干旱区生态环境知识资源中心(Arid): Spatial variability of soil organic matter in a gravel-sand mulched jujube orchard at field scale

Arid

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 1; Cao, Taohong 1; Li, Zongli 2; Luo, Minqiang 3; Su, Yu 1
通讯作者	Zhao, Wenju
来源期刊	ARABIAN JOURNAL OF GEOSCIENCES
ISSN	1866-7511
EISSN	1866-7538
出版年	2020
卷号	13 期号:12
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.
英文关键词	Gravel-sand mulch Soil organic matter Spatial variation Kriging interpolation Inverse distance weighting interpolation
类型	Review
语种	英语
国家	Peoples R China
收录类别	SCI-E
WOS记录号	WOS:000541934400002
WOS关键词	TOTAL NITROGEN ; CARBON ; PREDICTION ; PATTERNS ; NUTRIENTS ; MOISTURE
WOS类目	Geosciences, Multidisciplinary
WOS研究方向	Geology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/319401
作者单位	1.Lanzhou Univ Technol, Coll Energy & Power Engn, Lanzhou 730050, Peoples R China; 2.Minist Water Resources, Gen Inst Water Resources & Hydropower Planning &, Beijing 100120, 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],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).