Estimation of N2O emission from tea garden soils, their adjacent vegetable garden and forest soils in eastern China |
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| Authors: | Wenyan Han Jianming Xu Kang Wei Yuanzhi Shi Lifeng Ma |
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| Institution: | 1. Institute of Soil and Water Resources and Environmental Science, Zhejiang University, Hangzhou, 310058, China
2. Tea Research Institute, Chinese Academy of Agricultural Sciences, 9 South Meiling Road, Hangzhou, 310008, China
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| Abstract: | The objective of this study was to investigate nitrous oxide (N2O) emissions from different land-use types in eastern China. The dynamic changes of N2O emissions were investigated in tea gardens with different nitrogen application rates, their adjacent vegetable garden and forest soils from June 2009 to May 2010. The results showed that high nitrogen application in a tea garden significantly increased soil N2O emissions. Lower N2O emission and percentage of N2O–N to the applied N were observed in a tea garden with low N application than that from vegetable garden, indicating reasonable control of N application can efficiently decrease N2O pollution in tea gardens. Both air and soil temperature had significant and positive impact on N2O emissions, but little effect of precipitation was observed. Therefore, N application rate and environmental temperature are the most essential factors in influencing N2O emission and should be taken into consideration in the field management of tea production. |
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