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: 3

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 - 09 - 07
Application of Resonon Pika L Hyperspectral Imaging on the estimation of amino acid contents in maize leavesMaize is one of the most important crops in the world. In maize growth, nitrogen (N) is one of the most important nutrient elements. The nitrogen translocation in maize leaves was mainly in the form of glutamine. The maize yield is correlated well with the amino acids in leaves, such as glut...
2022 - 09 - 01
Retrieval of Suspended Sediment Concentrations in the Pearl River Estuary Using Multi-Source Satellite ImageryMonitoring and quantifying suspended sediment concentrations (SSC) in estuaries such as the Pearl River Estuary (PRE) provide crucial information for environmental processes, hydrological infrastructure, and navigation. Traditional SSC mapping based on in situ investigations lacks the spat...
2022 - 08 - 12
Based on the World Meteorological Organization (WMO) data, the global average mole fraction of atmospheric CO2 was 405.5 ± 0.1 parts per million (ppm) as of 2018, which was 146% of the pre-industrial (before 1750) level (WMO, 2018). To mitigate climate change, China is striving to reduce its carbon dioxide (CO2) emissions before 2030 and has derived a series of national environmental policies...
2022 - 08 - 04
Hyperspectral remote sensing to assess weed competitiveness in maize farmland ecosystemsWeeds are plants that crowd out maize crops, which affect the normal growth of maize by competing for nutrients, sunlight, space, and water. However, maintaining appropriate weed diversity has ecological functions such as controlling agricultural pests, maintaining soil, and promoting nutrient cycling. To bette...
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