该文采用养分流的分析方法,对比分析2007年中国13个沼气发展省份沼气农户和非沼气农户农田养分管理行为的差异。结果显示:两类农户单位面积化肥用量和秸秆还田率方面没有明显差异,部分地区沼气农户生活燃料比例明显减少,但地头秸秆燃烧情况加剧;粪尿养分还田率有较大不同,非沼气农户粪尿直接还田率达到96%,沼气农户只有39%,沼气农户大量粪尿进入沼气池,但只有33%的养分被利用,沼肥养分仅占沼气农户养分输入总量的9%。综合比较,沼气农户家庭有机养分比重仅有24%,而非沼气农户达到了43%;这导致了沼气农户单位面积养分输入总量为781.62kg/hm2,显著低于非沼气农户的850.82kg/hm2。沼气农户的废弃物养分循环利用率只有45%,而非沼气农户达到70%。研究结果表明中国沼气农户并没有因为沼气发展而提高养分再利用,沼肥对化肥的替代效果没有表现出来,导致有机资源浪费。因此,必须加强沼气农户的技术培训,加强沼肥的还田力度,提高养分循环利用率,充分发挥沼气对家庭养分资源再利用的优势。 This paper analyzes the difference of farmland nutrient management behavior between biogas farmers and non-biogas farmers in 13 biogas development provinces in 2007 through the method of nutrient flow analysis. The results showed that there was no significant difference between the two types of fertilizer use per unit area of ​​manure and straw return rate, biogas farmers living fuel ratio decreased significantly in some areas, but the burning of ground straw increased; different manure nutrient rates are quite different, non-biogas The direct return rate of excrement of farmers reached 96%, while that of biogas farmers was only 39%. Large amounts of excrement of biogas farmers entered the digester, but only 33% of the nutrients were utilized and biogas nutrient only accounted for 9% of the total input of biogas farmers. By comparison, only 24% of the organic nutrients of biogas households are compared with 43% of the non-biogas households, resulting in a total biogas input of 781.62kg / hm2 per unit area, significantly lower than that of non-biogas households of 850.82kg / hm2. Biogas farmers’ waste nutrient recycling rate is only 45%, while non-biogas farmers reached 70%. The results show that biogas farmers in China did not increase their nutrient reuse because of biogas development. The substitution effect of biogas fertilizer on chemical fertilizers has not been demonstrated, resulting in the waste of organic resources. Therefore, we must strengthen the technical training of biogas farmers to strengthen the return of marsh manure, improve nutrient recycling rate, give full play to the advantage of biogas on the family nutrient re-use.