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Article

Soil Available Phosphorus Investigated for Spatial Distribution and Effect Indicators Resulting from Ecological Construction on the Loess Plateau, China

1
State Key Laboratory of Eco-Hydraulics in Northwest Arid Region, Xi’an University of Technology, Xi’an 710048, China
2
Key Laboratory of National Forestry Administration on Ecological Hydrology and Disaster Prevention in Arid Regions, Xi’an University of Technology, Xi’an 710048, China
3
College of Life Science, Yan’an University, Yan’an 716000, China
*
Author to whom correspondence should be addressed.
Sustainability 2021, 13(22), 12572; https://doi.org/10.3390/su132212572
Submission received: 16 October 2021 / Revised: 9 November 2021 / Accepted: 10 November 2021 / Published: 14 November 2021
(This article belongs to the Special Issue Soil Erosion and Water and Soil Conservation)

Abstract

Soil phosphorus is a major determinant and indicator of soil fertility and quality, and is also a source of nonpoint-source pollution. In order to control soil and water loss in the Loess Plateau, a series of soil and water conservation measures have been taken, resulting in changes in land use and differences in spatial distribution. It is necessary to study soil available phosphorus (SAP) to evaluate land productivity and environmental quality. In this study, the spatial distribution of SAP in different land uses was investigated in a small catchment area of Loess Plateau, and the field-influencing factors were determined on five layers with soil depth of 20 cm. The results show the minimum and maximum SAP content occurred at 20–40 cm and 80–100 cm soil depth and reach a value of 27.26 mg/kg and 29.37 mg/kg at catchment scale, respectively. There is significant difference among the SAP of the five soil layers (p < 0.01). The SAP of different land uses is, in order: forestland < slope farmland < dam farmland < terrace < grassland. Different land uses’ topographies make a difference to the spatial distribution of SAP. Slope and soil texture are the domain factors influencing the SAP concentration at the catchment.
Keywords: soil available phosphorus; land use change; vegetation restoration; check dam; terrace soil available phosphorus; land use change; vegetation restoration; check dam; terrace

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MDPI and ACS Style

Cheng, S.; Ke, G.; Li, Z.; Cheng, Y.; Wu, H. Soil Available Phosphorus Investigated for Spatial Distribution and Effect Indicators Resulting from Ecological Construction on the Loess Plateau, China. Sustainability 2021, 13, 12572. https://doi.org/10.3390/su132212572

AMA Style

Cheng S, Ke G, Li Z, Cheng Y, Wu H. Soil Available Phosphorus Investigated for Spatial Distribution and Effect Indicators Resulting from Ecological Construction on the Loess Plateau, China. Sustainability. 2021; 13(22):12572. https://doi.org/10.3390/su132212572

Chicago/Turabian Style

Cheng, Shengdong, Ganggang Ke, Zhanbin Li, Yuting Cheng, and Heng Wu. 2021. "Soil Available Phosphorus Investigated for Spatial Distribution and Effect Indicators Resulting from Ecological Construction on the Loess Plateau, China" Sustainability 13, no. 22: 12572. https://doi.org/10.3390/su132212572

APA Style

Cheng, S., Ke, G., Li, Z., Cheng, Y., & Wu, H. (2021). Soil Available Phosphorus Investigated for Spatial Distribution and Effect Indicators Resulting from Ecological Construction on the Loess Plateau, China. Sustainability, 13(22), 12572. https://doi.org/10.3390/su132212572

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