水稻品种以及施肥措施对稻田甲烷排放的影响

Effect of Rice Cultivars and Fertilizer Management on Methane Emission

１９９４年４月至１０月，在北京稻田试验田研究了不同水稻品种对甲烷排放的影响以及施肥措施对降低甲烷排放和提高水稻产量的匹配关系。实验表明稻田甲烷排放在品种之间存在着明显差异，实验中品种间甲烷排放通量最大差异可达到五倍。以有机肥混合硫酸铵作底肥并配合不同时间和不同用量的硫酸铵作追肥与仅施混合底肥不施硫酸铵作追肥的相比较可减少甲烷排放约５８％，水稻产量提高３１．７％。

Experiments were conducted during April Oct. 1994 in Beijing rice field. Large cultivar differences in methane emission flax have been found. Variety 93812 emitted about fivefold more CH 4 per meter square per hour than did the variety Qiuguang. Organic amendment plus (NH 4) 2SO 4 as the mixed base fertilizer and (NH 4) 2SO 4 as the topdressing applied in different amounts and stages compared with the mixed base fertilizer only could reduce methane emission about 58% and increase rice yield about 31.7%. Emission Peaks of CH 4 in the tillering stage and reproductive stage could be obviously suppressed.