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Soil C, N, P and Its Stratification Ratio Affected by Artificial Vegetation in Subsoil, Loess Plateau China

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  • Jian Deng
  • Pingsheng Sun
  • Fazhu Zhao
  • Xinhui Han
  • Gaihe Yang
  • Yongzhong Feng
  • Guangxin Ren

Abstract

Artificial vegetation restoration can induce variations in accumulation and distribution of soil carbon (C), nitrogen (N) and phosphorus (P). However, little is known about variations in soil C, N and P nutrient fraction stratification following artificial vegetation in Loess Plateau China. Based on the hypothesis that re-vegetated can improve soil quality and stratification ratios (SR) can be used as an indicator to evaluate soil quality. This study measured contents and storages of soil organic carbon (SOC), total nitrogen (TN), total phosphorus (TP) and their SRs in topsoil (0–20 cm) and subsoil (20–60 cm) in three 30-year re-vegetated lands that had been converted from arable land (Robinia pseudoacacia L., Caragana Korshinskii Kom. and abandoned cropland with low interferences and few management measures) and one slope cropland (SC) as a control for three soil profiles(0–20 cm, 20–40 cm and 40–60 cm) from June 2009 to June 2013. The results showed that the contents and storages of SOC, TN and TP in re-vegetated land were significantly higher than those in the SC in both topsoil and subsoil. The storages of SOC, TN and TP in the topsoil (0–20 cm) of the re-vegetated lands increased by 16.2%-26.4%, 12.7%-28.4% and 16.5%-20.9%, respectively, and increased by smaller but significant amounts in subsoil from 2009 to 2013. The SRs for SOC, TN and TP in the re-vegetated lands were mostly >2 (either for 0–20:20–40 cm or 0–20:40–60 cm) and greater than that in the SC. The SRs showed an increasing trend with increasing restoration age. The results also showed that the land use type and soil depth were the most influential factors for the SRs and storages, and the SRs of SOC and TN had significantly positive correlations with their storages. The SRs were concluded to be a good indicator for evaluating the soil quality, which can be significantly enhanced through vegetation restoration. Moreover, vegetation restoration can significantly enhance SOC, TN and TP accumulation in both topsoil and subsoil.

Suggested Citation

  • Jian Deng & Pingsheng Sun & Fazhu Zhao & Xinhui Han & Gaihe Yang & Yongzhong Feng & Guangxin Ren, 2016. "Soil C, N, P and Its Stratification Ratio Affected by Artificial Vegetation in Subsoil, Loess Plateau China," PLOS ONE, Public Library of Science, vol. 11(3), pages 1-18, March.
    • Handle: RePEc:plo:pone00:0151446
    DOI: 10.1371/journal.pone.0151446
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    References listed on IDEAS

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    1. Wang, Yu & Liu, Xingliang & Min, Anmin & Wang, Li & Ma, Wenbao & Pan, Hongli & Li, Hongxia & Zhang, Li, 2014. "A Study of the Artificial Vegetation Restoration Technology in the Wenchuan Earthquake Area," Asian Agricultural Research, USA-China Science and Culture Media Corporation, vol. 6(09), pages 1-5, September.
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    Cited by:

    1. Pujia Yu & Xuguang Tang & Shiwei Liu & Wenxin Liu & Aichun Zhang, 2020. "Short Term Effects of Revegetation on Labile Carbon and Available Nutrients of Sodic Soils in Northeast China," Land, MDPI, vol. 9(1), pages 1-14, January.
    2. Jian Deng & Wenhui Hao & Wei Zhang & Xinhui Han & Kaiyuan Li & Yongzhong Feng & Gaihe Yang, 2017. "Exploring Farmers’ Pro-Ecological Intentions after Ecological Rehabilitation in a Fragile Environment Area: A Structural Equation Modeling Approach," Sustainability, MDPI, vol. 10(1), pages 1-15, December.

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