Spatial variability of soil organic matter in a gravel-sand mulched jujube orchard at field scale

doi:10.1007/s12517-020-05465-w

	Spatial variability of soil organic matter in a gravel-sand mulched jujube orchard at field scale
	Zhao, Wenju 2; Cao, Taohong 2; Li, Zongli 1; Luo, Minqiang 3; Su, Yu 2
刊名	ARABIAN JOURNAL OF GEOSCIENCES
	2020-06-08
卷号	13 期号:12
关键词	Gravel-sand mulch Soil organic matter Spatial variation Kriging interpolation Inverse distance weighting interpolation
ISSN号	1866-7511
DOI	10.1007/s12517-020-05465-w
英文摘要	In agricultural ecosystems, soil organic matter (SOM) is a major determinant and indicator of soil fertility and quality. The objectives of this study were to understand the spatial distribution of SOM and the accuracy of two interpolation methods evaluated: Kriging and inverse distance weighting (IDW) in a gravel-sand mulch of northwest China. We are measuring SOM in 256 soil samples collected from 0 to 10, 10-20, 20-30, and 30-50 cm layers at five sampling scales, 32 x 32, 28 x 28, 24 x 24, 20 x 20, and 16 x 16 m, and three sampling spacings, 4, 8, and 12 m. SOM content decreased with depth in each scale, varying from 2.41 to 5.75 g/kg. The SOM was weakly to moderately variable and has a strong spatial autocorrelation. The standard deviation was small for each soil layer, and the variability was low or weakly moderate, indicating that two interpolation methods were applicable to the entire data set. Kriging interpolation was more accurate than IDW. The distribution of SOM differed in the surface layers at the five sampling scales, which was more uniform as the sampling scale decreased. Eight meter is a reasonable sampling spacing. Through the scales effect and spacing change on SOM for fixed-point monitoring, combing the estimate of SOM to reduce the sampling workload will aid the supply of SOM in gravel-sand mulched fields in arid regions.
WOS研究方向	Geology
语种	英语
出版者	SPRINGER HEIDELBERG
WOS记录号	WOS:000541934400002
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/155165]
专题	能源与动力工程学院
作者单位	1.Minist Water Resources, Gen Inst Water Resources & Hydropower Planning &, Beijing 100120, Peoples R China; 2.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China; 3.Jiangxi Water Resources Planning & Design Inst, Nanchang 330029, Jiangxi, Peoples R China
推荐引用方式 GB/T 7714	Zhao, Wenju,Cao, Taohong,Li, Zongli,et al. Spatial variability of soil organic matter in a gravel-sand mulched jujube orchard at field scale[J]. ARABIAN JOURNAL OF GEOSCIENCES,2020,13(12).
APA	Zhao, Wenju,Cao, Taohong,Li, Zongli,Luo, Minqiang,&Su, Yu.(2020).Spatial variability of soil organic matter in a gravel-sand mulched jujube orchard at field scale.ARABIAN JOURNAL OF GEOSCIENCES,13(12).
MLA	Zhao, Wenju,et al."Spatial variability of soil organic matter in a gravel-sand mulched jujube orchard at field scale".ARABIAN JOURNAL OF GEOSCIENCES 13.12(2020).