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| 水稻植株对稻田CH4排放日变化的影响 | |
| 引用本文： | 马静,徐华,蔡祖聪,八木一行.水稻植株对稻田CH4排放日变化的影响[J].土壤,2007,39(6):859-862. |
| 作者姓名： | 马静 徐华 蔡祖聪 八木一行 |
| 作者单位： | 1. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008;中国科学院研究生院,北京,100049 2. 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京,210008 3. 日本国立农业环境技术研究所,日本筑波,305 |
| 基金项目： | 国家自然科学基金;中国科学院南京土壤研究所创新领域前沿项目 |
| 摘 要： | 2005年采用静态箱法,在水稻分蘖期天气晴朗的条件下,全天观测了有、无水稻植株两种情况下稻田CH4的排放.结果表明:无论水稻种植与否,稻田CH4排放通量的昼夜变化均表现为单峰模式,极大值出现在下午14点;稻田CH4排放的昼夜变化与5cm处土温存在显著正相关关系(p＜0.05);有水稻植株处理稻田CH4日平均排放通量显著高于无水稻植株处理(p＜0.05);有水稻植株处理的稻田CH4排放通量最佳观测时间在上午8～10点,无水稻植株处理的最佳观测时间则在傍晚18点左右. |
| 关 键 词： | CH4排放 日变化 最佳观测时间 水稻植株 |
Diurnal Variation of CH4 Emission from Rice Field as Affected by Rice Plant |
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| MA Jing,XU Hu,CAI Zu-cong and YAGI Kazuyuki.Diurnal Variation of CH4 Emission from Rice Field as Affected by Rice Plant[J].Soils,2007,39(6):859-862. | |
| Authors: | MA Jing XU Hu CAI Zu-cong and YAGI Kazuyuki |
| Institution: | State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science, Chinese Academy of Sciences), Nanjing 210008, China;Graduate School of Chinese Academy of Sciences, Beijing 100049, China,State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science, Chinese Academy of Sciences), Nanjing 210008, China,State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science, Chinese Academy of Sciences), Nanjing 210008, China and National Institute of Agro-Environmental Sciences, Tsukuba 305, Japan |
| Abstract: | In 2005, diurnal variations of CH4 fluxes from rice-vegetated and non-rice-vegetated fields at tillering stage and under clear weather condition was monitored using a closed chamber technique. The results showed that the variation pattern of CH4 emitted from all the fields followed a single-peak mode with the peak appearing at 14 o''clock in the afternoon. Significant positive correlations were found between CH4 flux and soil temperature at 5 cm (p<0.05). The diurnal mean CH4 flux from rice-vegetated field was significantly higher than that from non-rice-vegetated field(p<0.05). About 8~10 o''clock was recommended as the optimum sampling time for rice-vegetated plot, while about 18 o''clock was recommended as the optimum sampling time for non-rice-vegetated plot. |
| Keywords: | CH_4 emission Diurnal variation Optimum sampling time Rice plant |
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