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应用生态学报 ›› 2004, Vol. ›› Issue (10): 1842-1846.

• 研究论文 • 上一篇    下一篇

不同二氧化碳浓度条件下红松和长白赤松土壤生化特性研究

贾夏1,2, 韩士杰2, 周玉梅1   

  1. 1. 中国科学院沈阳应用生态研究所, 沈阳 110016;
    2. 中国科学院研究生院, 北京 100039
  • 收稿日期:2003-11-03 修回日期:2004-06-23 出版日期:2004-10-15
  • 通讯作者: 韩士杰
  • 基金资助:
    中国科学院知识创新工程重大项目(KZCXISW01);国家重点基础研究发展规划资助项目(2002CB412502)

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

摘要: 以连续年在生长季以不同浓度CO2(700和500μmol·mol-1)处理的长白赤松和红松幼苗为研究对象,进行了土壤微生物生物量C、纤维素分解月动态以及过氧化氢酶活性动态研究.结果表明,在秋季,红松和长白赤松土壤微生物生物量C在不同浓度CO2处理箱的大小顺序均为:对照箱>500μmol·mol-1箱>700μmol·mol-1箱;红松和长白赤松土壤5和10 cm层在不同浓度CO2处理下,其纤维素分解强度的月动态均表现出一定的规律性,且各处理之间在每个月份中也表现出一定的规律性;在生长季,红松和长白赤松土壤纤维素分解强度在5和10 cm层均表现为500μmol·mol-1CO2处理下较700μmol·mol-1 CO2处理下高;红松和长白赤松土壤过氧化氢酶活性在不同浓度CO2处理之间均表现出一定的规律性,且各处理的月动态变化也呈现出一定的规律性.

关键词: CO2浓度, 土壤生化特性, 土壤微生物生物量C, 纤维素分解强度, 过氧化氢酶活性

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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