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Chinese Journal of Applied Ecology ›› 2004, Vol. ›› Issue (10): 1842-1846.

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Soil biochemical characters of Pinus koraiensis and Pinus sylvestriformis plantations under different elevated CO2 concentration

JIA Xia1,2, HAN Shijie2, ZHOU Yumei1   

  1. 1. Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;
    2. Graduate School of Chinese Academy of Sciences, Beijing 100039, China
  • Received:2003-11-03 Revised:2004-06-23 Online:2004-10-15

Abstract: The aim of this study was to determine the dynamics of soil microbial biomass C,cellulose decomposition rate and catalase activity in Pinus koraiensis and Pinus sylvestriformis plantations exposed to elevated CO2 (700 mg稬-1 and 500 mg稬-1) during the growth season.The five years results indicated that in Autumn,the soil microbial biomass C of Pinus koraiensis and Pinus sylvestriformis plantations was in the order of ambient CO2-chamber>500 mg稬-1 CO2-chamber >700 mg稬-1 CO2-chamber.The monthly dynamics of cellulose decomposition rate in 5 and 10 cm depth soils showed that for both Pinus sylvestriformis and Pinus koraiensis plantations,it was always higher under 500 mg稬-1 CO2 than under 700 mg稬-1 CO2 in growth season.Between different CO2 concentration treatments,soil catalase activity of Pinus koraiensis and Pinus sylvestriformis plantations displayed a definite pattern of its monthly dynamics.

Key words: CO2 concentration, Soil biochemical characteristics, Soil microbial biomass C, Cellulose decomposition efficiency, Catalase activity

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