Revegetation induced change in soil erodibility as influenced by slope situation on the Loess Platea

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论文题目:	Revegetation induced change in soil erodibility as influenced by slope situation on the Loess Plateau
英文论文题目:	Revegetation induced change in soil erodibility as influenced by slope situation on the Loess Plateau
第一作者:	Guo, Mingming
英文第一作者:	Guo, Mingming
联系作者:	Wang, Wenlong
英文联系作者:	Wang, Wenlong
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英文外单位作者单位:
发表年度:	2021
卷:	772
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摘要:	Soil erodibility is an indispensable parameter for predicting soil erosion and evaluating the benefits of soil and water conservation. Slope situation can alter revegetation and its effects on soil properties and root traits, and thus may affect soil erodibility. However, whether slope situation will change the effect of revegetation on soil erodibility through improving soil properties and root traits has rarely been evaluated. Therefore, this study was conducted to detect the response of soil erodibility to slope situations (loess-tableland, hill-slope and gullyslope) in a typical watershed of the Loess Plateau. Five soil erodibility parameters (saturated soil hydraulicconductivity, SHe mean weight diameter of aggregates, MWD: clay ratio, CR: soil disintegration rate, SDR; soil erodibility factor, K) and a comprehensive soil erodibility index (CSEI) are selected to darify the study targets. The results revealed that soil properties, root traits, soil erodibility parameters and GE( were affected by slope situation significantly. Soil and root can explain 79.7%, 79.1% and 69.8% of total variance in soil erodibility of loess-tableland, hillslope and gully-slope, respectively. Slope situation influenced soil erodibility by changing the effects of revegetation on soil properties and root traits. Evidently, the slope situation greatly changed the relations between CSEI and soil and root parameters, whereafter a model considering slope situation (slope steepness), sand, organic matter content and root surface area density was reliable to estimate soil erodibility (CSEI). Our study suggested that the Armeniaca sibirica, the combination of Bothriochloa ischcemum and Robinia pseudoacacia and the combination of Armeniaca sibirica and Lespedeza bicolor can be used as the optimal selection for mitigating soil erodibility of loess-tableland, hill-slope and gully-slope, respectively. This study is of great significance in optimizing the spatial layout of soil and water conservation measures for different slope situations of the Loess Plateau. (C) 2021 Elsevier B.V. All rights reserved.
英文摘要:	Soil erodibility is an indispensable parameter for predicting soil erosion and evaluating the benefits of soil and water conservation. Slope situation can alter revegetation and its effects on soil properties and root traits, and thus may affect soil erodibility. However, whether slope situation will change the effect of revegetation on soil erodibility through improving soil properties and root traits has rarely been evaluated. Therefore, this study was conducted to detect the response of soil erodibility to slope situations (loess-tableland, hill-slope and gullyslope) in a typical watershed of the Loess Plateau. Five soil erodibility parameters (saturated soil hydraulicconductivity, SHe mean weight diameter of aggregates, MWD: clay ratio, CR: soil disintegration rate, SDR; soil erodibility factor, K) and a comprehensive soil erodibility index (CSEI) are selected to darify the study targets. The results revealed that soil properties, root traits, soil erodibility parameters and GE( were affected by slope situation significantly. Soil and root can explain 79.7%, 79.1% and 69.8% of total variance in soil erodibility of loess-tableland, hillslope and gully-slope, respectively. Slope situation influenced soil erodibility by changing the effects of revegetation on soil properties and root traits. Evidently, the slope situation greatly changed the relations between CSEI and soil and root parameters, whereafter a model considering slope situation (slope steepness), sand, organic matter content and root surface area density was reliable to estimate soil erodibility (CSEI). Our study suggested that the Armeniaca sibirica, the combination of Bothriochloa ischcemum and Robinia pseudoacacia and the combination of Armeniaca sibirica and Lespedeza bicolor can be used as the optimal selection for mitigating soil erodibility of loess-tableland, hill-slope and gully-slope, respectively. This study is of great significance in optimizing the spatial layout of soil and water conservation measures for different slope situations of the Loess Plateau. (C) 2021 Elsevier B.V. All rights reserved.
刊物名称:	Science of the Total Environment
英文刊物名称:	Science of the Total Environment
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参与作者:	M. M. Guo, Z. X. Chen, W. L. Wang, T. C. Wang, W. X. Wang and Z. Q. Cui
英文参与作者:	M. M. Guo, Z. X. Chen, W. L. Wang, T. C. Wang, W. X. Wang and Z. Q. Cui

Revegetation induced change in soil erodibility as influenced by slope situation on the Loess Platea

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