【摘 要】
：
Daxingan Mountain is the main distribution area of forests in north China.It is also the area where forest fires happen frequently.The study of the effect of fire disturbance on short-term soil respir
【机 构】
：
College of Forestry,Northeast Forestry University,Harbin 150040,China
【出 处】
：
International Symposium on Forest Soils(2013年森林土壤国际研讨会)
论文部分内容阅读
Daxingan Mountain is the main distribution area of forests in north China.It is also the area where forest fires happen frequently.The study of the effect of fire disturbance on short-term soil respiration of the typical forests of this area(Betula platyphylla Suk.forest,Larix gmelinii Rupr.forest)is important for understanding the function of fire disturbance in carbon cycle and carbon balance of forest ecosystem.The results showed that the soil respiration rate of the post-fire plots of Betula platyphylla Suk.forest and Larix gmelinii Rupr.forest was reduced by 14%and 10%respectively,as compared with the control plots.There was no significant difference in the soil heterotrophic respiration rate for the two forest types between the post-fire plot and control plot.The RC values of the post-fire plots of the two forests were reduced significantly in comparison to the control plot.The proportion of variation of soil respiration rate that could be explained by the soil temperature(T)and soil water content(W)at a depth of 5cm in logarithmic model was 70.8%-83.1%for the control plot of Betula platyphylla Suk.forest,62.6%-86.2%for post-fire plot of Betula platyphylla Suk.forest,73.5%-83.7%for the control plot of Larix gmelinii Rupr.forest,and 87.2%-88.7%for the post-fire plot of Larix gmelinii Rupr.forest.The short-term Q1O values of the control plot of Betula platyphylla Suk.forest,the post-fire plot of Betula platyphylla Suk.forest.the control plot of Larix gmelinii Rupr.forest,and the post-fire plot of Larix gmelinii Rupr.forest were 5.33,5,9.12 and 5.26 respectively.The result of our study provided data basis for the research of the effect of fire disturbance on soil carbon balance and the estimation of soil carbon flux.
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