Large-Scale Biochar Incorporation Does Not Necessarily Promote the Carbon Sink of Estuarine Wetland Soil
Abstract
:1. Introduction
2. Materials and Methods
2.1. Soil Collection and Biochar Preparation
2.2. Experimental Procedures
2.3. Soil and Plant Analyses
2.3.1. Plant TC and TN Content
2.3.2. Soil pH and SR
2.3.3. Soil Enzyme Activity
2.3.4. Soil DNA Extraction and Soil Microbial Structure Analysis
2.4. Data Processing and Statistical Analysis
3. Results
3.1. Plant Growth
3.2. Response of Soil Respiration
3.3. Response of Soil β-Glucosidase and Dehydrogenase Activities
3.4. Response of Soil Microbial Biomass and Community Structure
4. Discussion
4.1. Large-Scale of Biochar Incorporation May Weaken Its Promotion of Plant Growth and CO2 Sequestration in Estuarine Wetland Soil
4.2. The Different Effect of Various Rate of Biochar Incorporation to Estuarine Wetland Soil Was Generated via Soil Microbes with Different Functions
5. Conclusions
Author Contributions
Funding
Institutional Review Board Statement
Informed Consent Statement
Data Availability Statement
Conflicts of Interest
Appendix A
Treatments | CK | B1 | B2 | B3 | B4 | B5 | |
---|---|---|---|---|---|---|---|
TN, mg·kg−1 | May | 2.85 ± 0.03a | 2.56 ± 0.11b | 2.99 ± 0.13b | 3.14 ± 0.09b | 3.57 ± 0.15c | 2.90 ± 0.05b |
June | 3.01 ± 0.22a | 3.06 ± 0.14a | 3.24 ± 0.22a | 3.17 ± 0.08b | 3.78 ± 0.21c | 3.44 ± 0.13a | |
July | 3.09 ± 0.12a a | 3.15 ± 0.22a | 3.46 ± 0.23a | 3.47 ± 0.19a | 4.78 ± 0.31a | 3.55 ± 0.17a |
Treatments | CK | B1 | B2 | B3 | B4 | B5 | |
---|---|---|---|---|---|---|---|
pH | May | 7.21 ± 0.02b | 7.18 ± 0.02b | 7.16 ± 0.01b | 7.05 ± 0.01c | 7.08 ± 002c | 7.25 ± 0.03c |
June | 7.32 ± 0.04a | 7.19 ± 0.02b | 7.19 ± 0.02b | 7.15 ± 0.01b | 7.28 ± 0.03b | 7.72 ± 0.04a | |
July | 7.23 ± 0.02 b a | 7.31 ± 0.05 a | 7.35 ± 0.04a | 7.34 ± 0.04 a | 7.42 ± 0.05a | 7.29 ± 0.09c |
Items | Soil | B4 | B5 |
---|---|---|---|
TC (%) | 2.07 ± 0.098 a | 65.07 ± 9.89 | 41.03 ± 2.71 |
EOC (%) | 0.74 ± 0.019 | 7.23 ± 1.80 | 36.60 ± 2.15 |
EOC/TC (%) | 35.56 | 11.12 | 89.21 |
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Treatments | Sequences | OTUs d | Chao | ACE | Shannon |
---|---|---|---|---|---|
CK a | 50,923 | 2989 | 3808.92 | 3901.23 | 9.85 |
B4 b | 67,765 | 3499 | 3972.07 | 3933.15 | 9.94 |
B5 c | 70,645 | 3109 | 4067.59 | 4099.58 | 10.08 |
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Xie, M.; Lu, X.; Wang, H.; Fu, X.; Wang, L. Large-Scale Biochar Incorporation Does Not Necessarily Promote the Carbon Sink of Estuarine Wetland Soil. Sustainability 2023, 15, 16709. https://doi.org/10.3390/su152416709
Xie M, Lu X, Wang H, Fu X, Wang L. Large-Scale Biochar Incorporation Does Not Necessarily Promote the Carbon Sink of Estuarine Wetland Soil. Sustainability. 2023; 15(24):16709. https://doi.org/10.3390/su152416709
Chicago/Turabian StyleXie, Mengdi, Xiaojuan Lu, Han Wang, Xiaohua Fu, and Lei Wang. 2023. "Large-Scale Biochar Incorporation Does Not Necessarily Promote the Carbon Sink of Estuarine Wetland Soil" Sustainability 15, no. 24: 16709. https://doi.org/10.3390/su152416709