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通过网室水稻盆栽试验 ,探讨几种有机无机肥混施方式对CH4排放的影响 .结果表明 ,水稻土CH4排放有明显的逐日变化 ,在水稻分蘖末期和抽穗前期出现CH4排放高峰 .不同有机无机肥混施方式对CH4排放的影响明显 ,最高和最低的CH4排放量分别为 8.1 2和 5.72 g·m- 2 ,两者相差 42 .0 % .粒状有机无机复肥的CH4排放量高 ,但稻谷产量也高 ,因而其单位稻谷产量的CH4排放量反而较低 .
The effects of organic and inorganic fertilizers on CH4 emission were investigated by paddy rice pot experiments in paddy soils.The results showed that there was a clear daily change of CH4 emission in paddy soils and the peak of CH4 emission occurred at the late tillering stage and heading stage in rice paddy.The organic matter CH4 emissions were significantly affected by mixed application of fertilizer, the highest and lowest CH4 emissions were 8.12 and 5.72 g · m-2, respectively, with a difference of 42.0%. CH4 emissions from granular organic-inorganic complex fertilizers were high but Rice production is also high, so CH4 emissions per unit of paddy output are rather low.