[1]ZHOU Ping,ZHUANG Wenhua,ZHANG Dan,et al.Characteristics of Stoichiometry of Astragalus mahoschanicus on Primary Succession Stages in Glacier Forehead[J].Research of Soil and Water Conservation,2021,28(06):81-89.
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Characteristics of Stoichiometry of Astragalus mahoschanicus on Primary Succession Stages in Glacier Forehead
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 06
Page number:
81-89
Column:
Public date:
2021-10-10
- Title:
- Characteristics of Stoichiometry of Astragalus mahoschanicus on Primary Succession Stages in Glacier Forehead
- Keywords:
- glacier forehead; primary succession stages; stoichiometry
- CLC:
- Q948.1; S153.6
- DOI:
- -
- Abstract:
- In order to clarify the relation between the characteristics of organic carbon，total nitrate，total phosphorus and its stoichiometry of the key species on primary succession stages and the process of the vegetation succession，the method of replacing time with space was used to investigate the characteristics of organic carbon，total nitrate，total phosphorus and its stoichiometry of Astragalus mahoschanicus on primary succession stages in the Hailuogou Glacier Forehead. The results showed that the organic carbon of litter，roots and different organs of Astragalus mahoschanicus decreased in the order: root>stem>litter>leaf，the total nitrogen decreased in the order: leaf>root>litter>stem，total phosphorus decreased in the order: leaf>litter>root>stem，the index of C/N decreased in the order: stem>litter>root>leaf，index of C/P decreased in the order: stem>root>litter>leaf，index of N/P decreased in the order: root>leaf>litter>stem，indicating that the stoichiometry of aboveground and underground of Astragalus mahoschanicus changed synchronized，and the growth rate of Astragalus mahoschanicus was limited by the phosphorus; the values of C/N of the soils ranged from 27.73 to 30.63，the values of N/P of the soils ranged from 0.42 to 0.49 and the values of C/P of the soils range from 11.90 to 13.42; the significant positive correlation between organic carbon and total nitrogen，organic carbon and total phosphorus，N/P and C/P of the litter of Astragalus mahoschanicus(p<0.05)was found; the significant negative correlation between total phosphorus and C/N of the litter of Astragalus mahoschanicus(p<0.05)was observed; meanwhile，the significant positive correlation between total phosphorus and C/N(p<0.05)，total nitrogen and soil C/P(p<0.01)of Astragalus mahoschanicus(p<0.05)was found; the significant negative correlation between soil organic carbon and total nitrogen，soil organic carbon and soil C/P(p<0.01)，soil C/N and N/P of Astragalus mahoschanicus(p<0.01)was observed，Astragalus mahoschanicus was considered as the key species on primary succession stages in the Hailuogou Glacier Forehead because of the lower carbon comsumption and higher nitrogen fixation，which could better adapt to the micro-ecological habitat and trigger the conditions of the primary succession in the Hailuogou Glacier Forehead.
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Last Update:
2021-10-10