Chinese fir plantation ecosystem. In this study, soil samples in a depth of 0-20 cm were collected from Chinese fir plantations at different stand ages (0, 9, 17, and 26 years old) in Guangxi, China. With the optimal moisture sieving method adopted, the soil aggregates of 4 different sizes were obtained, including > 2-mm, 2-1-mm, 1-0.25-mm, and < 0.25-mm aggregates. Soil OC and LOC fractions were measured in the aggregates of different sizes. The LOC fractions included readily oxidizable carbon (ROC), particulate organic carbon (POC), microbial biomass carbon (MBC), water-soluble organic carbon (WOC), and mineralized organic carbon (MOC). Results Soil aggregate stability, as indicated by the mean weight diameter (MWD), was the highest in the 17-year-old Chinese fir plantations and was significantly positively related (p < 0.05) to the concentrations of OC and LOC fractions (except for the ROC and MOC), with the POC in particular. As for all stand ages of Chinese fir plantations, the concentrations of soil OC and LOC fractions were significantly increased as the aggregate size decreased. Consequently, there were more OC and LOC fractions distributed in the < 0.25-mm aggregates. During the stand development, the concentrations of soil OC and LOC fractions first increased and then decreased, with the highest levels detected in the 17-year-old Chinese fir plantations, indicating that the 17-year-old Chinese fir plantations were conducive to the accumulation of soil OC and LOC fractions. Conclusion After 17 years of planting, promoted soil carbon (especially for the POC) accumulation contributes significantly to enhancing soil aggregate stability for the Chinese fir plantations in Guangxi, China.
英文关键词	Chinese fir plantation Soil aggregates Organic carbon Labile organic carbon fractions
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:000674253900001
WOS关键词	LAND-USE CHANGE ; LOESS PLATEAU ; MATTER ; MINERALIZATION ; MANAGEMENT ; STOCKS ; PARTICULATE ; CONVERSION ; SYSTEMS ; OASIS
WOS类目	Ecology ; Environmental Sciences
WOS研究方向	Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/363018
作者单位	[He, Xinxin; Huang, Yongzhen; Zhang, Qianchun; Ye, Shaoming; Wang, Shengqiang] Guangxi Univ, Forestry Coll, Nanning 530004, Peoples R China
推荐引用方式 GB/T 7714	He, Xinxin,Huang, Yongzhen,Zhang, Qianchun,et al. Distribution of organic carbon fractions in soil aggregates in Chinese fir plantations with different stand ages[J],2021,10(1).
APA	He, Xinxin,Huang, Yongzhen,Zhang, Qianchun,Ye, Shaoming,&Wang, Shengqiang.(2021).Distribution of organic carbon fractions in soil aggregates in Chinese fir plantations with different stand ages.ECOLOGICAL PROCESSES,10(1).
MLA	He, Xinxin,et al."Distribution of organic carbon fractions in soil aggregates in Chinese fir plantations with different stand ages".ECOLOGICAL PROCESSES 10.1(2021).