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	Contents of soil organic carbon and nitrogen in water-stable aggregates in abandoned agricultural lands in an arid ecosystem of Northwest China
	Wang Junqiang1,2; Liu Lichao1; Qiu Xiaoqing3; Wei Yujie2; Li Yanrong2; Shi Zhiguo2
刊名	JOURNAL OF ARID LAND
	2016-06-01
卷号	8期号:3页码:350-363
关键词	aggregate stability water-stable aggregates agricultural abandonment soil organic carbon total nitrogen northwestern China
ISSN号	1674-6767
DOI	10.1007/s40333-016-0042-7
通讯作者	Wang Junqiang(wangjunq0303@163.com)
英文摘要	Soil organic matter content in water-stable aggregates (WSA) in the arid ecosystems (abandoned agricultural lands especially) of China is poorly understood. In this study, we examined the WSA sizes and stability, and soil organic carbon (OC) and nitrogen (N) contents in agricultural lands with abandonment ages of 0, 3, 12, 20, 30 and 40 years, respectively, in the Minqin Oasis of Northwest China. The total soil OC and N contents at depths of 0-20, 20-40 and 40-60 cm in abandoned agricultural lands were compared to those in cultivated land (the control). Agricultural land abandonment significantly (P < 0.05) influenced the distribution of MWD (mean weight diameter), and OC and N contents. There were significant increases in MWD and the proportion of macroaggregates (sizes > 0.25 mm) as the age of agricultural land abandonment increased. The effect of abandonment ages of agricultural lands on MWD was determined by the changes of OC and N accumulation in WSA sizes > 2 mm. The total OC and N contents presented a stratification phenomenon across soil depths in this arid ecosystem. That is, both of them decreased significantly at depths of 0-20 and 40-60 cm while increased at the depth of 20-40 cm. The WSA sizes < 0.053 mm had the highest soil OC and N contents (accounting for 51.41%-55.59% and 42.61%-48.94% of their total, respectively). Soil OC and N contents in microaggregates (sizes 0.053-0.25 mm) were the dominant factors that influenced the variations of total OC and N contents in abandoned agricultural lands. The results of this study suggested that agricultural land abandonment may result in the recovery of WSA stability and the shifting of soil organic matter from the silt+clay (< 0.053 mm) and microaggregate fractions to the macroaggregate fractions. However, agricultural land abandonment did not increase total soil OC and N contents in the short-term.
收录类别	SCI
WOS关键词	PHYSICAL-PROPERTIES ; DENSITY FRACTIONS ; SILTY SOILS ; MATTER ; STABILITY ; DYNAMICS ; GRASSLAND ; TILLAGE ; MANURE ; ACCUMULATION
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Environmental Sciences
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000373138300004
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2557269
专题	寒区旱区环境与工程研究所
通讯作者	Wang Junqiang
作者单位	1.Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Lanzhou 730000, Peoples R China 2.Gansu Acad Agr Engn & Technol, Wuwei 733006, Peoples R China 3.Gansu Polytech Coll Anim Husb & Engn, Wuwei 733006, Peoples R China
推荐引用方式 GB/T 7714	Wang Junqiang,Liu Lichao,Qiu Xiaoqing,et al. Contents of soil organic carbon and nitrogen in water-stable aggregates in abandoned agricultural lands in an arid ecosystem of Northwest China[J]. JOURNAL OF ARID LAND,2016,8(3):350-363.
APA	Wang Junqiang,Liu Lichao,Qiu Xiaoqing,Wei Yujie,Li Yanrong,&Shi Zhiguo.(2016).Contents of soil organic carbon and nitrogen in water-stable aggregates in abandoned agricultural lands in an arid ecosystem of Northwest China.JOURNAL OF ARID LAND,8(3),350-363.
MLA	Wang Junqiang,et al."Contents of soil organic carbon and nitrogen in water-stable aggregates in abandoned agricultural lands in an arid ecosystem of Northwest China".JOURNAL OF ARID LAND 8.3(2016):350-363.

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