气候变化领域集成服务门户(CCPortal): Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China

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DOI	10.1007/s11284-016-1362-y
	Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China
	Luo, Yongqing; Zhao, Xueyong; Li, Yuqiang; Zuo, Xiaoan; Lian, Jie; Wang, Tao
发表日期	2016
ISSN	0912-3814
EISSN	1440-1703
卷号	31 期号:4
英文摘要	Root decomposition is a critical feedback from the plant to the soil, especially in sandy land where strong winds remove aboveground litter. As a pioneer shrub in semi-mobile dunes of the Horqin sandy land, Artemisia halodendron has multiple effects on nutrient capture and the microenvironment. However, its root decomposition has not been studied in terms of its influence on soil organic carbon (SOC) and nitrogen (N). In this study, we buried fine (a parts per thousand currency sign2 mm) and coarse roots in litterbags at a depth of 15 cm below semi-mobile dunes. We measured the masses remaining and the C and N contents at intervals during 434 days of decomposition. The soils below the litterbags were then divided into layers and sampled to measure the SOC and N contents. After rapid initial decomposition, both coarse and fine roots decomposed slowly. After 53 days, 36.2 % of coarse roots and 39.8 % of fine roots had decomposed. In contrast, only 18.4 % of coarse roots and 30.5 % of fine roots decomposed in the following 381 days. Fine roots decomposed significantly faster, and their decomposition rate after the initial rapid decay was strongly related to climate (R (2) = 0.716, P < 0.05). Root decomposition increased SOC and N contents below the litterbags, with larger effects for fine roots. The SOC content was more variable between soil layers than the N content. Thus, decomposition of A. halodendron roots cannot be ignored when studying SOC and N feedbacks from plants to the soil, particularly for fine roots.
关键词	Root decomposition Climate Soil organic carbon Soil nitrogen Sandy land
学科领域	Environmental Sciences & Ecology
语种	英语
WOS研究方向	Ecology
来源期刊	ECOLOGICAL RESEARCH
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/111867
作者单位	Chinese Acad Sci, Cold & Arid Reg Environm & Engn Res Inst, Naiman Desertificat & Farmland Res Stn, 320 Donggang West Rd, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Luo, Yongqing,Zhao, Xueyong,Li, Yuqiang,et al. Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China[J]. 中国科学院西北生态环境资源研究院,2016,31(4).
APA	Luo, Yongqing,Zhao, Xueyong,Li, Yuqiang,Zuo, Xiaoan,Lian, Jie,&Wang, Tao.(2016).Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China.ECOLOGICAL RESEARCH,31(4).
MLA	Luo, Yongqing,et al."Root decomposition of Artemisia halodendron and its effect on soil nitrogen and soil organic carbon in the Horqin Sandy Land, northeastern China".ECOLOGICAL RESEARCH 31.4(2016).