干旱区生态环境知识资源中心(Arid): Caragana korshinskii Kom. plantation reduced soil aggregate stability and aggregate-associated organic carbon on desert steppe

Arid

DOI	10.7717/peerj.12507
	Caragana korshinskii Kom. plantation reduced soil aggregate stability and aggregate-associated organic carbon on desert steppe
	Lu, Qi; Ma, Hongbin; Zhou, Yao; Calvelo-Pereira, Roberto; Shen, Yan
通讯作者	Ma, HB
来源期刊	PEERJ
ISSN	2167-8359
出版年	2022
卷号	10
英文摘要	Background: After implementing of the Grain-for-Green project, Caragana korshinskii Kom. has been widely planted in China's arid regions. Although natural restoration grassland and artificial Caragana plantations measures have long been focuses in carbon research, the combined influence of natural restoration grassland and artificial Caragana plantation measures on aggregate stability and the aggregate-associated organic carbon (OC) remains unclear. Method: We selected natural grassland (NG) and three different densities of Caragana plantations (high planting density, HG; middle planting density, MD; low planting density, LD) on desert steppe. The soil aggregate distribution and stability index such as fractal dimension (D), mean weight diameter (MWD), geometric mean diameter (GMD), percentage of aggregation destruction (PAD), as well as aggregate-associated OC concentration and stock were measured. Results: Results shows that the soil aggregates were primarily macroaggregates (>2 mm) and mesoaggregates (0.25-2 mm) under dry sieving while microaggregates (<0.25 mm) were preponderant under wet sieving (more than 57%). Overall, compared with Caragana plantations, the MWD (4.43 and 4.51 mm) and GMD (1.72 and 1.83 mm) were both highest in two soil layers under the NG and the D (2.77 and 2.71) was lowest. Compared with the NG, the aggregate-associated OC stocks in the 0-40 cm depths in the LD, MD, and HD decreased by 41.54%, 46.93%, and 42.03%, respectively. SOC stock was mainly concentrated in the soil aggregate with sizes of >2 mm and <0.25 mm. These results suggested that natural grassland restoration measures could improve the soil aggregate stability and aggregate-associated OC concentration better than Caragana plantation restoration measures, which NG may be optimal for increasing carbon sequestration and stabilizing soil aggregates on desert steppe.
英文关键词	Caragana shrubs Desert steppe grassland Soil aggregate stability Aggregate-associated organic carbon
类型	Article
语种	英语
开放获取类型	Green Published, gold
收录类别	SCI-E
WOS记录号	WOS:000756689100007
WOS关键词	LAND-USE CHANGE ; LOESS PLATEAU ; MATTER ; WATER ; SEQUESTRATION ; GRASSLAND ; NITROGEN ; STOCKS ; COMMUNITIES ; FRACTIONS
WOS类目	Multidisciplinary Sciences
WOS研究方向	Science & Technology - Other Topics
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/376291
推荐引用方式 GB/T 7714	Lu, Qi,Ma, Hongbin,Zhou, Yao,et al. Caragana korshinskii Kom. plantation reduced soil aggregate stability and aggregate-associated organic carbon on desert steppe[J],2022,10.
APA	Lu, Qi,Ma, Hongbin,Zhou, Yao,Calvelo-Pereira, Roberto,&Shen, Yan.(2022).Caragana korshinskii Kom. plantation reduced soil aggregate stability and aggregate-associated organic carbon on desert steppe.PEERJ,10.
MLA	Lu, Qi,et al."Caragana korshinskii Kom. plantation reduced soil aggregate stability and aggregate-associated organic carbon on desert steppe".PEERJ 10(2022).