[1]MENG Meng,XU Yongyan.13C Traces the Dynamic Distribution Characteristics of Photosynthetic Carbon of Different Plants in Different Organ-Soil Systems[J].Research of Soil and Water Conservation,2021,28(01):331-336344.
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13C Traces the Dynamic Distribution Characteristics of Photosynthetic Carbon of Different Plants in Different Organ-Soil Systems
Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume:
28
Number of periods:
2021 01
Page number:
331-336344
Column:
Public date:
2021-01-10
- Title:
- 13C Traces the Dynamic Distribution Characteristics of Photosynthetic Carbon of Different Plants in Different Organ-Soil Systems
- Keywords:
- garden plants; soil organic carbon; photosynthetic carbon
- CLC:
- S718.5
- DOI:
- -
- Abstract:
- The natural abundance of stable carbon isotopes(13C), which records key information about the carbon cycling process of ecosystems, is often used to evaluate the carbon dynamics of terrestrial ecosystems under global change scenarios. In this study, 13C pulse marker was used to study the photosynthetic carbon distribution and its underground input characteristics of different garden plants, to explore the distribution of photosynthetic carbon in different organs of different garden plants and its contribution to soil organic carbon, which is of great significance to the understanding of carbon balance of urban ecosystem. The results showed that:(1)on the day of pulse marking, the 13C values of different garden plants all decreased in the order: leaves>stems>roots>soil, and privet of camphor tree>oleanthus magnolia, indicating that the roots of different garden plants had greater enrichment of new carbon of photosynthetic fixation;(2)on the day of marking, the fixed percentage of 13C on the ground of different garden plants was higher, indicating higher efficiency of marking and greater distribution difference; after pulse marking for 21 days, the 13C value decreased and the amount of fixed photosynthetic carbon transferred to the soil increased significantly;(3)after labeling, the proportion of fixed 13C in each component of plant-soil system in total net photosynthetic 13C decreased in the order: leaves>roots>soil, and photosynthetic carbon increased in different parts of garden plants and soil, mainly in the aboveground part;(4)camphor tree and oleander have the largest contribution to soil organic carbon, and the contribution to soil organic carbon decreased in the order: camphor tree>oleander>magnolia broadleaf>privet; the accumulation of organic carbon showed an opposite trend;(5)correlation analysis results showed that there was a significant positive correlation between root and aboveground biomass and 13C-SOC. Further analysis results showed that different garden plants significantly affected the distribution of photosynthetic carbon in the aboveground and soil, among which camphor and magnolia had significant responses in plant-soil system.
- References:
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Last Update:
2021-01-15