Abiotic and biotic regulation on carbon mineralization and stabilization in paddy soils along iron oxide gradients

2021 ◽  
pp. 108312
Author(s):  
Peduruhewa H. Jeewani ◽  
Lukas Van Zwieten ◽  
Zhenke Zhu ◽  
Tida Ge ◽  
Georg Guggenberger ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Carbon Mineralization ◽  
Paddy Soils

Immobilization and release risk of arsenic associated with partitioning and reactivity of iron oxide minerals in paddy soils

2020 ◽  
Vol 27 (29) ◽  
pp. 36377-36390 ◽  
Author(s):  
Xiaoxue Ouyang ◽  
Jie Ma ◽  
Liping Weng ◽  
Yali Chen ◽  
Rongfei Wei ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Paddy Soils ◽  
Oxide Minerals

Redox control on carbon mineralization and dissolved organic matter along a chronosequence of paddy soils

2013 ◽  
Vol 64 (4) ◽  
pp. 476-487 ◽  
Author(s):  
A. Hanke ◽  
C. Cerli ◽  
J. Muhr ◽  
W. Borken ◽  
K. Kalbitz
Keyword(s):  
Organic Matter ◽  
Dissolved Organic Matter ◽  
Carbon Mineralization ◽  
Paddy Soils ◽  
Redox Control

Mössbauer study on the iron oxide minerals of paddy soils derived from red soil in Fujian, China

1992 ◽  
Vol 70 (1-4) ◽  
pp. 1037-1040 ◽  
Author(s):  
Youtong Wang ◽  
Xingduan Zhou ◽  
Jinjian Wu
Keyword(s):  
Iron Oxide ◽  
Red Soil ◽  
Paddy Soils ◽  
Mössbauer Study ◽  
Oxide Minerals

scholarly journals The effect of dolomite amendment on soil organic carbon mineralization is determined by the dolomite size

2021 ◽  
Vol 10 (1) ◽  
Author(s):  
Hongtao Wu ◽  
Jinli Hu ◽  
Muhammad Shaaban ◽  
Peng Xu ◽  
Jinsong Zhao ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Soil Organic Carbon ◽  
Soil Ph ◽  
Microbial Biomass Carbon ◽  
Carbon Mineralization ◽  
Paddy Soils ◽  
Decomposition Rate Constant ◽  
Particle Size Fractions ◽  
Key Factor ◽  
Soc Mineralization

Abstract Background The size of lime material is vital for the efficiency of ameliorating soil acidity, thereby influencing soil biochemical processes. However, the effects of different sized lime material application on soil organic carbon (SOC) mineralization are yet to be elucidated. Therefore, a 35-day incubation experiment was conducted to determine the effects of three particle size fractions (0.5 to 0.25, 0.25 to 0.15, and < 0.15 mm) of dolomite on SOC mineralization of two acidic paddy soils. Results CO2 emission was increased by 3–7%, 11–21%, and 32–49% for coarse-, medium-, and fine-sized dolomite treatments, respectively, compared to the control in both soils. They also well conformed to a first-order model in all treatments, and the estimated decomposition rate constant was significantly higher in the fine-sized treatment than that of other treatments (P < 0.05), indicating that SOC turnover rate was dependent on the dolomite size. The finer particle sizes were characterized with higher efficiencies of modifying soil pH, consequently resulting in higher dissolved organic carbon contents and microbial biomass carbon, eventually leading to higher CO2 emissions. Conclusions The results demonstrate that the size of dolomite is a key factor in regulating SOC mineralization in acidic paddy soils when dolomite is applied to manipulate soil pH.

scholarly journals Effective Amendments on Cadmium, Arsenic, Chromium and Lead Contaminated Paddy Soil for Rice Safety

Agronomy ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 359
Author(s):  
Aman Ullah ◽  
Yibing Ma ◽  
Jumei Li ◽  
Nazia Tahir ◽  
Babar Hussain
Keyword(s):  
Heavy Metals ◽  
Iron Oxide ◽  
Soil Amendments ◽  
Cost Effective ◽  
Paddy Soils ◽  
In Situ Remediation ◽  
Metals And Metalloids ◽  
Rice Plants ◽  
Heavy Metals And Metalloids

Contamination of paddy soils with heavy metals and metalloids poses a risk to human health through the food chain. For safe agricultural production in contaminated paddy soils, “in situ” remediation through the unavailability of heavy metals from contaminated soils was investigated in order to develop cost-effective and eco-friendly approaches for soils contaminated with complexed heavy metals (HMs) and metalloids. In the present study, the effectiveness of different soil amendments, including sulfur-containing materials (hair or cysteine), manganese compounds as an antagonist and an oxidant, zeolite and iron oxide as adsorbents, and their combinations through coating or modification, was investigated by a pot experiment with rice plants and chemical analysis. Two levels of each treatment were made, termed X1 and X2, which were a single and double dose of each treatment respectively, while CaCO3 was used as a basal and pH enhancement amendment in all treatments to identify the best combination of the above treatments in the in situ remediation of heavy metals and metalloids. The rice plants were kept under the flooded condition. Results indicated that the bioavailability of As, Cd, Cr, and Pb in soil was significantly decreased with level two (X2) of iron oxide coated with modified hairs (T7X2) followed by level two (X2) of zeolite coated with KMnO4. The iron oxide coated with modified hairs (X2) decreased the concentrations of heavy metals and metalloids in rice plants in the order Pb ˃ As ˃ Cr ˃ Cd by 81%, 80%, 79% and 46%, respectively, followed by zeolite coated with KMnO4 (X2) in the order Pb ˃ As ˃ Cr ˃ Cd by 78%, 76%, 71%, and 31%, respectively, to control. The available content of these elements in soil was decreased in the order As > Cr> Pb > Cd by 67%, 66%, 64% and 60%, respectively, through iron oxide coated with modified hairs, followed by zeolite coated with KMnO4 in the order Pb ˃ Cr ˃ Cd ˃ As by 57%, 53%, 50%, and 46%, respectively, to control, which can explain the decreased bioavailability by these amendments. In addition, the maximum shoot dry and leaf area were noticed in the pots treated with iron oxide coated with modified hairs and zeolite coated with KMnO4. There is potential to use modified hairs (MHs) with iron oxide and KMnO4-coated zeolite as soil amendments to develop a cost-effective and efficient “in situ” remediation technology for As, Cd, Pb, and Cr-contaminated rice paddy soils, especially for the soils with complex contamination by Cd and As.

Organic carbon mineralization responses to temperature increases in subtropical paddy soils

2013 ◽  
Vol 14 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Ping Zhou ◽  
Yong Li ◽  
Xiu’e Ren ◽  
He’ai Xiao ◽  
Chengli Tong ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Carbon Mineralization ◽  
Paddy Soils ◽  
Organic Carbon Mineralization
Sign in / Sign up

Export Citation Format

Share Document