温度和土地利用变化对土壤有机碳矿化的影响 |
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引用本文: | 刘燕萍,唐英平,卢茜,高人. 温度和土地利用变化对土壤有机碳矿化的影响[J]. 安徽农业科学, 2011, 39(7): 3896+3927-3896,3927 |
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作者姓名: | 刘燕萍 唐英平 卢茜 高人 |
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作者单位: | 福建师范大学地理科学学院,湿润亚热带生态-地理过程省部共建教育部重点实验室,福建,福州,350007 |
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摘 要: | [目的]研究温度和土地利用变化对土壤有机碳矿化的影响。[方法]以水田和林地土壤为研究对象,采用室内培养试验,测定土壤有机碳矿化量。[结果]水田和林地土壤有机碳矿化速率变化趋势均为前期较快,后期稳定。土壤有机碳矿化所释放的CO2-C累积量随着培养温度的升高而显著增加(P〈0.05),温度升高10℃,水田和林地土壤释放的CO2-C累积量分别增加157.8%和135.8%,但林地和水田土壤CO2-C累积量的差异并不明显。[结论]温度对土壤有机碳矿化有明显的影响,而土地利用变化对有机碳矿化没有影响。
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关 键 词: | 温度 土地利用 土壤有机碳 矿化 |
Effects of Temperature and Land Use Change on Soil Organic Carbon Mineralization |
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Affiliation: | LIU Yan-ping et al(Key Laboratory of Humid Subtropical Eco-geographical Process,Ministry of Education,College of Geographical Sciences,Fujian Normal University,Fuzhou,Fujian 350007) |
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Abstract: | [Objective]The research aimed to study the effects of temperature and land use change on soil organic carbon mineralization.[Method] Soil samples collected from the Chinese fir plantation and paddy field were incubated aerobically at 15 ℃ and 25 ℃,and the mineralization of soil organic carbon was measured.[Result]The mineralization rates of soil organic carbon in the Chinese fir soil and paddy soil were generally the highest at the beginning of the incubation,and this was immediately followed by a steady and strong decrease after 112 days.Cumulative mineralized C significantly increased with the temperature increase(P<0.05),and there were 157.8% and 135.8% increase in paddy soil and forest soil due to 10 ℃ increase of temperature.However,there was no significant difference of cumulative mineralized C between paddy soil and forest soil throughout the experimental period.[Conclusion]This study indicated that the temperature had a significant influence on the soil organic carbon mineralization,but the land use change didn't have remarkable influence. |
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Keywords: | Temperature Land use Soil organic carbon Mineralization |
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