• 责任者：Liao Yan (School of Earth Sciences and Resources ; China University of Geosciences ; Beijing 100083 ; China) ; Yang Zhongfang
• 刊名：Geoscience
• 出版年：2011
• 卷期：25(3)
• 关键词：土地利用调查 ; land use surveys ; 碳循环 ; carbon cycle ; 有机碳 ; organic carbon ; 松嫩平原 ; Songnen Plain
• 页码：p.553-561
• 图表：3 illus., 7 tables, 36 refs.
• 分类号：1800
• issnNo：ISSN1000-8527
• isbnNo：CN11-2035/P

The black soil samples from three different land use types in the Songnen Plain were incubated for 90 days in the laboratory. It was found that after reaching a maximum value at the initial stage, the rates of soil respiration declined continuously and then stabilized. At the four different temperature conditions (5 ℃, 15 ℃, 25 ℃ and 35 ℃), the rates of soil respiration simultaneously increased with increasing temperatures.  The result from the density separation coincides with that from the model fitting, and the proportion of light fraction(active carbon) to total organic carbon was arranged as followed: black soil from the grassland>black soil from dry land>black soil from paddy field, while that of heavy fraction(slow carbon) was the opposite.