林地不同厚度土壤表面呼吸通量的试验  

Surface Respiration Flux at Different Forest Soil Thickness

作　　者：孟春[1] 徐辉[1] 屈惠蕾 

机构地区：[1]森林持续经营与环境微生物工程黑龙江省重点实验室(东北林业大学),哈尔滨150040

出　　处：《东北林业大学学报》2015年第2期59-62,共4页Journal of Northeast Forestry University

摘　　要：采用室内培养土壤方法,运用LI-8150测定了3次3昼夜不同厚度土壤表面呼吸通量。结果表明,随土壤厚度的增加,各次试验各时间跨度呼吸通量虽呈增加的趋势,但增加的速率相差很大,没有呈现线形增加的趋势。随观测时间的延续,呼吸通量增速最大值由10到20 cm厚度转变到20到30 cm厚度。呼吸通量的增速决定了各层次厚度呼吸通量的贡献率,各厚度呼吸贡献率与呼吸通量增速的大小具有相同的表现形式。We used indoor incubate soil and Li- 8150 to measure soil respiration flux for three times during three days and nights at different soil thickness. All experiments of each time span respiration flux was an increase trend with soil depth increase,but the increase rate varied widely with nonlinear increase. With a continuous observation time,maximum increase rate of respiration flux changed form 10- 20 cm thickness to 20- 30 cm thickness. Increase rate of respiration flux can determine the contribution of respiration flux at each thickness,and the contribution rate of respiration flux are with the same form.

关 键 词：土壤 厚度 呼吸通量 

分 类 号：S718.516[农业科学—林学]