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首页> 外文期刊>Pedosphere >Contribution of Root Respiration to Total Soil Respiration in a Betula ermanii-Dark Coniferous Forest Ecotone of the Changbai Mountains, China
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Contribution of Root Respiration to Total Soil Respiration in a Betula ermanii-Dark Coniferous Forest Ecotone of the Changbai Mountains, China

机译：长白山桦－暗针叶林交错带根系呼吸作用对土壤总呼吸作用的贡献

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摘要

Total and root-severed soil respiration rates for five plots set up 50 m apart in a Betula ermanii Cham.-dark coniferous forest ecotone on a north-facing slope of the Changbai Mountains, China, were measured to evaluate the seasonal variations of soil respiration, to assess the effect of soil temperature and water content on soil respiration, and to estimate the relative contributions of root respiration to the total soil respiration. PVC cylinders in each of 5 forest types of a B. ermemii-dark coniferous forest ecotone were used to measure soil respirations both inside and outside of the cylinders. The contribution of roots to the total soil respiration rates ranged from 12.5% to 54.6%. The mean contribution of roots for the different plots varied with the season, increasing from 32.5% on June 26 to 36.6% on August 3 and to 41.8% on October 14. In addition, there existed a significant (P < 0.01) logarithmic relationship between total soil respiration rate and soil temperature at 5 cm soil depth. Also, a similar trend was observed for the soil respiration and soil water content at the surface (0-5 cm) during the same period of time.
机译：在中国长白山北坡的桦木桦-暗针叶林过渡带中，对五个间隔50 m的样地进行了总和根切断土壤呼吸速率的评估，以评估土壤呼吸的季节变化，以评估土壤温度和水分含量对土壤呼吸的影响，并估算根呼吸对土壤总呼吸的相对贡献。在B. ermemii-dark针叶林交错带的5种森林类型中的每一种中，使用PVC圆柱体测量圆柱体内部和外部的土壤呼吸。根对土壤总呼吸速率的贡献范围为12.5％至54.6％。不同地块根的平均贡献随季节而变化，从6月26日的32.5％增加到8月3日的36.6％，再到10月14日的41.8％。此外，两者之间存在显着的（P <0.01）对数关系。 5 cm土壤深度的土壤总呼吸速率和温度。同样，在同一时间段内，土壤呼吸和表层土壤水分含量（0-5厘米）也观察到类似的趋势。

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