Beijing LICA United Technology Limited

Novel Instruments Provide New Opportunities

Hotline: 010-51292601
Technical Technical
News Technical

ABB LGR | Soil properties and substrate quality determine the priming of soil organic carbon during

Date: 2022-05-06
浏览次数: 7

Soil properties and substrate quality determine the priming of soil organic carbon during vegetation succession

Soil organic matter (SOM), the largest carbon (C) pool in terrestrial ecosystems, is extremely vulnerable to climate and human disturbances. Even a small change in SOM can greatly influence atmosphere CO2 concentration and C balance. Fresh organic matter (FOM), e.g., leaf litter and root exudate, contributes considerably to SOM formation, but can also modify SOC mineralization through the priming effect (PE). While many studies have shown that plant derived C entering the soil would increase with vegetation succession, the amount of soil C loss caused by PE remains unclear during succession, which causes great uncertainty in the prediction of SOC change throughout this process. Therefore, understanding the underlying mechanisms of PE is urgently needed. In fact, the development of vegetation succession is usually accompanied by changes in soil properties like nutrient availability, aggregate stability, pH, and microbial communities. But, how changes in these properties interact with extraneous FOM to regulate PE, which would further affect SOC dynamics, remains unknown.

Based on this, to fill research gap, a group of Chinese scientists conducted a field investigation in the Foping National Nature Reserve (33°33-33°46N, 107°40-107°55, 10751301 m a.s.l) in the south aspect of the Qinling Mountains, China (Fig.1a) to examine the pattern of SOC stock along with secondary succession ecosystems (croplandshrublandforest); then, using a laboratory incubation experiment, they explored the mechanism underlying SOC patterns with regard to PE. Specifically, they evaluated the patterns of PEs induced by 13C-labeled glucose (GLU) as well as LOM and ROM extracted from 13C-labeled maize leaf. Aiming to answer the following questions: (1) How would FOMs with different quality affect soil C mineralization by PE across vegetation succession? And (2) What are the driving factors in regulating PE among succession stages?


LGR | Soil properties and substrate quality determine the priming of soil organic carbon during

Fig.1 The location of study area (a) and the representative plots for each succession stage (b).

13C measurement]: During incubation experiment, the authors collected gas samples from the flasks on days 1, 4, 7, 14, 27 and 43. As the fluxes of CO2 from substrate treated soils were low and had no significant differences with CK soil after the sixth sampling, the incubation was stopped at day 43. Then, they measured the CO2 concentration. To measure the δ13C of the gas sample, they flushed the headspace gas out of the flasks using CO2-free air into pre-evacuated gas sampling bags. The δ13C of the gas samples were measured with a CO2 Isotope Analyzer (912–0003, LGR, America).


LGR | Soil properties and substrate quality determine the priming of soil organic carbon during

Cumulative priming effect (PE) from different C substrate treatments, succession stages, and soil depths at the end of the incubation.


LGR | Soil properties and substrate quality determine the priming of soil organic carbon during

Linear regressions for testing the relationships between priming effect and soil properties for each substrate treatment and soil depth.


LGR | Soil properties and substrate quality determine the priming of soil organic carbon during

Structural equation modeling for examining the direct and indirect effects of soil properties on priming effect (PE) among succession stages.

LGR | Soil properties and substrate quality determine the priming of soil organic carbon during  

Conceptual diagram illustrating the priming effect (PE) on soils along the secondary succession ecosystems.


The authors concluded that the magnitude of PE depended not only on the added substrate type but also on soil types specifically associated with vegetation succession. FOM quality contributed to the PE differently. Specifically, GLU and LOM generally induced a higher PE than ROM by increasing the abundance of GN in soil. In contrast, ROM caused PE in soil by increasing the abundance of fungi. These results suggest that GLU, LOM, and ROM may induce PE through different mechanisms. In addition, after FOM addition, soils from the croplands exhibited higher PEs than those from the shrublands and forests. The differences in PE between the succession stages negatively correlated with MWD, TIN, and AP but positively correlated with soil pH and F/B. The results indicate soil properties and substrate quality determine the PE in soils from consecutive vegetation succession stages. PE might be one of the mechanisms underlying distinct soil C dynamics during the process of vegetation succession.

News / Related News More
2022 - 12 - 30
Cherry tomato (Solanum lycopersicum) is popular with consumers over the world due to its special flavor. Soluble solids content (SSC) and firmness are two key metrics for evaluating the product qualities. The existing measuring techniques relying upon chemistry reactions can derive the SSC value accurately. However, the destructive methods can not be applied in high volume measurements. Moreover, ...
2022 - 12 - 28
In the Arctic, the air temperature has increased more than twice the global average during the last few decades and may increase by 2-8°C before 2100. Wildfire frequency and expanse in the Arctic have increased in recent years. It can markedly disturb tundra ecosystems in different ways, including above-and belowground plant biomass destruction and alter soil properties through changes in the...
2022 - 12 - 06
Heavy metals in soil are harmful, and their migration and accumulation can seriously threaten ecological environmental security and human health. Arsenic (As) exhibits high neurotoxicity and teratogenicity. Much As is released into soil during human activities, including mining operations and industrial production activities. Determining the As concentration in soil quickly and accurately is impor...
2022 - 11 - 30
The pine wood nematode (Bursaphelenchus xylophilus) is a dangerous invasive species that causes pine wilt disease (PWD), which has already destroyed enormous areas of pine forest in China. Therefore, early-stage PWD detection is crucial for a prompt management response. Hyperspectral RS uses data from hundreds of bands and continuous wavelengths, and these bands can capture physiological changes i...
Close window】【Print
Copyright ©2018-2023 LICA United Technology Limited

LICA United Technology Limited

Address:The 5th.Building,No.18,Anningzhuang East Road,Haidian District, 100085, Beijing, China.





  • Name:
  • *
  • 公司名称:
  • *
  • 地址:
  • *
  • 电话:
  • *
  • 传真:
  • *
  • E-mail:
  • *
  • 邮政编码:
  • *
  • 留言主题:
  • *
  • Details:
  • *
Follow us
  • Wechat
  • Mobile Website