Effects of Biochar Amendment on N2O Emission and Its Functional Genes in Pepper Growing Soil in Tropical Areas
Biochar application may mitigate N2O emissions and increase crop yield, yet little is known about microbial dynamics variation. To investigate the potential of increasing yield and reducing emissions of biochar in tropical areas and the dynamic mechanism of related microorganisms, a pot experiment was conducted to investigate the biochar application on pepper yield, N2O emissions, and dynamic variation of related microorganisms. Three treatments were applied:2% biochar amendment (B), conventional fertilization (CON), and no nitrogen (CK). The results showed that the yield of the CON treatment was higher than that of the CK treatment. Compared with that of the CON treatment, biochar amendment significantly increased the yield of pepper by 18.0% (P<0.05), and biochar amendment could increase the content of NH+4-N and NO-3-N in soil in most periods of pepper growth. Compared with that in the CON treatment, the B treatment significantly reduced cumulative N2O emissions by 18.3% (P<0.05). Ammonia oxidizing archaea (AOA)-amoA and ammonia oxidizing bacteria (AOB)-amoA were very significantly negatively correlated with N2O flux (P<0.01). N2O flux was significantly negatively correlated with nosZ gene abundance (P<0.05). This indicated that N2O emission may have mainly resulted from the denitrification process. In the early stage of pepper growth, biochar significantly reduced N2O emissions by reducing the value of (nirK+nirS)/nosZ, whereas in the late stage of pepper growth, the value of (nirK+nirS)/nosZ of the B treatment was higher than that of the CON treatment, resulting in higher N2O flux in the B treatment. Therefore, biochar amendment could not only increase vegetable production in tropical areas but also reduce N2O emissions, which can be used as a new strategy to improve soil fertility in Hainan Province and other tropical areas.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2023 |
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| Erschienen: |
2023 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:44 |
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| Enthalten in: |
Huan jing ke xue= Huanjing kexue - 44(2023), 6 vom: 08. Juni, Seite 3418-3425 |
| Sprache: |
Chinesisch |
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| Beteiligte Personen: |
Chen, Qi-Qi [VerfasserIn] |
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| Links: |
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| Themen: |
7664-41-7 |
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| Anmerkungen: |
Date Completed 14.06.2023 Date Revised 14.06.2023 published: Print Citation Status MEDLINE |
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| doi: |
10.13227/j.hjkx.202207119 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM35811652X |
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| 100 | 1 | |a Chen, Qi-Qi |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Effects of Biochar Amendment on N2O Emission and Its Functional Genes in Pepper Growing Soil in Tropical Areas |
| 264 | 1 | |c 2023 | |
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| 520 | |a Biochar application may mitigate N2O emissions and increase crop yield, yet little is known about microbial dynamics variation. To investigate the potential of increasing yield and reducing emissions of biochar in tropical areas and the dynamic mechanism of related microorganisms, a pot experiment was conducted to investigate the biochar application on pepper yield, N2O emissions, and dynamic variation of related microorganisms. Three treatments were applied:2% biochar amendment (B), conventional fertilization (CON), and no nitrogen (CK). The results showed that the yield of the CON treatment was higher than that of the CK treatment. Compared with that of the CON treatment, biochar amendment significantly increased the yield of pepper by 18.0% (P<0.05), and biochar amendment could increase the content of NH+4-N and NO-3-N in soil in most periods of pepper growth. Compared with that in the CON treatment, the B treatment significantly reduced cumulative N2O emissions by 18.3% (P<0.05). Ammonia oxidizing archaea (AOA)-amoA and ammonia oxidizing bacteria (AOB)-amoA were very significantly negatively correlated with N2O flux (P<0.01). N2O flux was significantly negatively correlated with nosZ gene abundance (P<0.05). This indicated that N2O emission may have mainly resulted from the denitrification process. In the early stage of pepper growth, biochar significantly reduced N2O emissions by reducing the value of (nirK+nirS)/nosZ, whereas in the late stage of pepper growth, the value of (nirK+nirS)/nosZ of the B treatment was higher than that of the CON treatment, resulting in higher N2O flux in the B treatment. Therefore, biochar amendment could not only increase vegetable production in tropical areas but also reduce N2O emissions, which can be used as a new strategy to improve soil fertility in Hainan Province and other tropical areas | ||
| 650 | 4 | |a English Abstract | |
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a N2O emission | |
| 650 | 4 | |a biochar | |
| 650 | 4 | |a dynamic change | |
| 650 | 4 | |a functional gene | |
| 650 | 4 | |a pepper yield | |
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| 650 | 7 | |a Ammonia |2 NLM | |
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| 650 | 7 | |a Soil |2 NLM | |
| 700 | 1 | |a Wang, Zi-Jun |e verfasserin |4 aut | |
| 700 | 1 | |a Chen, Yun-Zhong |e verfasserin |4 aut | |
| 700 | 1 | |a Wang, Yu-Qin |e verfasserin |4 aut | |
| 700 | 1 | |a Zhu, Qi-Lin |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Tian-Yi |e verfasserin |4 aut | |
| 700 | 1 | |a Hu, Yu-Jie |e verfasserin |4 aut | |
| 700 | 1 | |a Wu, Yan-Zheng |e verfasserin |4 aut | |
| 700 | 1 | |a Meng, Lei |e verfasserin |4 aut | |
| 700 | 1 | |a Tang, Shui-Rong |e verfasserin |4 aut | |
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