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Aims This study aims to test the effects of forest age on soil respiration in poplar ecosystems in northern China and to separate the contributions of root respiration (Rr) and soil microbes to the total soil respiration (Rs). Methods Rs in three poplar forests (5, 10, and 15 years old) were measured using an LI-6400-09 soil chamber connected to an LI-6400 portable infrared gas analyzer during the...
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