Spatial variability of nutrient properties in black soil of northeast China

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	Spatial variability of nutrient properties in black soil of northeast China
	Zhang, XY ; Sui, YY ; Zhang, XD ; Meng, K ; Herbert, SJ
刊名	PEDOSPHERE
	2007
卷号	17 期号:1 页码:19-29
关键词	black soil China geostatistics analysis soil survey spatial variability
ISSN号	1002-0160
通讯作者	Zhang, XY, Chinese Acad Sci, NE Inst Geog & Agroecol, Harbin 150081, Peoples R China
中文摘要	A total of 1400 soil samples from the plow layer (0-20 cm) at an approximate interval of 5 km were collected in the autumn of 2002 over the entire black soil arable crops region to determine the spatial variability of seven variables, such as total organic matter content (OMC), total N, total P, total K, alkali-dissolvable N (AN), available P (AP) and available K (AK), with classical statistics and geostatistical analysis across the entire black soil area in Northeast China. In nonsampled areas ordinary kriging was utilized for interpolation of estimated nutrient determinations. Classical statistics revealed highly significant (P <= 0.01) correlations with all seven of the soil properties, except for OMC with AP and total K with AK. In addition, using coefficients of variation, all soil properties, except for total K, were moderately variable. A geostatistical analysis indicated that structural factors, such as parent material, terrain, and water table, were the main causes of the spatial correlations. Strong spatial correlations were noted with OMC, total N, total P, AN, and AP, while they were moderate for total K and AK. The effective spatial autocorrelation of OMC, total N, total P, and AN ranged from 1037 to 1353 km, whereas the ranges of total K, AP, and AK were only from 6 to 138 km. The fit of the experimental semi-variograms to the theoretical models indicated that except for AN, kriging could successfully interpolate other six variables. Thus, the geostatistical method used on a large scale could accurately evaluate the spatial variability of most black soil nutrient properties in Northeast China.
学科主题	Soil Science
收录类别	SCI
语种	英语
WOS记录号	WOS:000245046200003
公开日期	2011-09-23
内容类型	期刊论文
源URL	[http://210.72.129.5/handle/321005/54741]
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	Zhang, XY,Sui, YY,Zhang, XD,et al. Spatial variability of nutrient properties in black soil of northeast China[J]. PEDOSPHERE,2007,17(1):19-29.
APA	Zhang, XY,Sui, YY,Zhang, XD,Meng, K,&Herbert, SJ.(2007).Spatial variability of nutrient properties in black soil of northeast China.PEDOSPHERE,17(1),19-29.
MLA	Zhang, XY,et al."Spatial variability of nutrient properties in black soil of northeast China".PEDOSPHERE 17.1(2007):19-29.