Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling

Soil chemical and topographic properties are two important factors influencing available micronutrient distribution of soil in the horizontal dimension. The objective of this study was to explore the relative influence of soil chemistry (including soil pH, soil organic matter, total nitrogen, availa...

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Autores principales:	Zhu,Hongfen, Zhao,Ying, Nan,Feng, Duan,Yonghong, Bi,Rutian
Lenguaje:	English
Publicado:	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo 2016
Materias:	Structural equation modeling (SEM) spatial distribution standardized path coefficients (SPCs) latent variables manifest variables
Acceso en línea:	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000400015
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spelling	oai:scielo:S0718-951620160004000152017-03-07Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modelingZhu,HongfenZhao,YingNan,FengDuan,YonghongBi,Rutian Structural equation modeling (SEM) spatial distribution standardized path coefficients (SPCs) latent variables manifest variables Soil chemical and topographic properties are two important factors influencing available micronutrient distribution of soil in the horizontal dimension. The objective of this study was to explore the relative influence of soil chemistry (including soil pH, soil organic matter, total nitrogen, available phosphorus, and available potassium) and topography (including elevation, slope, aspect, and wetness index) on the availability of micronutrients (Fe, Mn, Cu, Zn, and B) using structural equation modeling (SEM) at the watershed scale. To do this, levels of soil micronutrients, pH, soil organic matter, total nitrogen, available phosphorus, available potassium, and topographic factors were measured at 523 sampling points of Fanshi County on the Chinese Loess Plateau, and the spatial distribution of soil available micronutrients were analyzed by geostatistical method. The results showed that topography had both direct effects and indirect effect on some soil micronutrients, while the indirect effect indicated effects from topography on soil chemistry and then further on micronutrient concentration. Soil chemistry had direct effects on levels of all soil micronutrients, and topography had direct effects on levels of all micronutrients except for Cu and B, and indirect effects on Fe, Zn, and B. The direct effect of soil chemistry on Fe levels was greater than the total effects (including both direct and indirect) of topography. Topography had a stronger direct effect on Mn than soil chemistry, and topography had less direct but stronger total effects on Zn than soil chemistry. Soil chemistry directly influenced both Cu and B, but topography only influenced B in an indirect manner. The semivariance indicated that the micronutrients had moderate spatial dependency except for B which had weak spatial dependency. Within the spatial distribution of the micronutrients, there was a zone in the middle of the watershed with lower values than in the northern and southern areas for Fe, Mn, Zn, and B, which were related to the characteristics of topography and soil chemistry. These results may guide the management of soil micronutrients of the Chinese Loess Plateau and other similar regions in the world.info:eu-repo/semantics/openAccessChilean Society of Soil Science / Sociedad Chilena de la Ciencia del SueloJournal of soil science and plant nutrition v.16 n.4 20162016-12-01text/htmlhttp://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000400015en10.4067/S0718-95162016005000076
institution	Scielo Chile
collection	Scielo Chile
language	English
topic	Structural equation modeling (SEM) spatial distribution standardized path coefficients (SPCs) latent variables manifest variables
spellingShingle	Structural equation modeling (SEM) spatial distribution standardized path coefficients (SPCs) latent variables manifest variables Zhu,Hongfen Zhao,Ying Nan,Feng Duan,Yonghong Bi,Rutian Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
description	Soil chemical and topographic properties are two important factors influencing available micronutrient distribution of soil in the horizontal dimension. The objective of this study was to explore the relative influence of soil chemistry (including soil pH, soil organic matter, total nitrogen, available phosphorus, and available potassium) and topography (including elevation, slope, aspect, and wetness index) on the availability of micronutrients (Fe, Mn, Cu, Zn, and B) using structural equation modeling (SEM) at the watershed scale. To do this, levels of soil micronutrients, pH, soil organic matter, total nitrogen, available phosphorus, available potassium, and topographic factors were measured at 523 sampling points of Fanshi County on the Chinese Loess Plateau, and the spatial distribution of soil available micronutrients were analyzed by geostatistical method. The results showed that topography had both direct effects and indirect effect on some soil micronutrients, while the indirect effect indicated effects from topography on soil chemistry and then further on micronutrient concentration. Soil chemistry had direct effects on levels of all soil micronutrients, and topography had direct effects on levels of all micronutrients except for Cu and B, and indirect effects on Fe, Zn, and B. The direct effect of soil chemistry on Fe levels was greater than the total effects (including both direct and indirect) of topography. Topography had a stronger direct effect on Mn than soil chemistry, and topography had less direct but stronger total effects on Zn than soil chemistry. Soil chemistry directly influenced both Cu and B, but topography only influenced B in an indirect manner. The semivariance indicated that the micronutrients had moderate spatial dependency except for B which had weak spatial dependency. Within the spatial distribution of the micronutrients, there was a zone in the middle of the watershed with lower values than in the northern and southern areas for Fe, Mn, Zn, and B, which were related to the characteristics of topography and soil chemistry. These results may guide the management of soil micronutrients of the Chinese Loess Plateau and other similar regions in the world.
author	Zhu,Hongfen Zhao,Ying Nan,Feng Duan,Yonghong Bi,Rutian
author_facet	Zhu,Hongfen Zhao,Ying Nan,Feng Duan,Yonghong Bi,Rutian
author_sort	Zhu,Hongfen
title	Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
title_short	Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
title_full	Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
title_fullStr	Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
title_full_unstemmed	Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
title_sort	relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling
publisher	Chilean Society of Soil Science / Sociedad Chilena de la Ciencia del Suelo
publishDate	2016
url	http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-95162016000400015
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_version_	1714206542934310912

Relative influence of soil chemistry and topography on soil available micronutrients by structural equation modeling

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