草地学报

›› 2002, Vol. 10 ›› Issue (2): 134-138.DOI: 10.11733/j.issn.1007-0435.2002.02.011

• 研究报告 • 上一篇    下一篇

东北羊草草原土壤微生物生长动态模型的研究

张崇邦   

  1. 浙江省台州学院生化系, 临海, 317000
  • 收稿日期:2001-10-25 修回日期:2002-01-10 出版日期:2002-05-15 发布日期:2002-05-15
  • 作者简介:张崇邦(1937- ),男,理学硕士,副教授,主要从事土壤生态学研究,已发表近30篇学术论文
  • 基金资助:
    国家自然科学基金资助项目一部分(编号:9389009-I)

Study on the Seasonal Dynamics Model of Soil Microbial Growth on the Leymus chinensis Meadow in the Northeast of China

ZHANG Chong-bang   

  1. Department of Biology and Chemistry, Taizhou College, Linhai, Zhejiang, 317000, China
  • Received:2001-10-25 Revised:2002-01-10 Online:2002-05-15 Published:2002-05-15

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摘要： 研究东北羊草草原杂草土壤微生物生物量、呼吸速率以及土壤环境因子的季节动态。结果表明,杂草土壤微生物生物量、呼吸速率具有明显的季节变化规律,最大值出现在 8月(12.78×10-3g·g-1干土,16.24×10-3g·g-1干土·d-1),呈单峰曲线变化趋势。主要与土壤营养成分、水热条件有密切关系。建立了杂草土壤微生物生长模型--IBM模型:Mt+△t=Mto[1+(0.38rn- RDR△t] 。杂草土壤环境因子综合作用指数 rn 变化范围在0.1475-0.4032之间,具有重要的生态学意义。

关键词: 杂草草甸, 土壤, 微生物生物量, IRM模型

Abstract: The seasonal dynamics of microbial biomass,respiration rate,soil ecological factors on the Leymus chinensis meadow were studied.The seasonal patterns of microbial biomass and respiration rate were found to follow a relief curve.In August,there is a biggest value which were 12.78×10-3g·g-1(dry soil),16.24×10-3g·g-1(dry soil)·d-1.The variation of the microbial biomass curve mainly related with nutritional components,water content and temperature.In addition,the integrative effect of ecological factors upon microbes,estimated by the IRM model,was also studied:Mt+△t=Mto+(0.38rn-RDR△t].The integrated index of the effect of weeds soil ecological factors upon microbial biomass was defined as rn which is from 0.1457 to 0.4032,and has a ecological importance.

Key words: Weeds meadow, Soil microbes, Microbial biomass, IRM model

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