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Journal of Desert Research ›› 2022, Vol. 42 ›› Issue (5): 232-244.DOI: 10.7522/j.issn.1000-694X.2022.00108

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Characteristics of soil nutrients and grain size around Badain Jaran Desert

Meng Wang1(), Junfeng Lu2(), Peng Fu1, Zhibao Dong3   

  1. 1.Xuchang University,Xuchang 461000,Henan,China
    2.Key Laboratory of Desert and Desertification,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou 730000,China
    3.Shaanxi Normal University,Xi'an 710062,China
  • Received:2022-08-13 Revised:2022-09-09 Online:2022-09-20 Published:2022-09-22
  • Contact: Junfeng Lu

Abstract:

Through field investigation in the marginal zone of the Badain Jaran Desert, soil samples of 0-20 cm and 20-40 cm in 8 study areas were collected to analyze the characteristics of soil nutrients and grain size at different depths and regional differences in this paper. The results showed that: (1) The soil nutrients and grain size around Badain Jaran Desert show spatial variability. The soil is poor, and the content of TK is at a medium level. The CV of EC is the largest, and pH variability is weak, and other factors belong to medium variation level. The content of fine sand particles is the highest in the study area. In 0-20 cm layer, the CV of clay and very coarse sand is high. The CV of clay, silty sand and very coarse sand is strong in the 20-40 cm layer. (2) In 0-20 cm layer, there are significant regional differences in TN, TP, AP, AK, EC and all particle sizes. In the 20-40 cm layer, the regional differences of TP, AK and very fine sand, medium sand, coarse sand are significant. (3)In 0-20 cm and 20-40 cm layers, the matters smaller than fine sand particles are generally positively correlated with nutrient content, while the matters larger than fine sand particles are generally negatively correlated with nutrient content.

Key words: soil nutrients, soil grain size, regional differences, Badain Jaran Desert

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