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Pool Sizes and Turnover of Soil Organic Carbon of Farmland Soil in Karst Area of Guilin 被引量:3

Pool Sizes and Turnover of Soil Organic Carbon of Farmland Soil in Karst Area of Guilin
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摘要 The three-pool and first-order model separates the mineralizable organic carbon into active,slow,and passive carbon pools.This paper used the model and decomposition curves of the soil organic carbon to fit the active pool and its decomposition rate,slow pool and its decomposition rate.The results showed that the size of the active pool from different profiles accounted for 2.09%-3.08% of the total soil organic carbon and the mean residue time was 3.57-17.21 days.And the size of the slow pool accounted for 3.19%-43.55% and the mean residue time was 1.12-4.94 years.Acid hydrolysis(6M HCl) was used to fractionate the passive organic carbon,which accounted for 50.83%-94.44% of the total soil organic carbon. The three-pool and first-order model separates the mineralizable organic carbon into active,slow,and passive carbon pools.This paper used the model and decomposition curves of the soil organic carbon to fit the active pool and its decomposition rate,slow pool and its decomposition rate.The results showed that the size of the active pool from different profiles accounted for 2.09%-3.08% of the total soil organic carbon and the mean residue time was 3.57-17.21 days.And the size of the slow pool accounted for 3.19%-43.55% and the mean residue time was 1.12-4.94 years.Acid hydrolysis(6M HCl) was used to fractionate the passive organic carbon,which accounted for 50.83%-94.44% of the total soil organic carbon.
出处 《Journal of Northeast Agricultural University(English Edition)》 CAS 2011年第1期39-45,共7页 东北农业大学学报(英文版)
基金 Supported by the Work Project of China Geological Survey (1212010911062) Guangxi Zhuang Autonomous Region Innovation Project (0842008) National Natural Science Foundation (40872213)
关键词 karst area FARMLAND soil organic carbon pool turnover time karst area, farmland, soil organic carbon pool, turnover time
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