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作 者 ：方晰 田大伦

期 刊 ：林业科学 1997年 33卷 zk2期 页码：94-103

关键词：杉木人工林；林地CO2释放量；温室气体；

Keywords:Chinesefir, SoilC02releaserate, Greenhousegas,

摘 要 ：对湖南省会同县杉木人工林3种不同林地类型(未成林造林地、已郁闭林地、采伐迹地)的林地CO₂释放量的动态研究表明：①未成林造林地、采伐迹地CO₂释放量都明显高于已郁闭林地，未成林造林地略高于采伐迹地；②林地CO₂释放量与各层土壤温度、湿度在一定范围内呈线性正相关，与土壤C/N比也有明显的线性正相关；③林地CO₂释放量昼夜变化有一定规律性;④不同处理方式(火烧地、未烧地)的林地CO₂释放量在一定时间范围内有明显差异。

Abstract:The study on the soil C0₂ release from three land types of Chinese fir plantation in Huitong，Hunan showed that：①The soil C0₂ release from the afforested land or the def-forested land is evidently higer than that of the closed woodland，the soil C0₂ release from the afforested land is somewhat higher than that of the deforested land；②The soil C0₂ release is positive linear correlation with the soil temperature and soil moisture at a certain range，and also with the soil C/N ratio；③The soil C0₂ release change with a regular circadian rhythm；④The soil C0₂ release from the defforested lands with differ-ent treatments is evident difference in a certain time lapse．

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