四川农业大学学报 ›› 2011, Vol. 29 ›› Issue (04): 472-476.doi: 10.3969/j.issn.1000-2650.2011.04.005

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巨桉人工林不同林龄阶段土壤微生物多样性特征

陈礼清, 张丹桔, 张健   

  1. 四川农业大学生态林业研究所, 生态林业工程省级重点实验室, 四川 温江 611130
  • 收稿日期:2011-10-31 出版日期:2011-12-31 发布日期:2017-04-12
  • 通讯作者: 张健,教授,博导,从事森林培育及森林生态学研究,E-mail:sicauzhangjian@163.com。 E-mail:sicauzhangjian@163.com
  • 作者简介:陈礼清,副教授,从事森林培育及森林生态学研究,E-mail:yachenliqing@163.com。
  • 基金资助:
    国家科技支撑计划课题(2011BAC09B05);国家自然科学基金项目(30872014)

Soil Microbial Biodiversity across a Range of Eucalyptus grandis Plantation Ages

CHEN Li-qing, ZHANG Dan-ju, ZHANG Jian   

  1. Institute of Ecological Forestry, Sichuan Provincial Key Laboratory of Ecological Forestry Engineering, Sichuan Agricultural University, Wenjiang 611130, Sichuan, China
  • Received:2011-10-31 Online:2011-12-31 Published:2017-04-12

摘要: 为了解巨桉人工林对土壤生态过程的影响,研究了1~10a生巨桉人工林林下土壤微生物数量及其生物量。结果显示,土壤细菌在土壤微生物类群中占绝对优势,放线菌次之、真菌数量最低,土壤细菌、放线菌、真菌、及微生物总数随土层加深而降低,偶尔出现逆向分布;各微生物类群及微生物数量呈现1~4a降低,而后显著增加。土壤微生物多样性指数,Pielou和Shannon-wiener指数轮伐期前(1~3或4a)有波动的增加,而后随林龄逐渐减小;Simpson指数呈相反趋势。

关键词: 巨桉人工林, 年龄系列, 土壤微生物数量, 生物多样性

Abstract: In order to clearly understand the effects of eucalypt(Eucalyptus grandis) on soil ecological processes, soil microbial counts and microbial biomass were investigated in the Eucalyptus grandis plantations with a range of ages from 1 to 10 years.Bacteria quantitatively dominated the soil microbe community in eucalypt plantations regardless of plantation ages, followed by actinomycete and fungi.Microbial counts decreased with soil depths except for the converse distribution in certain stands.The microbial counts decreased in eucalypt plantations from 1 to 4 years, and then increased with the increase of plantation age.Shannon-wiener index and Pielou index increased in the first 3 or 4 years and then decrease with the increase of plantation age, but Simpson index showed an opposite trend.

Key words: Eucalyptus grandis, plantation age, soil microbes, biodiversity

中图分类号: 

  • S718.52+1.3