| 不同土地利用方式下的土壤有机碳对温度变化的响应 |
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| 引用本文： | 吕元春,许鹏程.不同土地利用方式下的土壤有机碳对温度变化的响应[J].安徽农业科学,2012,40(35):17079-17080,17097. |
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| 作者姓名： | 吕元春 许鹏程 |
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| 作者单位： | 福建师范大学地理科学学院,福建福州,350007;福建师范大学地理科学学院,福建福州,350007 |
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| 摘 要： | 目的]探讨不同土地利用方式下土壤有机碳对温度变化的响应。方法]以水稻土和林地2种类型土壤为研究对象,90 d室内恒温(25和35℃)培养,测定土壤有机碳含量。结果]2种类型土壤有机碳随时间的变化可用简单的指数方程来拟合,拟合系数达0.01显著水平。2种类型土壤有机碳的分解速率大小顺序为水稻土>林地。温度每升高10℃,林地和水稻土土壤有机碳的分解速率分别提高1.5和1.6倍。结论]温度升高,促进了土壤有机碳的分解,但利用方式对土壤有机碳的影响并不显著。
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| 关 键 词： | 水稻土 林地土 有机碳 升温 |
Response of Organic Carbon to Temperature Change in Soils under Different Land Use |
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| Institution: | LV Yuan-chun et al(College of Geographical Sciences,Fujian Normal University,Fuzhou,Fujian 350007) |
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| Abstract: | Objective]The study aimed to explore the response of organic carbon to temperature change in soils under different land use.Method] Soil samples(paddy soil and forest soil) collected from Minbei Experiment Station were incubated at 15 ℃ and 25 ℃ for 90 days,and the soil organic carbon was measured.Result]The results indicated that the relationship between soil organic carbon content and incubation time could be modeled by simple exponential equation,and the fitting coefficient reached the significance level of 0.01.As a general trend,the decomposition rates of organic carbon decreased in the order of paddy soil and forest soil.The decomposition rates of organic carbon increased 1.5 and 1.6 times in forest soil and paddy soil due to 10 ℃ increase.Conclusion]This study indicated that temperature increase significantly promoted the decomposition of soil organic carbon,but the land use type had no influence on the decomposition of soil organic carbon. |
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| Keywords: | Paddy soil Forest soil Soil organic carbon Temperature increase |
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