scholarly journals Vertical Distribution and Controlling Factors of Soil Inorganic Carbon in Poplar Plantations of Coastal Eastern China

Forests ◽  
2022 ◽  
Vol 13 (1) ◽  
pp. 83
Author(s):  
Sihan Wang ◽  
Weiwei Lu ◽  
Fangchao Zhang

Afforestation is a strategy to protect croplands and to sequestrate carbon in coastal areas. In addition, inorganic carbon is a considerable constitute of the coastal soil carbon pool. However, the vertical distribution and controlling factors of soil inorganic carbon (SIC) in plantations of coastal areas have been rarely studied. We analyzed the SIC content as well as physiochemical properties along soil profiles (0–100 cm) in young (YP) and mature (MP) poplar plantations in coastal eastern China. The soil profile was divided into six layers (0–10, 11–20, 21–40, 41–60, 61–80 and 81–100 cm) and a total of 36 soil samples were formed. The SIC content first increased from 0–10 cm (0.74%) to 11–20 cm (0.92%) and then fluctuated in the YP. In contrast, the SIC content increased with increasing soil depth until 40 cm and then leveled off, and the minimum and maximum appeared at 0–10 cm (0.54%) and 81–100 cm (0.98%) respectively in the MP. The soil inorganic carbon density was 12.05 and 12.93 kg m−2 within 0–100 cm in the YP and MP, respectively. Contrary to SIC, soil organic carbon (SOC) first decreased then levelled off within the soil profiles. Compared with the YP, the SIC content decreased 27.8% at 0–10 cm but increased 13.2% at 21–40 cm, meanwhile the SOC content in MP decreased 70.6% and 46.7% at 21–40 cm and 61–80 cm, respectively. The water-soluble Ca2+ and Mg2+ gradually decreased and increased, respectively within the soil profiles. The soil water-soluble Ca2+ increased 18.3% within 41–100 cm; however, the soil water-soluble Mg2+ decreased 32.7% within 21–100 cm in the MP when compared to the YP. Correlation analysis showed that SIC was negatively correlated with SOC, but positively correlated with soil pH and water-soluble Mg2+. Furthermore, structural equation modeling (SEM) indicated that SOC was the most important factor influencing the SIC content in the studied poplar plantations, indicating SOC sequestration promoted the dissolution of SIC. Therefore, our study highlights the trade-off between SIC and SOC in poplar plantations of coastal Eastern China.

CATENA ◽  
2020 ◽  
Vol 185 ◽  
pp. 104302 ◽  
Author(s):  
Mengyang You ◽  
Xiaozeng Han ◽  
Ning Hu ◽  
Shuli Du ◽  
Timothy A. Doane ◽  
...  

Soil Research ◽  
2016 ◽  
Vol 54 (7) ◽  
pp. 777 ◽  
Author(s):  
Gabriela Civeira

Changes in contents of soil organic carbon and soil inorganic carbon (SOC and SIC, respectively) could have a great effect on the global carbon balance. Quantifying SIC at regional level is essential in climate change models. The spatial distribution of SIC depends on climate, soil particle size, soil type, landscape position and SOC fraction, among other factors. This study compared the SIC storage in soil profiles at different depths in different soil great groups and landscape positions in Buenos Aires province, Argentina. The objectives were to: (i) quantify SIC content and distribution in the soil profile (depths of 0–20, 20–100 and 0–100 cm) for different soil types and landscape positions; (ii) identify relationships between the distribution of SIC and edaphic properties; and (iii) analyse the relationship between SIC and SOC in soils of the area. The analysis was based on 150 soil profiles of Argiudolls, Hapludolls, Natraquolls and Haplustolls from Buenos Aires province. The data on SIC were expressed by soil great group, landscape position (summit, shoulder slope and toe slope) and depth in the soil profile (0–20, 20–100 and 0–100 cm). In the whole profile (0–100 cm) the order of decrease for SIC was Haplustolls > Hapludolls > Natraquolls > Argiudolls. Concentrations of SIC for landscape positions were shoulder slope > toe slope > summit. pH was positively correlated with SIC content within the 100-cm soil depth and in the AC horizon in Haplustolls (P < 0.05), and with SIC content in the C horizons in Hapludolls and Haplustolls. Silt was positively correlated with SIC in Haplustolls. There were changes in the contents of SIC due to increased SOC. Landscape position and great group determined the distribution of SIC in these Pampean agroecosystems. These results may be useful to predict SIC responses to land use change at local and regional levels.


2019 ◽  
Vol 186 ◽  
pp. 36-41 ◽  
Author(s):  
Xinliang Dong ◽  
Bhupinder Pal Singh ◽  
Guitong Li ◽  
Qimei Lin ◽  
Xiaorong Zhao

Geoderma ◽  
2019 ◽  
Vol 353 ◽  
pp. 273-282 ◽  
Author(s):  
Hui An ◽  
Xiuzhi Wu ◽  
Yarou Zhang ◽  
Zhuangsheng Tang

CATENA ◽  
2014 ◽  
Vol 121 ◽  
pp. 22-30 ◽  
Author(s):  
Wen-Feng Tan ◽  
Rui Zhang ◽  
Hua Cao ◽  
Chuan-Qin Huang ◽  
Qin-Ke Yang ◽  
...  

2010 ◽  
Vol 24 (4) ◽  
pp. n/a-n/a ◽  
Author(s):  
Yuanhe Yang ◽  
Jingyun Fang ◽  
Chengjun Ji ◽  
Wenhong Ma ◽  
Shenshen Su ◽  
...  

2017 ◽  
Vol 418 (1-2) ◽  
pp. 423-436 ◽  
Author(s):  
H. J. Shi ◽  
X. J. Wang ◽  
Y. J. Zhao ◽  
M. G. Xu ◽  
D. W. Li ◽  
...  

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