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首页> 外文期刊>Current Science: A Fortnightly Journal of Research >Assessment of soil carbon dioxide efflux and its controlling factors in moist temperate forest of West Himalayas
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Assessment of soil carbon dioxide efflux and its controlling factors in moist temperate forest of West Himalayas

机译：西喜马拉雅潮气森林土壤二氧化碳流出评估及其控制因素

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摘要

In this study, the soil CO2 efflux was measured by closed dynamic system method along with soil and meteorological parameters at 1600, 1700 and 1800 m elevations along different directional-aspects over a period of one year. The annual CO2 efflux rate (F-e) varied from 1.02 to 22.57 mu mol m(-2) sec(-1), which was highest in the rainy season. The annual average F-e was maximum (8.67 mu mol m(-2) sec(-2)) at east facing slope followed by 7.58 and 7.32 mu mol m(-2) sec(-1) at south facing slope and north facing slope respectively. Temperature (T-s), moisture (S-m) and evaporation of soil were found to be significant variables and selected to develop the regression model with R-2 value of 0.85. The effect of soil moisture on F-e above 15 degrees C T-s exhibited a better relationship with R(2 )value of 0.48 and temperature sensitivity (Q10) was found 3.25. This study reveals that the key controlling factors of CO2 efflux rate are soil moisture and soil temperature, which explains 66% variation in soil CO2 efflux.
机译：在这项研究中，通过封闭的动态系统方法测量土壤CO2流出，以及在一年内不同方向的土壤和气象参数。年度二氧化碳排出率（F-E）从1.02到22.57 mm mol m（-2）sec（-1），这在雨季最高。年平台坡度最大（8.67亩Mol M（-2）秒）最大（8.67 mm mol m（-2）sec（-2）），然后在南方斜坡和朝鲜斜坡上的7.58和7.32 mol m（-2）sec（-1）分别。发现温度（T-S），水分（S-M）和土壤的蒸发是显着的变量，并选择开发回归模型，R-2值为0.85。 F-E以上的土壤水分对15摄氏度的影响表现出与R（2）值0.48的r（2）值更好的关系，并发现温度敏感性（Q10）3.25。本研究表明，二氧化碳排出率的关键控制因素是土壤水分和土壤温度，其解释了土壤二氧化碳排出的66％变化。

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