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| Relationship between methane emissions and soil enzymes of different rice varieties |
| Received:May 09, 2020 |
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| KeyWord:rice varieties;methane;catalase;urease;correlation |
| Author Name | Affiliation | E-mail | | ZHOU Wen-tao | Crop Cultivation Scientific Observation and Experiment Station in Central China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | GE Jia-min | Crop Cultivation Scientific Observation and Experiment Station in Central China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | WANG Bo-ran | Crop Cultivation Scientific Observation and Experiment Station in Central China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | LONG Pan | Crop Cultivation Scientific Observation and Experiment Station in Central China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | XU Ying | Crop Cultivation Scientific Observation and Experiment Station in Central China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China | | | FU Zhi-qiang | Crop Cultivation Scientific Observation and Experiment Station in Central China, College of Agronomy, Hunan Agricultural University, Changsha 410128, China | zqf_cis@126.com |
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| Abstract: |
| To clarify the relationship between methane emissions and soil enzymes on different rice varieties, we used three field varieties of early rice and late rice as test materials to collect methane by closed and obscure static box method for field experiment,monitored the dynamics of methane emissions from different varieties of early rice and late rice, determinated the catalase activity and urease activity of different methane emission rhizosphere soil. The relationship between methane emission and enzyme activities was analyzed by linear regression analysis. The results showed that:there was a significant difference between early rice and late rice varieties in methane emission. The cumulative methane emission of early rice varieties was the highest in Xiangzaoxian 24 and the lowest in Zhuliangyou 819, with a difference of 31.78%. The late rice Xiangwanxian17 was the highest, and the Y liangyou1 was the lowest, with a difference of 17.31%. The cumulative methane emissions of late rice varieties were significantly higher than that of early rice. Catalase activities of early rice were highest at booting stage, catalase activities of late rice and urease activities of early rice and late rice were highest at tillering stage. The activity of catalase and urease in rhizosphere soil of different early rice and late rice varieties were different at different growth stages. The positive correlation between methane emission and urease in double-cropping rice field reached an extremely significant level (P<0.01), and the positive correlation with catalase reached a significant level (P<0.05). In conclusion, methane emission of rice varieties is closely related to catalase and urease in rhizosphere soil of rice, reducing the activity of catalase and urease in soil is beneficial to reducing methane emission in rice field. |
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