【摘要】 2000年3月至2001年10月在湖南长沙进行了湿地稻-鸭复合生态系统综合效益的小区试验。结果表明,实行稻-鸭生态种养显著降低稻田甲烷排放量,与常规稻田相比,甲烷排放总量在早稻田与晚稻田分别降低44.2%和40.7%。各处理晚稻田甲烷排放总量高于早稻田甲烷排放总量。养鸭稻田与常规稻田相比,土壤肥力都有所增加,土壤容重降低,>0.25mm团聚体增加2.65～3.12百分点,土壤结构系数增加2.56～6.63百分点。同时,稻田土壤氧化还原状况也得到明显改善。湿地稻-鸭复合生态系统直接的经济效益也远高于常规稻田。更多还原

【Abstract】 Integrated benefits of rice-duck complex ecosystem,including reduction of methane emission and other eco-economic benefits,were studied by adopting plot experiments.The results showed that compared with conventional paddy fields,the pattern of rice-duck ecological planting and breeding significantly reduced the total amount of methane emission from paddy fields,by 44.2% for early rice and 40.7% for late rice.Methane emission was higher from late rice fields than from early rice fields,in all treatments.At the same time,soil fertility and physical characteristics of the soil in the rice-duck complex ecosystem were both improved,and redox status of the soil was also markedly meliorated.What′s more,the direct economic benefit of the rice-duck complex ecosystem was higher than that of the conventional paddy fields.更多还原