干旱区生态环境知识资源中心(Arid): Accumulation of organic carbon and its association with macro-aggregates during 100 years of oasis formation

Arid

DOI	10.1016/j.catena.2018.09.044
	Accumulation of organic carbon and its association with macro-aggregates during 100 years of oasis formation
	Li, Chenhua 1; Li, Yan1 ; Xie, Jiangbo 2; Liu, Yan 1; Wang, Yugang 1; Liu, Xuecan 1
通讯作者	Li, Yan
来源期刊	CATENA
ISSN	0341-8162
EISSN	1872-6887
出版年	2019
卷号	172 页码:770-780
英文摘要	The maintenance and accumulation of soil organic carbon (SOC) is critical to the agricultural sustainability and environmental stability in oasis-desert belts. The objective of this study was to determine the effects of oasis formation on SOC and aggregate structure, as well as the linkage between them, throughout a 0-200 cm soil profile. The investigation was conducted in five oases at the northern foot of the Tianshan Mountains in Central Asia. Oasis farmlands reclaimed 3, 5, 10, 20, 50, and > 100 years ago were compared with the desert pairs they originated from. The SOC content significantly increased throughout the whole profile after 20 years of reclamation, despite a loss in the first 10 years of reclamation. The values reached maxima at 50 years of reclamation, which increased by 67-135% compared to initial values. The macro-aggregate (diameter > 0.25 mm) fraction with high carbon (C) concentration significantly increased throughout the soil profile after reclamation, and showed the greatest variation during oasis formation, compared with the other aggregate fractions (0.25-0.053 and < 0.053 mm). These changes were significantly correlated with increases in soil nutrients and microbial biomass and decreases in soil pH and salt during oasis formation. In conclusion, the oasis formation enhanced SOC accumulation not only in topsoil but also in deep soil, and soil aggregate structure was improved by increased macro-aggregates. The formation of macro-aggregates and the increase in their associated C had significant correlations with SOC accumulation. Fertilization, especially inorganic nitrogen, very likely promoted the SOC accumulation and soil aggregation in concert with annual input of crop residues into the originally poor desert soils during oasis formation.
英文关键词	Oasis formation Soil profile Soil organic carbon (SOC) Nitrogen (N) Macro-aggregate
类型	Article
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000449136800069
WOS关键词	SOIL MICROBIAL COMMUNITIES ; NO-TILLAGE ; NITROGEN ADDITION ; CULTIVATED SOILS ; CROPPING SYSTEMS ; TROPICAL SOILS ; MATTER ; DESERT ; WATER ; STABILITY
WOS类目	Geosciences, Multidisciplinary ; Soil Science ; Water Resources
WOS研究方向	Geology ; Agriculture ; Water Resources
来源机构	中国科学院新疆生态与地理研究所
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/214805
作者单位	1.Chinese Acad Sci, Xinjiang Inst Ecol & Geog, State Key Lab Desert & Oasis Ecol, Urumqi 830011, Peoples R China; 2.Zhejiang A&F Univ, State Key Lab Subtrop Silviculture, Hangzhou 311300, Zhejiang, Peoples R China
推荐引用方式 GB/T 7714	Li, Chenhua,Li, Yan,Xie, Jiangbo,et al. Accumulation of organic carbon and its association with macro-aggregates during 100 years of oasis formation[J]. 中国科学院新疆生态与地理研究所,2019,172:770-780.
APA	Li, Chenhua,Li, Yan,Xie, Jiangbo,Liu, Yan,Wang, Yugang,&Liu, Xuecan.(2019).Accumulation of organic carbon and its association with macro-aggregates during 100 years of oasis formation.CATENA,172,770-780.
MLA	Li, Chenhua,et al."Accumulation of organic carbon and its association with macro-aggregates during 100 years of oasis formation".CATENA 172(2019):770-780.