Small-scale spatial variability of soil nutrients and vegetation properties in semi-arid northern China

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	Small-scale spatial variability of soil nutrients and vegetation properties in semi-arid northern China
	Chen, FS ; Zeng, DH ; He, XY
刊名	PEDOSPHERE
	2006
卷号	16 期号:6 页码:778-787
关键词	Pinus sylvestris var. mongolica Litv semi-arid region soil nutrients spatial variability species richness
ISSN号	1002-0160
通讯作者	Zeng, DH, Chinese Acad Sci, Inst Appl Ecol, Daqinggou Ecol Stn, Shenyang 110016, Peoples R China
中文摘要	A field experiment was conducted at Kezuohouqi County, Inner Mongolia Autonomous Region of China, which was located on the southeastern edge of the Horqin Sandy Land, to study the spatial variability of soil nutrients for a smallscale, nutrient-poor, sandy site in a semi-arid region of northern China; to investigate whether or not there were "islands of fertility" at the experimental site; and to determine the key nutrient elements that sustained ecosystem stability. Results obtained from geostatistical analysis indicated that the spatial distribution pattern of soil total nitrogen (STN) was far different from those of soil organic matter (SOM), total phosphorus (STP), and total potassium (STK). Compared to SOM, STP, and STK, STN had a lower structural heterogeneity ratio and a longer range, while other elements were all similar. In addition, STN had an isotropic spatial structure, whereas the others had an anisotropic spatial structure. The spatial structure patterns of herbage species, cover, and height also differed, indicating that spatial variability was subjected to different ecological factors. Differences in the spatial variability patterns among soil nutrients and vegetation properties showed that soil nutrients for a small-scale were not the primary limiting factors that influenced herbage spatial distribution patterns. Incorporating spatial distribution patterns of tree species, namely, Pinus sylvestris var. mongolica Litv. and shrub Lespedeza bicolor Turcz. in a research plot and using fractal dimension, SOM, STP, and STK were shown to contribute to the "islands of fertility" phenomenon, however STN was not, possibly meaning that nitrogen was a key limiting element. Therefore, during restoration of similar ecosystems more attention should be given to soil nitrogen.
学科主题	Soil Science
收录类别	SCI
语种	英语
WOS记录号	WOS:000243943400012
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54761]
专题	沈阳应用生态研究所_沈阳应用生态研究所_期刊论文
推荐引用方式 GB/T 7714	Chen, FS,Zeng, DH,He, XY. Small-scale spatial variability of soil nutrients and vegetation properties in semi-arid northern China[J]. PEDOSPHERE,2006,16(6):778-787.
APA	Chen, FS,Zeng, DH,&He, XY.(2006).Small-scale spatial variability of soil nutrients and vegetation properties in semi-arid northern China.PEDOSPHERE,16(6),778-787.
MLA	Chen, FS,et al."Small-scale spatial variability of soil nutrients and vegetation properties in semi-arid northern China".PEDOSPHERE 16.6(2006):778-787.