Abstract: The experiment with different irrigation and green manure application was carried out in 1995. The Eh value was raised from - 206 mV to +38 mV by means of water control in the rice field. That resulted in decrease of the soluble methane content in soil water from 5. 54 to 0. 25 μg/mL. After flooding methane content increased very slowly. Under the condition of continuously irrigation, the soluble methane content maintained a high level, upto 12. 12 μg/mL. The soluble methane contents were higher at the lower part of the farming layers. At the depths of 0, 5, 10, 15 cm, the average contents of the soil methane were 1. 11, 3. 38, 4. 53 and 6. 00μg/mL, respectively.

Key words: green manure, irrigation, paddy field, soluble methane, temperature

摘要： 通过稻田控水可迅速提高土壤Eh值，由-206 mV升至+38 mV，土壤水溶解甲烷含量由平均5.54降至0.25 μg/mL，而且复水后甲烷含量上升极其缓慢。在持续淹灌条件下溶解甲烷含量一直处于较高水平，其峰值达到12.12 μg/mL。稻田耕层各层次进行比较，土壤溶解甲烷含量随深度增加而逐渐上升，土壤0、 5、 10和15 cm的甲烷平均含量分别为1.11、 3.38、 4.53和6.00 μg/mL。

关键词: 绿肥, 灌溉, 稻田, 溶解甲烷, 温度