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	Rapid recuperation of soil nitrogen following agricultural abandonment in a karst area, southwest china
	Wen, Li1,2,3; Li, Dejun1,2; Yang, Liqiong1,2,3; Luo, Pan1,2,3; Chen, Hao1,2; Xiao, Kongcao1,2; Song, Tongqing1,2; Zhang, Wei1,2; He, Xunyang1,2; Chen, Hongsong1,2
刊名	Biogeochemistry
	2016-09-01
卷号	129期号:3页码:341-354
关键词	Karst area Post-agriculture succession N accumulation N dynamics Soil n stock Ecological restoration
ISSN号	0168-2563
DOI	10.1007/s10533-016-0235-3
通讯作者	Li, dejun(dejunli@isa.ac.cn)
英文摘要	Soil nitrogen (n) dynamics are crucial for ecosystem development and carbon sequestration. however, n dynamics during post-agriculture succession have not been well understood. here soil n dynamics during post-agriculture succession were investigated in a subtropical karst area, southwest china. the succession sequence includes grassland (similar to 10 years), shrubland (similar to 29 years), secondary forest (similar to 59 years) and primary forest with cropland as reference. the soil is calcareous lithosols. soil n stock (0-15 cm) in the cropland (335.2 +/- 55.1 g n m(-2)) was not significantly different from that in the grassland, but was elevated by 120 to 221 % in the later three succession stages. across the sequence, soil n accumulated with an average rate of 12.4 g n m(-2) yr(-1). soil n stock recovered to the primary forest level in about 67 years following agricultural abandonment. no3 (-) concentrations increased while nh4 (+) concentrations decreased with years following agricultural abandonment. high no3 (-) concentrations (66.5-120.9 mg n kg(-1)) may imply n saturation in the shrubland, secondary forest and primary forest. rates of net n mineralization and nitrification increased with succession. delta n-15 of soil, leaves and litter was significantly elevated in the later three succession stages relative to the grassland, indicating that the n cycle became more open with succession. n release from bedrock weathering was likely a potential n source in addition to atmospheric n deposition and biological n fixation. our study suggests that n would not be the limiting nutrient for secondary succession and ecological restoration in the karst region of southwest china.
WOS关键词	FOREST ECOSYSTEM CARBON ; ORGANIC-CARBON ; LAND-USE ; SECONDARY FORESTS ; NUTRIENT DYNAMICS ; CENTRAL AMAZONIA ; GREEN PROGRAM ; FIXING TREES ; C-STOCKS ; N-STOCKS
WOS研究方向	Environmental Sciences & Ecology ; Geology
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000383104700006
内容类型	期刊论文
URI标识	http://www.corc.org.cn/handle/1471x/2376090
专题	中国科学院大学
通讯作者	Li, Dejun
作者单位	1.Chinese Acad Sci, Inst Subtrop Agr, Key Lab Agroecol Proc Subtrop Reg, 644 Yuanda 2nd Rd, Changsha 410125, Hunan, Peoples R China 2.Chinese Acad Sci, Inst Subtrop Agr, Huanjiang Observat & Res Stn Karst Ecosyst, Huangjiang 547100, Guangxi, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Wen, Li,Li, Dejun,Yang, Liqiong,et al. Rapid recuperation of soil nitrogen following agricultural abandonment in a karst area, southwest china[J]. Biogeochemistry,2016,129(3):341-354.
APA	Wen, Li.,Li, Dejun.,Yang, Liqiong.,Luo, Pan.,Chen, Hao.,...&Wang, Kelin.(2016).Rapid recuperation of soil nitrogen following agricultural abandonment in a karst area, southwest china.Biogeochemistry,129(3),341-354.
MLA	Wen, Li,et al."Rapid recuperation of soil nitrogen following agricultural abandonment in a karst area, southwest china".Biogeochemistry 129.3(2016):341-354.

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