[1]Tuo Weiwei,Fan Jiawei,Zhou Yajie,et al.Evolutionary Relationship of Ecological Stoichiometric Characteristics Between Soil and Plant of Pinus sylvestris Forest in Mu Us Sandy Land[J].Research of Soil and Water Conservation,2023,30(06):177-186.[doi:10.13869/j.cnki.rswc.2023.06.047]
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Evolutionary Relationship of Ecological Stoichiometric Characteristics Between Soil and Plant of Pinus sylvestris Forest in Mu Us Sandy Land
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
30
Number of periods:
2023 06
Page number:
177-186
Column:
Public date:
2023-10-10
- Title:
- Evolutionary Relationship of Ecological Stoichiometric Characteristics Between Soil and Plant of Pinus sylvestris Forest in Mu Us Sandy Land
- Keywords:
- Pinus sylvestris var. mongolica Litv; Vegetation restoration; Eco stoichiometry; Mu Us sandy land
- CLC:
- S791.253
- DOI:
- 10.13869/j.cnki.rswc.2023.06.047
- Abstract:
- [Objective] Explore the evolving relationship between the chemical stoichiometry of carbon(C), nitrogen(N), and phosphorus(P)in plants and soil during the process of vegetation restoration on desertified land, and gain a deeper understanding of the vegetation restoration mechanism of Pinus sylvestris fixed sand forest. [Methods] This study compared the semi-fixed sand land in the Mu Us sandy land in Yulin as a control, and the species diversity, as well as the dynamic changes and interactive effects of C, N, and P contents and its stoichiometry in the vegetation(leaves, litter, fine roots)and soil was analyzed under 25～56-year-old Pinus sylvestris var. mongolica plantation during the restoration process. [Results](1)The average content of C, N, and P in the plant tissues of Pinus sylvestris is expressed as follows: leaves>litter>fine roots. The stoichiometric ratio among C, N and P was as follows: litter>fine roots>leaves.(2)Compared with the semi-fixed sand land, significant changes in the content of carbon(C), nitrogen(N), and phosphorus(P)were observed in the plant tissues and soil of Pinus sylvestris after vegetation restoration. From the 25 yeas to the 56 yeas of restoration, the content of C in litter and soil significantly increased by 14.9% and 61.5%, respectively, while N content increased significantly by 55.0% and 52.4%, respectively.(3)As the restoration time increases, the C:N ratios of litter and fine roots, as well as the C:P and N:P in leaf and fine root, all showed significant decreases. Meanwhile, the leaf C:N ratio and the litter C:P and N:P ratios exhibited significant increases.(4)There was a significant positive correlation between the C content in litter and soil, the content of N and P in fine roots and soil, and the C:P ratios between plant tissues and soil.(5)The restoration time of vegetation has the greatest total effect on the content of C, N and P in the soil by indirectly affecting the biomass of litter and the root mass of undergrowth vegetation. [Conclusion] The increase in soil C content during vegetation restoration in the Pinus sylvestris forest of Yulin sandy area was closely related to the input of litter. The increase in soil N and P content was mainly related to the nutrient uptake of fine roots. The C:P ratio is a key stoichiometric ratio that affected the nutrient exchange between plants and soil in Pinus sylvestris forests.
- References:
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Last Update:
2023-10-10