水稻田中产甲烷菌数量和优势种
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* 浙江省自然科基金


AMOUNT AND DOMINANT SPECIES OF MPB IN SUBMERGED PADDY SOIL
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    摘要:

    采用改良的亨格特(Hungate)厌氧技术,用MPN法和滚管法同时测定水稻不同生育期土壤中的产甲烷菌数量有明显差异,在混合基质中生长的产甲烷菌数量,早稻在分蘖末期数量最高,可达3.6×1010个/克干土;在H2和CO2生长的产甲烷菌数量,晚稻在分蘖盛期明显增高,到乳熟期可高达3.1×1011个/克干土;在甲酸钠和乙酸钠基质中生长的产甲烷菌数量,晚稻在分蘖盛期较高,分别达3.7×108个/克千土和1.2×108个/克干土;在甲醇基质中生长的产甲烷菌数量,晚稻在各生育期差异不显著。不同深度土壤中产甲烷菌数量无显著差异。施用有机肥料在一定程度上可促进产甲烷菌数量的递增。水稻土中占优势的产甲烷菌种群为甲酸甲烷杆菌(Methanobacterium formicicum)、马氏甲烷八叠球菌(Methanosarcina mazei)和巴氏甲烷八叠球菌(Methanosarcina barkeri)。

    Abstract:

    With improved Hungate anaerobic technique, the amounts of methane—producing bacteria (MPB) in the submerged paddy soil planting rice crop were determined by the MPN (The Most Probable Number) method and the rolll tube method at the same time. The esults obtained showed that the amounts of MPB during different growing periods of rice were significantly different, the amount of MPB grown on mixed substrate was the highest at the late tillering stage of early rice, up to 3.6×1010/g dry soil; that on H2/CO2 increased significantly at the vigorously tillering stage of late rice, reaching 3.1×1011/g dry soil at milk ripening stage; the amounts of MPB grown on formate and acetate were higher, about 3.7×108/g dry soil and 1.2×108/g dry soil respectively at the vigorously tillering stage of late rice; and that of MPB grown on methanol-had no significant difference during the different growing periods being, about 3.5×105/g dry soil. The amounts of MPB had no marked diffea-ence in soil at different depths.

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陈美慈,闵航,钱泽澍.水稻田中产甲烷菌数量和优势种[J].土壤学报,1993,30(4):432-437. Chen Meici, Min Hang, Qian Zeshu. AMOUNT AND DOMINANT SPECIES OF MPB IN SUBMERGED PADDY SOIL[J]. Acta Pedologica Sinica,1993,30(4):432-437.

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  • 在线发布日期: 2013-02-25
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