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不同二氧化碳浓度条件下红松和长白赤松幼苗根际土壤微生物数量研究

贾夏1,2,3 韩士杰1 周玉梅1 张军辉1 邹春静1   

  1. 1中国科学院沈阳应用生态研究所,沈阳 110016;2长安大学国土资源学院,西安 710064;3中国科学院研究生院,北京 100039
  • 收稿日期:2004-07-06 修回日期:2004-10-02 出版日期:2005-07-18

Effects of elevated CO2 concentration on rhizosphere soil microbes under Pinus koraiensis and Pinus sylvestriformis seedlings

JIA Xia1,2,3,HAN Shijie1,ZHOU Yumei1,ZHANG Junhui1,ZOU Chunjing1   

  1. 1Institute of Applied Ecology,Chinese Academy of Sciences,Shenyang 110016
    ,China;2Territorial Resources college of Changan university,Xian 710064, China;3Graduate Shcool of Chinese Academy of
    Sciences,Beijing 100039, China

  • Received:2004-07-06 Revised:2004-10-02 Online:2005-07-18

摘要: 以连续5年不同CO2 浓度(开顶箱700 μmol·mol-1、500 μmol·mol-1、对照箱和裸地)处理的长白赤松和红松幼苗为研究对象,在2003年7~9月分别对幼苗根际土壤细菌、真菌、放线菌数量进行比较研究.结果表明,高浓度CO2处理对长白赤松幼苗根际土壤细菌数量起显著的(P≤0.001)促进作用,对根际真菌和放线菌数量的促进作用却不明显;对红松来说,除8月份700 μmol·mol-1 CO2处理和7月份500 μmol·mol-1 CO2处理之外,在各月份中受高浓度CO2处理的根际土壤细菌数量均较对照箱和裸地显著增多(P≤0.001),而根际土壤真菌数量变化除9月份(P≤ 0.001)外均不明显,放线菌数量受高浓度CO2的影响亦不明显.

关键词: 玉米, 供硫, 氮, 代谢, N-S交互作用, 根系活性

Abstract: The study showed that under Pinus sylvestriformis seedlings,the amount of rhizosphere soil bacteria,but not fungi and actinomyces,increased significantly (P≤0.001) with CO2 enrichment (700 and 500 μmol·mol-1),and the same (P≤ 0.001) was under Pinus koraiensis seedlings,with the exceptions of 700 μmol CO2·mol-1 in August and 500 μmol CO2·mol-1 in July,compared to the ambient chamber and the ambient in each month.No significant effect of elevated CO2 was found on the amount of rhizosphere soil fungi except in September (P≤0.01),and the response of actinomyces to elevated CO2 was also insignificant.

Key words: Zea mays L., Sulfate supply, Nitrogen, Metabolism, N-S interaction, Roots vigor