Biochar and Sediment Amendments Alter Soil Nitrogen Mineralization: Microbial Biomass and Extracellular Enzyme Activity.
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| Title: | Biochar and Sediment Amendments Alter Soil Nitrogen Mineralization: Microbial Biomass and Extracellular Enzyme Activity. |
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| Authors: | Ahmed, Waqas1,2 (AUTHOR), Wang, Yunting3 (AUTHOR), Mehmood, Sajid1,2,4 (AUTHOR), Ali, Sehrish2 (AUTHOR), Qin, Fengyue1,2 (AUTHOR), Tan, Lun5 (AUTHOR), Li, Weidong1,2 (AUTHOR) weidongli@hainanu.edu.cn, Alam, Md Ashraful6 (AUTHOR) ashraful_bd22@yahoo.com |
| Source: | GCB Bioenergy. Jul2026, Vol. 18 Issue 7, p1-12. 12p. |
| Subject Terms: | *Biochar, *Nitrogen in soils, *Soil conditioners, *Soil microbial ecology, *Extracellular enzymes, *Soil fertility, *Nitrogen cycle |
| Abstract: | This study investigates the effects of biochar and sediment amendments, particularly Mn‐modified biochar (Mn‐BC), on soil nutrient dynamics, microbial activity, and nitrogen (N) mineralization. Sediments were collected from a fishpond in San Jiang, Hainan Province, and biochar was produced from bamboo and modified with manganese (Mn) to enhance its properties. A 90‐day incubation experiment was conducted with six treatments: control (T1), sediment alone (T2), soil with 10% sediment (T3), soil with 3% biochar (T4), sediment with 3% biochar (T5), and soil with 10% sediment and 3% biochar (T6). Results showed that biochar and sediment amendments significantly increased soil pH, organic carbon content (SOC), and microbial biomass carbon (SMBC) and nitrogen (SMBN) with T6 exhibiting the highest increases in pH (9.51) and SOC (7.82 g kg−1), compared to the control (5.51 pH and 5.58 g kg−1 SOC). SMBC and SMBN were also significantly higher in T6, with increases of 37.32% and 76.11%, respectively. Additionally, N‐acquiring enzyme activities, particularly N‐acetylglucosaminidase (NAG) and leucine aminopeptidase (LAP), were enhanced in the biochar‐sediment treated soils, with T6 showing a remarkable increase compared to the control. N mineralization was significantly improved by the amendments, with T6 showing a 60.84% increase in total mineralized nitrogen. The N mineralization potential (No) in T6 was 61.87 mg kg−1, compared to 39.20 mg kg−1 in the control, and the mineralization rate constant (k) was highest in T6 (0.22 d−1). These results highlight the potential of Mn‐modified biochar and sediment as sustainable soil amendments that improve soil fertility, microbial activity, nitrogen cycling, and overall soil health in agricultural systems. [ABSTRACT FROM AUTHOR] |
| Database: | Energy & Power Source |
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| Abstract: | This study investigates the effects of biochar and sediment amendments, particularly Mn‐modified biochar (Mn‐BC), on soil nutrient dynamics, microbial activity, and nitrogen (N) mineralization. Sediments were collected from a fishpond in San Jiang, Hainan Province, and biochar was produced from bamboo and modified with manganese (Mn) to enhance its properties. A 90‐day incubation experiment was conducted with six treatments: control (T1), sediment alone (T2), soil with 10% sediment (T3), soil with 3% biochar (T4), sediment with 3% biochar (T5), and soil with 10% sediment and 3% biochar (T6). Results showed that biochar and sediment amendments significantly increased soil pH, organic carbon content (SOC), and microbial biomass carbon (SMBC) and nitrogen (SMBN) with T6 exhibiting the highest increases in pH (9.51) and SOC (7.82 g kg−1), compared to the control (5.51 pH and 5.58 g kg−1 SOC). SMBC and SMBN were also significantly higher in T6, with increases of 37.32% and 76.11%, respectively. Additionally, N‐acquiring enzyme activities, particularly N‐acetylglucosaminidase (NAG) and leucine aminopeptidase (LAP), were enhanced in the biochar‐sediment treated soils, with T6 showing a remarkable increase compared to the control. N mineralization was significantly improved by the amendments, with T6 showing a 60.84% increase in total mineralized nitrogen. The N mineralization potential (No) in T6 was 61.87 mg kg−1, compared to 39.20 mg kg−1 in the control, and the mineralization rate constant (k) was highest in T6 (0.22 d−1). These results highlight the potential of Mn‐modified biochar and sediment as sustainable soil amendments that improve soil fertility, microbial activity, nitrogen cycling, and overall soil health in agricultural systems. [ABSTRACT FROM AUTHOR] |
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| ISSN: | 17571693 |
| DOI: | 10.1111/gcbb.70145 |
