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干燥和重新湿润过程引起土壤CO_2激发释放的模拟研究 预览 被引量:7

Flush of Carbon Dioxide Caused by Soil Drying and Rewetting
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摘要 应用短期培养实验研究了干燥和重新湿润引起的土壤CO2激发释放及其动力学过程。结果表明,不经干燥和重新湿润处理土壤CO2释放速率基本不随时间变化,其CO2释放过程可以用零级反应动力学方程(Y=Kot)描述;干燥和重新湿润处理过程能够引起明显的土壤CO2激发释放,这是干燥和重新湿润引起的土壤呼吸激发效应(一级反应)和土壤基本呼吸(零级反应)相互叠加的结果,可以用两库叠加模型Y=Af+Ao(1-e^kt)很好描述。本实验条件下扰动、干燥和重新湿润引起的蝼土CO2净激发释放量为23.05~59.90mgCO2-c·kg^-1,主要与不同培肥措施长期实施造成的土壤性质和肥力差异,特别是有机质数量和质量的差异有密切关系。 Flush of CO2 and its kinetic courses of drying and rewetting soils were studied in short- time incubation. The results showed that CO2 emission rate in no dried and rewetted soils was not changed with time, and its emission courses could be described by zero- order kinetic equation( Y=k0t) . For the drying and rewetting soils, the CO2 emission showed the typical initial CO2 flush, which can be explained by the additive effects of soil respiration prime effect (first- order) caused by drying and rewetting and the basic soil respiration (zero- order). The flush of CO2 following drying and rewetting soils could be well described by the two- pool modelY=at+ A0(1- e- kt). In shorter- time incubation, the net CO2 flush in different Lou soils caused by disturbance, drying and rewetting varied from 23.05 mg CO2- C· kg- 1 to 59.90 mg CO2- C· kg- 1, and it was correlated tightly with the differences of soil property and fertility, especially the differences of soil organic matter quality and quantity, caused by long- term different fertilization methods.
作者 戴万宏 王益权 黄耀 刘军 DAI Wan hong1,2, WANG Yi quan2, HUANG Yao1, LIU Jun2(1.LAPC, Institute of Atmospheric Physics, the Chinese Academy of Sciences, Beijing 100029,China; 2. College of Resource and Environment, Northwest Sci- Tech. University of Agriculture and Forestry, Yangling 712100,China)
出处 《农业环境科学学报》 CAS CSCD 北大核心 2004年第2期 318-322,共5页 Journal of Agro-Environment Science( J. Agro-Environ. Sci.)
基金 中国科学院知识创新工程重大项目——中国陆地和近海生态系统碳收支研究(KZCX1-SW-01)
关键词 干燥 湿润过程 土壤 C02激发释放 模拟研究 动力学 short- time incubation soil drying and rewetting flush of carbon dioxide kinetics
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参考文献36

  • 1Jenkinson D S, Adams D E, Wild A. Model estimates of CO2. emissions from soil in response to global wanning[J]. Nature, 1991,351:304 -306. 被引量:1
  • 2Raich J W, Schelesinger W H. The global carbon dioxide flux in soil respiration and its relationship to vegetation and climate [ J]. Tellu,1992,44B: 81 - 99. 被引量:1
  • 3Valentini R, Mettencci G, Dolman A J, et al. Respiration as the main determinant of carbon balance in European forests[J]. Nature, 2000,404(6780): 861 - 865. 被引量:1
  • 4Neilson J W, Pepper I L. Soil respiration as an index of soil aeration[J]. Soil Sci Soc Am J, 1990, 54:428 - 432. 被引量:1
  • 5Franzluebbers A J, Haney R L, Honeycutt C W, et al. Flush of carbon dioxide following rewetting of dried soil relates to active organic pools[J]. Soil Sci Soc Am J, 2000, 64:613 - 623. 被引量:1
  • 6Zak D R, Holmoes W E, MacDonald N W, et al. Soil temperature,matric potential, and the kinetics of microbial respiration and nitrogen mineralization[J]. Soil Sci Soc Am J, 1999, 63:575 - 584. 被引量:1
  • 7Pulleman M, Tietema A. Microbial C and N transformations during drying and rewetting of coniferous forest floor material[J]. Soil Biology and Biochemistry, 1999, 31 : 275 - 285. 被引量:1
  • 8Kuzyakov Y, Frledel J K, Stahr K. Review of mechanisms and quantification of priming effects [J ]. Soil Biology and Biochemistry, 2000, 32:1485 - 1498. 被引量:1
  • 9Cabrera M L. Modeling the flush of nitrogen mineralization caused by drying and rewetting soils [J]. Soil Sci Soc Am J, 1993, 57:63 -66. 被引量:1
  • 10Blet - Charaudean C, Muller J, Laudelout H. Kinetics of carbon dioxide evolution in relation to microbial biomass and temperature[J]. Soil Sci Soc Am J, 1990, 54:1324 - 1328. 被引量:1

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