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OALib Journal期刊
ISSN: 2333-9721
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氢气对刺槐根际土壤微生物种群和土壤酶活性的影响
DOI: 10.3724/SP.J.1145.2010.00515, PP. 515-518
Keywords: 氢气,根际土壤,氢氧化细菌,微生物代谢强度,土壤酶,根瘤固氮,刺槐
Abstract:
模拟豆科植物根瘤在固氮过程中释放氢气，分析其对根际土壤产生的影响.从黄土高原人工刺槐林采集有根瘤的刺槐根际土壤样品，采用电解水产生氢气分次处理，对处理后与未处理的土壤样品内微生物种群数量、微生物代谢强度及土壤脱氢酶、过氧化氢酶、脲酶、转化酶等指标进行比较分析.氢气处理后的两批土样中，氢氧化细菌数量均显著增多，分别占9月、5月土壤微生物总量的34.9%和32.4%；微生物在土壤中代谢强度分别增加了140.2%和57.6%；土壤脱氢酶、过氧化氢酶、脲酶和转化酶含量均表现增加，其中9月处理土壤分别增加36.6%、57.1%、26.6%和147.0%，5月处理土壤分别增加37.2%、6.6%、108.8%和147.0%.研究结果为根瘤固氮过程中产生氢气对根际土壤微环境的影响及促生机制提供了实验资料.图2表3参14
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