Abstract: In order to investigate high efficient crop planting model by biogas, improve land utilization rate and economic efficiency, and explore the material resources for biogas project, this paper took energy maize (Pioneer 335) as object, compared and analyzed the land methane production under different cropping patterns, so as to find the most suitable planting mode for energy maize and improve land utilization rate. The results showed that: ① Different energy corn harvest time had different biomass and land methane production. Those of energy corn harvested at dough stage were higher than that harvested at milk-ripe stage. ② Compared with one-year-two-harvest energy corn harvested at milk-ripe stage, biomass and land methane production of one-year-one-harvest energy corn harvested at dough stage were higher. ③ The weather conditions during energy corn growth period had greater influence on biomass and land methane production. ④ Higher earning could be obtained by the planting pattern of one-year-one-harvest energy corn harvested at dough stage, used as energy resource of biogas project in this area, according to the planting and related cost analysis and combined with land methane production. ⑤ The most suitable harvest time of energy corn (Pioneer 335) used as material of biogas industry was when the plant dry matter content between 35%~40%.

Key words: biogas, energy corn, planting pattern, biomass, land methane production

摘要： 为研究沼气作物的高效种植模式，提高土地利用率和经济效益，拓展沼气工程物料来源。以能源玉米（先玉335）为对象分析不同种植模式下土地甲烷产量的情况，探索能源玉米土地高效利用的最适种植模式。结果表明：①能源玉米的收获期不同，其生物质产量、土地甲烷产量均不同，且蜡熟期收获的比乳熟期收获的生物质产量、土地甲烷产量均较高；②能源玉米一年一季播种蜡熟期收获的与一年两季播种乳熟期收获的两季累计相比较，其生物质产量和土地甲烷产量均较高；③能源玉米生长期内的气候条件对其生物质产量和土地甲烷产量有较大影响；④从种植及相关成本分析以及结合土地甲烷产量，该地区用于沼气物料的能源玉米种植模式采用一年一季播种蜡熟期收获更适宜，从而可获得较高的收益。⑤能源玉米（先玉335）作为产业沼气作物其最适收获时期为植株干物质含量35%~40%。

关键词: 沼气, 能源玉米, 种植模式, 生物质量, 土地甲烷产量