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应用生态学报 ›› 1998, Vol. 9 ›› Issue (4): 435-439.

• 研究论文 • 上一篇    下一篇

地膜覆盖栽培对土壤微生物种群和生物活性的影响

陈锡时, 郭树凡, 汪景宽, 张键   

  1. 沈阳农业大学, 沈阳110161
  • 收稿日期:1998-04-22 修回日期:1998-05-19 出版日期:1998-07-25 发布日期:1998-07-25
  • 基金资助:

    国家教委博士点基金资助项目(920305)

Effect of mulching cultivation with plastic film on soil microbial population and biological activity

Chen Xishi, Guo Shufan, Wang Jingkuan, Zhang Jian   

  1. Shenyang Agricultural University, Shenyang 110161
  • Received:1998-04-22 Revised:1998-05-19 Online:1998-07-25 Published:1998-07-25

摘要: 研究了覆膜栽培条件下土壤微生物种群和生物活性。棕壤长期覆膜种植玉米,土壤表层微生物数量增多,细菌、放线菌和真菌分别增加22.6%、29.3%和19.7%. 苗期细菌增加最多,达21.4%, 拔节期和成熟期放线菌增加最多,为22.4%和24.4%, 生育期真菌增加幅度12.2~14.6%. 细菌中兼厌气性种群优势有所增强,真菌优势种群无变化。肥力水平不同地块覆膜均加强土壤呼吸作用,高肥地块土壤脲酶活性升高,低肥地块无变化。

关键词: 地膜覆盖, 土壤微生物, 生物活性

Abstract: Studies on the soil microbial population and biological activity in a brown earth continuously planted with corn and covered with plastic film show that after long-term mulching, the numbers of bacteria, actinomyces and fungi in the topsoil increased 22.6%, 29.3% and 19.7 %, respectively.At seedling stage, bacteria increased by 21.4%; at elongating and ripening stages, actinomyces increased by 22.4% and 24.4%, respectively; and within the whole growth period, fungi increased 12.2~14.6%.In addition, the dominant facultative anaerobial populations of bacteria tended to be increased, but those of fungi were not to be changed.Soil respiration rate was also enhanced by mulching in all sites with different fertility, but soil urease activity only increased obviously in the site with high fertility.

Key words: Mulching with plastic film, Soil microorganism, Biological activity