干旱区生态环境知识资源中心(Arid): Field-scale spatial variability of soil calcium in a semi-arid region: Implications for soil erosion and site-specific management

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	Field-scale spatial variability of soil calcium in a semi-arid region: Implications for soil erosion and site-specific management
	Sun Yazhou; Guo Wenxuan; Weindorf David C; Sun Fujun; Deb Sanjit; Cao Guofeng; Neupane Jasmine; Lin Zhe; Raihan Abir
来源期刊	Pedosphere
ISSN	1002-0160
出版年	2021
卷号	31 期号:5 页码:705-714
英文摘要	Excess calcium (Ca) in soils of semi-arid and arid regions has negative effects on soil structure and chemical properties, which limits the crop root growth as well as the availability of soil water and nutrients. Quantifying the spatial variability of soil Ca contents may reveal factors influencing soil erosion and provide a basis for site-specific soil and crop management in semi-arid regions. This study sought to assess the spatial variability of soil Ca in relation to topography, hydraulic attributes, and soil types for precision soil and crop management in a 194-ha production field in the Southern High Plains of Texas, USA. Soils at four depth increments (0-2, 0-15, 15-30, and 30-60 cm) were sampled at 232 points in the spring of 2017. The Ca content of each sample was determined with a DP-6000 Delta Premium portable X-ray fluorescence (PXRF) spectrometer. Elevation data was obtained using a real-time kinematic GPS receiver with centimeter-level accuracy. A digital elevation model (DEM) was derived from the elevation data, and topographic and hydraulic attributes were generated from this DEM. A generalized least-squares model was then developed to assess the relationship between soil Ca contents of the four layers and the topographic and hydraulic attributes. Results showed that topographic attributes, especially slope and elevation, had a significant effect on soil Ca content at different depths (P < 0.01). In addition, hydraulic attributes, especially flow length and sediment transport index (STI), had a significant effect on the spatial distribution of soil Ca. Spatial variability of soil Ca and its relationships with topographic and hydraulic attributes and soil types indicated that surface soil loss may occur due to water or wind erosion, especially on susceptible soils with high slopes. Therefore, this study suggests that the application of PXRF in assessing soil Ca content can potentially facilitate a new method for soil erosion evaluation in semi-arid lands. The results of this study provide valuable information for site-specific soil conservation and crop management.
英文关键词	hydraulic attributes portable X-ray fluorescence spectrometry precision agriculture soil conservation topography
类型	Article
语种	英语
收录类别	CSCD
WOS类目	Agriculture
CSCD记录号	CSCD:7054116
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/377470
作者单位	Sun Yazhou, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, USA.; Deb Sanjit, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, USA.; Neupane Jasmine, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, USA.; Lin Zhe, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, USA.; Raihan Abir, Department of Plant and Soil Science, Texas Tech University, Lubbock, TX 79409, USA.; Guo Wenxuan, Department of Plant and Soil Science, Texas Tech University;;Department of Soil and Crop Sciences, Texas A&M AgriLife Research, ;;, Lubbock;;Lubbock, USA;;USA TX 79409;;TX 79403.; Weindorf David C, Department of Earth and Atmospheric Sciences, Central Michigan University, Mount Pleasant, 48859, USA.; Sun Fujun, College of Land and Environment, Shenyang Agricultural University, Shenyang, Liaoning 110866, China.; Cao Guofeng, Department of Geography, University of Colorado, Boulder, CO 80309, USA.
推荐引用方式 GB/T 7714	Sun Yazhou,Guo Wenxuan,Weindorf David C,et al. Field-scale spatial variability of soil calcium in a semi-arid region: Implications for soil erosion and site-specific management[J],2021,31(5):705-714.
APA	Sun Yazhou.,Guo Wenxuan.,Weindorf David C.,Sun Fujun.,Deb Sanjit.,...&Raihan Abir.(2021).Field-scale spatial variability of soil calcium in a semi-arid region: Implications for soil erosion and site-specific management.Pedosphere,31(5),705-714.
MLA	Sun Yazhou,et al."Field-scale spatial variability of soil calcium in a semi-arid region: Implications for soil erosion and site-specific management".Pedosphere 31.5(2021):705-714.