【作者】 尤文忠； 张慧东； 邢兆凯； 郭锦山； 颜廷武； 赵刚； 魏文俊；

【Author】 You Wen-zhong Zhang Hui-dong Xing Zhao-kai Guo Jin-shan Yan Ting-wu Zhao Gang Wei Wen-jun(Liaoning Provincial Academy of Forestry,Shenyang,110032)

【机构】 辽宁省林业科学研究院；

【摘要】 本文按照一定生态梯度,选取东北地区不同气候带(寒温带、中温带、中温带-暖温带过渡区)的落叶松林为研究对象,比较分析了3个气候带地区(大兴安岭、帽儿山、冰砬山)土壤呼吸特征及影响因子。研究结果表明:在东北不同类型温带气候区,虽然各落叶松林土壤呼吸速率、土壤呼吸量具有一定的时空差异,但落叶松林生态系统土壤呼吸的日变化特征均表现为单峰形,森林土壤呼吸与表层土壤温度呈幂函数相关关系(R2=0.787-0.832)、与森林表层土壤含水量的相关性均较差,森林土壤温度是影响落叶松林生态系统土壤呼吸的主要因素。生长季期间落叶松林的土壤呼吸量排序为大兴安岭(706gCm-2)>帽儿山(650gCm-2)>冰砬山(478gCm-2),表现为土壤呼吸随着纬度的增加而增加。更多还原

【Abstract】 According to ecological gradients,the larch forest stands of different climatic zones including cold temperate zone,temperate zone,temperate and warm-temperate transition zone in northeast China were selected as research objects.The soil respiration and its influence factors in 3 climatic zones such as Da-xing-an-ling Mountain,Mao-er-shan Mountain,Bing-la Mountain were studied by a comparative analysis.The results showed that there were some temporal and spatial differences in soil respiration and soil respiration rate among different types of temperature larch stands in the northeast China.The daily pattern of soil respiration could be expressed as a one-humped curve for 3 zones of larch stands.The power function correlations(R 2 = 0.787-0.832) were found between soil respiration and soil surface temperature of the larch stands.The correlations between soil respiration and soil moisture were bad.It can be concluded that the soil temperature are the main factor affecting soil respiration.The order of soil respiration of different zones of larch stands was Da-xing-an-ling Mountain(706 g C m-2)> Mao-er-shan Mountain(650 g C m-2)> Bing-la Mountain(478 g C m-2) during the growing season.It was indicted that soil respiration increasing by latitude increases.更多还原