Scientia Agricultura Sinica ›› 2011, Vol. 44 ›› Issue (22): 4627-4635.doi: 10.3864/j.issn.0578-1752.2011.22.009

• SOIL & FERTILIZER·WATER-SAVING IRRIGATION·AGROECOLOGY & ENVIRONMENT • Previous Articles     Next Articles

Effect of Elevated Atmospheric CO2 and N Fertilization on Soil Nematode Community in a Rice-Wheat Rotation System

 BAO  Xue-Lian, LI  Qi, LIANG  Wen-Ju, ZHU  Jian-Guo   

  1. 1.中国科学院沈阳应用生态研究所森林与土壤生态国家重点实验室，沈阳 110164
    2.中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室，南京 210008
    3.中国科学院研究生院，北京 100039
  • Received:2010-07-26 Online:2011-11-15 Published:2010-11-23

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Abstract: 【Objective】 The effect of elevated CO2 and N fertilization on the below-ground ecosystem was studied. 【Method】 A study was conducted in the rice-wheat rotational FACE platform in China to quantify the effect of elevated CO2 and N fertilization on soil nematode community.【Result】Thirty-five genera and 15 functional guilds were observed in this system, and Acrobeloides, Eucephalobus, Filenchus and Hirschmanniella were dominant genera. Filenchus and Eucephalobus were sensitive to the treatment of elevated CO2 and N fertilization, respectively. Under the FACE condition, the abundance of total nematodes, functional guilds of Fu2 and Om4 increased significantly. The interactive treatment of elevated CO2 and N fertilization influenced the abundance of Fu2. 【Conclusion】Elevated CO2 and N fertilization resulted in the changes of soil nematode community structure and decomposition pathways. Under the high N conditions (HN), elevated CO2 decreased the channel index (CI), and bacteria dominated decomposition pathway was found in the FACE (HN) treatments in the wheat season. Different N fertilization managements influenced the values of structural index (SI), and the higher SI was observed under the low N condition (LN), which suggested a stable ecologically successional status with less disturbance.

Key words: soil nematodes, FACE, N fertilization, rice-wheat rotation system

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