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当前位置: 首页 > 文章 > 冻融作用下黑土有机碳数量变化的研究 农业环境科学学报 2008,27 (03) 154-160
Position: Home > Articles > Effect of Freezing and Thawing on the Content of Organic Carbon of Black Soil Journal of Agro-Environment Science 2008,27 (03) 154-160

冻融作用下黑土有机碳数量变化的研究

作  者：
刘淑霞;王宇;赵兰坡;刘景双;秦治家
单  位：
吉林省东辽县金洲农业站;中国科学院东北地理与农业生态研究所环境室;吉林农业大学资源与环境学院
关键词：
冻融交替;黑土;有机碳总量;水溶性有机碳;微生物量碳;易氧化有机碳
摘  要：
采用田间监测与室内模拟试验相结合的方法,研究了冻融作用对黑土有机碳数量变化的影响。目的在于探讨黑土有机碳变化的机理,为增加土壤有机碳的固定,提高土壤肥力,减少温室气体排放提供理论依据。结果表明,冻融交替对黑土有机碳总量及易氧化有机碳影响不显著,但对水溶性有机碳影响较大。随着冻结温度和冻融频次的增加,土壤水溶性有机碳含量呈显著上升的趋势,而微生物量碳表现为显著下降的趋势。在土壤冻融过程中,土壤原有土壤有机碳的含量对土壤有机碳的影响不大,但新加入的有机物质对其有一定的影响,可增加土壤中水溶性有机碳和易氧化有机碳的含量。
译  名：
Effect of Freezing and Thawing on the Content of Organic Carbon of Black Soil
作  者：
LIU Shu-xia1,WANG Yu1,ZHAO Lan-po1,LIU Jing-shuang2,QIN Zhi-jia3(1.College of Resource and Environmental Science,Jilin Agricultural University,Changchun 130118,China;2.Northeast Institute of Geography and Agricultural Ecology,Chinese Academy of Sciences,Changchun 130021,China;3.Jinzhou Agricultural Station of Dongliao County,Jilin Province,Dongliao 136615,China)
关键词：
alternative freezing and thawing treatment;black soil;total organic carbon;water soluble organic carbon;microbial biomass carbon;easily oxidized organic carbon
摘  要：
In order to investigate the mechanism of organic carbon transformation and provide a theoretical basis for increasing soil organic carbon fixation,improving soil fertility and reducing greenhouse gas emissions,outdoor monitoring and indoor simulating experiments were carried out to study the effects of freezing and thawing treatments on black soil organic carbon.The effects of alternative freezing and thawing treatments on the content of total organic carbon and easily oxidized organic carbon were not significant.With the freezing temperature and freezing and thawing frequency increasing,the content of soil organic carbon decreased by 0.04～0.95 g·kg-1,the content of easily oxidized organic carbon also decreased,with the highest value of oxidizable organic carbon being 1.23 mg·kg-1.However,the correlation analysis showed alternative freezing and thawing treatments had no significant effects on the content of total organic carbon and easily oxidizable organic carbon(P>0.05) but had an obvious effect on the water soluble organic carbon and the content of microbial biomass carbon(P<0.05).With the alterative freezing temperature and freezing and thawing frequency increasing,the contents of water soluble organic carbon increased by 8.61～46.36 mg·kg-1 and 6.21～37.85 mg·kg-1,averaged 26.08 mg·kg-1 and 20.11 mg·kg-1 respectively,but the content of microbial biomass carbon significantly decreased by 73.21～372.71 mg·kg-1 and 10.64～368.12 mg·kg-1,with the average values being 220.91 mg·kg-1 and 133.54 mg·kg-1 respectively.During the processes of soil freezing and thawing,the content of soil original organic carbon had no significant effects on the soil organic carbon,but the application of organic matter had great influence on the content of soil organic carbon and could enhance the content of water soluble organic carbon and easily oxidized organic carbon.

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