Changes in soil properties across a chronosequence of vegetation restoration on the Loess Plateau of China |
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Authors: | Feng Jiao Zhong-Ming Wen Shao-Shan An |
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Institution: | a Institute of Soil and Water Conservation, Northwest A&F University, Yangling, Shaanxi, 712100, China;b Institute of Soil and Water Conservation, Chinese Academy of Science and Ministry of Water Resource, Yangling, Shaanxi, 712100, China |
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Abstract: | Soil fertility is important for vegetation growth and productivity. The relationship between vegetation and soil fertility is important for both scientific and practical reasons. However, the effects of soil fertility on vegetation development and succession are poorly documented on the Loess Plateau. In this study, we compared soil properties of the Yanhe Watershed in northern Shaanxi across five different land uses (shrubland, farmland, natural grassland, woodland and artificial grassland) and a chronosequence of soils undergoing restoration for 5, 10, 15, 20, 25, 30, 35, 40 and 45 years. We found that revegetation had a positive effect on soil bulk density decrease, total porosity and capillary porosity increase in the surface soil layers but not in the subsurface layer. Additionally, soil organic matter, total nitrogen, available nitrogen and available potassium were greater at shrubland and woodland sites compared with other land uses. Total phosphorus and available phosphorus were greater at farmland sites. Results of the study indicate that revegetation on eroded soil can produce important increases in soil fertility on older plantations and in areas with natural succession. |
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Keywords: | Soil property Vegetation restoration Soil bulk density Soil organic carbon Land use Loess Plateau |
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