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分析了2003、2004年广东省清远市郊区早、晚稻稻田甲烷(CH4)的排放通量,结果表明广东清远早、晚稻稻田CH4排放通量的几何平均值2003年为4.38mg·m-2·h-1和6.09mg·m-2·h-1;2004年为5.17mg·m-2·h-1和8.3mg·m-2·h-1,土壤有机质含量是造成2003和2004年CH4排放差异的原因之一。水稻品种的不同,CH4排放通量也有所不同,实验表明,水稻品种“七丝尖”的排放通量比品种“金优99”高1.08mg·m-2·h-1,产量却只有64%。此外,与相关的测量结果进行初步比较。
The emission fluxes of methane (CH4) from early and late rice paddy fields in Qingyuan City, Guangdong Province in 2003 and 2004 were analyzed. The results showed that the geometric mean of CH4 fluxes in early and late rice paddies in Qingyuan of Guangdong in 2003 was 4.38 mg · m -2 h-1 and 6.09 mg · m-2 · h-1 respectively. In 2004, the soil organic matter content was 5.17 mg · m-2 · h-1 and 8.3 mg · m-2 · h-1, One of the reasons for the difference in emissions. Different rice varieties, CH4 emission flux is also different, the experiment showed that the rice varieties “Qiansi tip” than the variety “Jinyou 99” high 1.08mg · m-2 · h-1, the output was only 64 %. In addition, a preliminary comparison is made with the relevant measurement results.