湿地稻-鸭复合生态系统综合效益研究  

Integrated benefits of paddy rice-duck complex ecosystem.

作　　者：王华[1] 黄璜[1] 杨志辉[1] 廖晓兰[1] 

机构地区：[1]湖南农业大学农学院

出　　处：《农村生态环境》2003年第4期23-26,44,共5页Rural Eco-Environment

基　　金：国家863项目(863-306-ZD05-3-E);国家自然科学基金资助项目(39670142)

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。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.

关 键 词：湿地 稻-鸭复合生态系统 甲烷排放 土壤肥力 经济效益 

分 类 号：S181[农业科学—农业基础科学]