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| Effects of tea litter applications on N2O and CO2 fluxes from acidification of tea garden soil in Central China |
| Received:January 13, 2016 |
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| KeyWord:tea litter;acidification of tea garden;N2O flux;CO2 flux;pH value |
| Author Name | Affiliation | E-mail | | TIAN Ya-nan | College of Resources and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | | | HE Zhi-long | College of Resources and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | | | LÜ Zhao-qi | College of Resources and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | | | XIA Wen-jian | Institute of Soil Fertilizer and Resource Environment, Jiangxi Academy of Agricultural Sciences, Nanchang 330200, China | | | LIN Shan | College of Resources and Environment, Huazhong Agricultural University/Key Laboratory of Arable Land Conservation in Middle and Lower Reaches of Yangtze River, Ministry of Agriculture, Wuhan 430070, China | linshan@mail.hzau.edu.cn |
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| Abstract: |
| Tea litter may impact soil microbes and soil properties, thus greenhouse gas emissions from soil. In this paper, a laboratory study was conducted to investigate N2O and CO2 fluxes from acidification of tea garden soil receiving different amounts of tea litter:0, 5, 10 g·kg-1 and 20 g·kg-1 soil. Results showed that N2O and CO2 fluxes from four treatments ranged from 0.24 μg·kg-1·h-1 to 3.92 μg·kg-1·h-1 and 0.33 mg·kg-1·h-1 to 1.84 mg·kg-1·h-1, respectively. Tea litter applications significantly increased N2O and CO2 fluxes(P<0.05) in a dose-effect manner. Soil pH values from three tea litter treatments were significantly higher(P<0.05) than that from the control treatment, and the pH values increased with increasing amounts of tea litters added. The N2O emissions from tea garden soil had significantly positive correlation with soil NH4+-N content, but did not show relationship with soil NO3--N. Soil DOC content was significantly positive correlated with N2O and CO2 fluxes. There was highly significant and positive correlation between N2O and CO2 fluxes in tea garden soil. These results would advance our understanding of greenhouse gas fluxes and carbon and nitrogen cycling in tea garden soil system. |
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