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Chinese Journal of Applied Ecology ›› 2024, Vol. 35 ›› Issue (1): 62-72.doi: 10.13287/j.1001-9332.202401.004

• Special Features of Eolian Sand Disaster Control in Semiarid Region • Previous Articles     Next Articles

Characteristics of vegetation and soil in Caragana korshinskii plantations in the hilly and sandy areas of northwestern Shanxi Province, China

WANG Guohua1,2*, WANG Jiaqi1, LIU Jing1   

  1. 1College of Geographical Sciences, Shanxi Normal University, Taiyuan 030000, China;
    2Linze Inland River Basin Research Station, Northwest Institute of Eco-Environment and Resources, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2023-08-01 Accepted:2023-11-22 Online:2024-01-18 Published:2024-03-21

Abstract: We investigated the changes of soil nutrients and plant communities in the artificial sand fixation forests of Caragana korshinskii with different ages. The results showed that soil organic carbon and soil total nitrogen contents increased with the stand ages, and were significantly higher in 40 and 50 year-old than other ages. Soil organic carbon and total nitrogen contents recovered much faster in the surface layer (0-10 cm) than in others. Soil nutrient stoichiometric ratios (C:P, N:P) in the 0-10 cm soil layer differed significantly among different stand ages. With the increases of stand age, C and N contents in C. korshinskii leaves increased significantly, and reached the maximum at 50 year-old. Leaf P content increased first and then decreased, being maximum at 18 year-old. Leaf C:N first increased and then decreased, being maximum at 12 year-old. The contents of photosynthetic pigments and leaf C:P and N:P decreased first and then increased, being minimum at 18 year-old. C. korshinskii was mainly influenced by N availability before 40 year-old, but mainly limited by P after. The species number, density, and vegetation cover of annual and perennial herbaceous plants increased with stand ages, and the community shifted from a simple shrub plant community to a complex shrub-herb community. The biomass of C. korshinskii and herbaceous plants increased significantly with stand age, and had a significant positive correlation with the contents of soil organic carbon, total nitrogen and N:P.

Key words: stoichiometric ratio, Caragana korshinskii, soil nutrient, vegetation succession