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Luo, Yan; Dungait, Jennifer; Xin, Zhao; Brookes, Philip C.; Durenkamp, Mark; Li, Guitong; Lin, Qimei

doi:10.1002/ldr.3084

Cited by 1 publication

(4 citation statements)

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“…Where δ 13 CO 2,biochar and δ 13 CO 2,control are the δ 13 C values of CO 2 produced from soils with and without biochar, respectively, while δ 13 C biochar and δ 13 C soil are the δ 13 C values of biochars and soil (Luo et al, 2011).…”

Section: Discussionmentioning

confidence: 99%

“…Visible plant residues were removed, and then the soil was airdried and passed through a 2 mm sieve. Soil pH was determined in distilled water suspension (1:2.5, weight/volume) by a pH meter (Starter 300, United States) (Luo et al, 2011), whereas total C (TC) and total N (TN) were determined by dry combustion using a Vario MAX CN analyzer (Elementar, Germany) (Tian et al, 2019). Soil particle size was determined by laser diffraction method as described by Yang et al (2015), soil sample (300 mg) was treated in 10% H 2 O 2 solution for 48 h with occasional stirring (5 times) to remove the organic material; carbonates were then removed using 0.2% HCl solution, and soil aggregates were dispersed using 0.5 M Na 6 (PO 3 ) 6 solution.…”

Section: Soil Collection and Characterizationmentioning

confidence: 99%

“…S. superba-derived biochars at 350°C, 550°C and 750°C pyrolysis were named as SB 350 , SB 550 and SB 750 , while C. lanceolata-derived biochars at 350°C, 550°C, and 750°C pyrolysis temperatures were named as CB 350 , CB 550, and CB 750 . For each biochar, the pH was measured by a pH meter in distilled water (1:15, weight/volume), whereas total dissolved organic C (DOC) was extracted with distilled water (1:10, weight/ volume) and measured with a TOC-VCPH analyzer (Shimadzu, Japan) (Luo et al, 2011). The TC and TN were determined with a Vario EL III CN analyzer (Elementar, Germany) (Yang et al, 2005).…”

Section: Biochar Production and Characterizationmentioning

confidence: 99%

“…The NaOH trap vials were collected and replaced by new vials at 3, 7, 14, 28, 56, 84, and 112 days, respectively. The sampling time intervals were selected according to Luo et al (2011) and Cui et al (2017). During the incubation, all treatments were maintained in a chamber at 25°C for 112 days in the dark.…”

Section: Incubation Experimentsmentioning

confidence: 99%

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Effects of Biochar Feedstock and Pyrolysis Temperature on Soil Organic Matter Mineralization and Microbial Community Structures of Forest Soils

Yin

et al. 2021

Front. Environ. Sci.

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Biochar has received much attention as a strategy to enhance soil carbon (C) sequestration and mitigate climate change. Previous studies found that the feedstock and pyrolysis temperature can largely determine biochar properties, which in turn, impact the stability of native soil organic matter (SOM) and soil microorganisms. The Schima superba and Cunninghamia lanceolata are two tree species widely distributed in the subtropical region of southern China, but how the biochars from these two species influence the soil C sequestration and microbial communities of plantation remain poorly understood. In this study, we produced biochars from these two different feedstocks (13C-labeled S. superba and C. lanceolata litters) at three pyrolysis temperatures (350°C, 550°C, 750°C), then added them to the soils from C. lanceolata plantation, and maintained the experiments at 25°C for 112 days. We found both C mineralization and soil microbial community structures were strongly, but inconsistent, affected by biochar feedstock and pyrolysis temperature. The C. lanceolata biochar triggered the negative priming effect faster and greater compared with the S. superba biochar amendment. Biochars produced at 550°C showed the most significant negative priming effect during the whole incubation period, regardless of the different feedstocks. The cumulative amount of CO2 derived from biochars was significantly decreased with pyrolysis temperature (p < 0.05), indicating that biochars prepared at higher temperatures were more stable in the soil. Further, the soil microbial community structure was only affected by biochar pyrolysis temperature rather than biochar feedstock and their interaction. Together, our results reveal that biochar feedstock and pyrolysis temperature may play more important roles in dictating the priming effect than the structure of microbial community for C. lanceolata plantation. Overall, we concluded that the biochars prepared at 550°C could rapidly decrease the turnover of native SOM in a short term and biochar amendment has the potential to be a management practice for soil C sequestration in the C. lanceolata plantation.

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Section: Discussionmentioning

confidence: 99%