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Chinese Agricultural Science Bulletin ›› 2020, Vol. 36 ›› Issue (25): 86-94.doi: 10.11924/j.issn.1000-6850.casb20190800582

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Effects of Vegetation Restoration on Soil Physicochemical Properties in the Loess Plateau of Northern Shaanxi

Zhao Manxing1,2(), Yu Guangmei1, Bai Erlei1, Liu Hui1, Cao Yangyang1   

  1. 1College of Life Sciences, Yan’an University, Yan’an Shaanxi 716000
    2Shaanxi Engineering and Technological Research Center for Conversation and Utilization of Regional Biological Resources, Yan’an Shaanxi 716000
  • Received:2019-08-29 Revised:2019-11-17 Online:2020-09-05 Published:2020-08-18

Abstract:

To study the influence of different types of vegetation restoration on soil physicochemical properties and the properties’ seasonal change in the Loess Plateau of northern Shaanxi, we used the method of completely random design, took 19-year old Prunus armeniaca forest, Hipophae rhamnoides forest, Pinus tabuliformis and Robinia pseudoacacia forest as the research objects and the cultivated land as the control, to analyze the effects of vegetation restoration types, seasons, soil depth on soil organic matter, available N, available P, available K, pH and electric conductivity. The results showed that soil organic matter, available P and available K had significant difference among different vegetation types. The content of soil nutrients of artificial forest was higher than that of corn field, higher in Prunus armeniaca forest and Hipophae rhamnoides forest, lower in Pinus tabuliformis and Robinia pseudoacacia forest. Under different vegetation types, the soil nutrients significantly decreased with the increase of soil depth. Soil organic matter, available N, available K and electric conductivity were the highest in spring and summer. Available P and pH were the highest in autumn and winter. There was a positive correlation between soil organic matter and available N and available K in 0-20 cm soil depth, a positive correlation between soil organic matter and electric conductivity and a negative correlation between available P and available K in 20-40 cm soil depth. In 0-40 cm soil depth, there was a positive correlation between available K and electric conductivity, and a negative correlation between pH and electric conductivity. In conclusion, vegetation restoration could effectively improve soil nutrient, and the soil nutrients’ content is high in Prunus armeniaca forest and Hipophae rhamnoides forest.

Key words: Loess Plateau, vegetation restoration, artificial forest, soil physicochemical properties, northern Shaanxi

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