干旱区生态环境知识资源中心(Arid): 内蒙古高原针茅草群落土壤水分和碳、氮分布的小尺度空间异质性

Arid

	内蒙古高原针茅草群落土壤水分和碳、氮分布的小尺度空间异质性
其他题名	On the Small Scale Spatial Heterogeneity of Soil Moisture, Carbon and Nitrogen in Stipa Communities of the Inner Mongolia Plateau
	白永飞 1; 许志信 2; 李德新 2
来源期刊	生态学报
ISSN	1000-0933
出版年	2002
卷号	22 期号:8 页码:1215-1223
中文摘要	用地统计学的方法，研究比较了内蒙古高原4类地带性针茅草原群落，贝加尔针茅(Stipa baicalensis)群落、大针茅(S. grandis)群落、克氏针茅(S. krylovii)群落和小针茅(S. kelemenzii)群落0-20cm土壤水分和碳、氮的小尺度空间异质性特征，结果表明：4类群落土壤水分、有机碳和全氮均表现出显著的小尺度空间结构特征，自相关尺度为1.91m-10.81m，结构性方差占样本方差的35.31%-99.74%。从贝加尔针茅群落到小针茅群落空间自相关的尺度逐渐增大，纹理有逐渐变粗的趋势。土壤水分、碳和氮的小尺度空间格局共同作用于群落的生态学过程，即土壤水分格局植物种群格局(基本斑块的大小)土壤碳空间格局土壤氮空间格局。同时，由于生态学过程的反馈作用，土壤氮空间格局种群格局土壤水分格局。土壤属性空间自相关尺度的改变可能是导致群落演替的驱动力，草原退化可能与土壤异质性尺度的改变相关。
英文摘要	Grassland Vegetation Inner Mongolia Plateau is the main part of the central Eurasian Steppe region. The gradient distribution of precipitation and temperature is the main factor that affects the zonal distribution of grassland vegetation in the Plateau. Grassland vegetation in the plateau can be divided into three sub-vegetation zones: meadow steppe, typical steppe, and desert steppe. They are distributed successively from the east to the west with the increase in temperature and decrease in precipitation. Among them, Form. Stipa baicalensis in the meadow steppe, Form. Stipa grandis and Form. Stipa krylovii in the typical steppe, and Form. Stipa klemenzii in the desert steppe are representative communities of Stipa steppe, in the plateau. In this paper, we designed the present study to address the specific need for information about heterogeneity in grassland ecosystems in the Inner Mongolia plateau. Our study sites were located at Ewenke Qi, Xiwu Qi, Abage Qi and Damao Qi respectively, the typical areas of Stipa steppe in the Inner Mongolia Plateau. They are dominated by four Stipa species, i. e. S. baicalensis, S. grandis, S. krylovii, and S. klemenzii respectively. We established an 8m * 12 m plot in each of the 4 sites. In each case, we attempted to sample a level and apparently topographically uniform field site to avoid anisotropic effects. In each plot, a sampling grid of 40 points was established at two spatial scales. First, the plot was divided into 24 cells, each 2m2m in size, and a sampling point was located randomly in each cell. One additional point was cast randomly to locate a 2m 2m subplot in the 8 * 12 plot. It was divided into 16 0.5m * 0.5m cells. Each sample was a 4.5cm diameter soil core taken from 1 to 20 cm depth. Soils were sampled over a 20 d period in the mid August. This corresponds with the approximate time of peak aboveground standing crop in each site. We use geostaticics to describe the spatial variation in soil moisture, carbon and nitrogen in different Stipa communities by calculation of semi-variogram, which shows the average variance found in comparisons of samples take at increasing distance interval. Spherical model was used to fit the from of semi-variogram. The results showed that within-site variability of three soil properties (soil water, organic carbon and total nitrogen) were highly spatially dependent for all experiment sites.
中文关键词	针茅草原 ; 土壤水分、碳、氮 ; 空间异质性 ; 半方差分析 ; 空间自相关
英文关键词	inner mongolia plateau stipa communities soil moisture carbon and nitrogen small -scale heterogeneity semi-variance analysis spatial autocorrelation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	AGRICULTURE MULTIDISCIPLINARY
WOS研究方向	Agriculture
CSCD记录号	CSCD:1067491
来源机构	中国科学院植物研究所 ; 内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/203390
作者单位	1.中国科学院植物研究所, 植被数量生态学开放研究实验室, 北京 100093, 中国; 2.内蒙古农业大学, 呼和浩特, 内蒙古 010018, 中国
推荐引用方式 GB/T 7714	白永飞,许志信,李德新. 内蒙古高原针茅草群落土壤水分和碳、氮分布的小尺度空间异质性[J]. 中国科学院植物研究所, 内蒙古农业大学,2002,22(8):1215-1223.
APA	白永飞,许志信,&李德新.(2002).内蒙古高原针茅草群落土壤水分和碳、氮分布的小尺度空间异质性.生态学报,22(8),1215-1223.
MLA	白永飞,et al."内蒙古高原针茅草群落土壤水分和碳、氮分布的小尺度空间异质性".生态学报 22.8(2002):1215-1223.