| 北京地区春季稻稻田甲烷排放的研究 |
| 摘要点击 1120 全文点击 761 投稿时间：1994-02-05 |
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| 中文关键词 稻田甲烷 排放通量 农业管理 |
| 英文关键词 methane emission rice field emission flux field management |
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| 中文摘要 |
| 观测不同农业管理条件下,北京地区春季稻稻田甲烷的排放通量。以当地农民所惯用的管理方式为代表,排放通量为8.7mg/(m2·h).甲烷排放有季节性变化,以分蘖期和扬花期为峰值,土壤氧化还原电位的变化与甲烷排放有很好的相关性。施用过量的有机肥会增加排放,采用科学的间歇灌溉方式可以增产并降低甲烷的排放。旱直播技术虽可大大降低甲烷排放但影响水稻产量,有待进一步的研究。 |
| 英文摘要 |
| The emission of methane (CH4) from spring rice fields under different field managements was measured in Beijing in 1991. Under the traditional practice of local agricultural manasement, the CH4 emission flux was found to have a mean value of 8.7mg/(m2·h). The seasonal variation in CH4 emission was observed with the Peak values occurred in the tillering and flowering phases. The redox potential in soil was found to be correlated with CH4 emission. The organic manures applied in field resulted in an increased CH4 emission. Intermittent irrigation on a scientific basis to have an alternating dry and flooded paddy may be an effective way to increase rice yield and to reduce CH4 emission. Direct dry-sowing technology may largely out down CH4 emission but may reduce rice yield that needs to be further studied. |
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