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Journal of Arid Land  2018, Vol. 10 Issue (3): 335-346    DOI: 10.1007/s40333-018-0007-0
Orginal Article     
Revegetation with artificial plants improves topsoil hydrological properties but intensifies deep-soil drying in northern Loess Plateau, China
Qingyin ZHANG1, Xiaoxu JIA2,3,*(), Chunlei ZHAO1, Ming'an SHAO1,2,3
1 State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling 712100, China;
2 Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
3 College of Resources and Environment, University of Chinese Academy of Sciences, Beijing 100190, China
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Abstract  

Knowledge about the effects of vegetation types on soil properties and on water dynamics in the soil profile is critical for revegetation strategies in water-scarce regions, especially the choice of vegetation type and human management measures. We focused on the analysis of the effects of vegetation type on soil hydrological properties and soil moisture variation in the 0-400 cm soil layer based on a long-term (2004―2016) experimental data in the northern Loess Plateau region, China. Soil bulk density (BD), saturated soil hydraulic conductivity (Ks), field capacity (FC) and soil organic carbon (SOC) in 2016, as well as the volumetric soil moisture content during 2004-2016, were measured in four vegetation types, i.e., shrubland (korshinsk peashrub), artificial grassland (alfalfa), fallow land and cropland (millet or potato). Compared with cropland, revegetation with peashrub and alfalfa significantly decreased BD and increased Ks, FC, and SOC in the 0-40 cm soil layer, and fallow land significantly increased FC and SOC in the 0-10 cm soil layer. Soil water storage (SWS) significantly declined in shrubland and grassland in the 40-400 cm soil layer, causing severe soil drought in the deep soil layers. The study suggested that converting cropland to grassland (alfalfa) and shrubland (peashrub) improved soil-hydrological properties, but worsened water conditions in the deep soil profile. However, natural restoration did not intensify deep-soil drying. The results imply that natural restoration could be better than revegetation with peashrub and alfalfa in terms of good soil hydrological processes in the semi-arid Loess Plateau region.



Key wordssoil drying      soil hydrological property      soil moisture      vegetation restoration      Loess Plateau     
Received: 31 October 2017      Published: 10 June 2018
Corresponding Authors:
Cite this article:

Qingyin ZHANG, Xiaoxu JIA, Chunlei ZHAO, Ming'an SHAO. Revegetation with artificial plants improves topsoil hydrological properties but intensifies deep-soil drying in northern Loess Plateau, China. Journal of Arid Land, 2018, 10(3): 335-346.

URL:

http://jal.xjegi.com/10.1007/s40333-018-0007-0     OR     http://jal.xjegi.com/Y2018/V10/I3/335

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