常绿阔叶林与杉木林的土壤碳矿化潜力及其对土壤活性有机碳的影响

生态学杂志

常绿阔叶林与杉木林的土壤碳矿化潜力及其对土壤活性有机碳的影响

王清奎^{1, 2};汪思龙^{1, 2};于小军¹;张剑^{1, 3};刘燕新^{1, 3}

¹湖南会同森林生态系统国家野外科学观测研究站，湖南会同 418307; ²中国科学院沈阳应用生态研究所会同森林生态实验站，沈阳 110016; ³中国科学院研究生院，北京 100039

收稿日期:2007-01-25 修回日期:1900-01-01 出版日期:2007-12-10 发布日期:2007-12-10

Soil carbon mineralization potential and its effect on soil active organic carbon in evergreen broadleaved forest and Chinese fir plantation

WANG Qing-kui^1,2; WANG Si-long^1,2; YU Xiao-jun¹; ZHANG Jian^1,3; LIU Yan-xin^1,3

¹Huitong National Research Station of Forest Ecosystem, Huitong 418307, Hunan, China;²Huitong Experimental Station of Forest Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China;³Graduate University of Chinese Academy of Sciences, Beijing 100039, China

Received:2007-01-25 Revised:1900-01-01 Online:2007-12-10 Published:2007-12-10

摘要/Abstract

摘要： 采用室内土壤培养法，比较分析了湖南省会同地区常绿阔叶林、杉木纯林土壤有机碳的矿化速率和累计矿化量，分析了有机碳矿化量与土壤活性有机碳初始含量的关系。结果表明：常绿阔叶林土壤有机碳矿化速率和累计矿化量均显著高于杉木纯林。在培养的第21天，在培养温度为9 ℃和28 ℃条件下，常绿阔叶林0～10和10～20 cm土层的土壤有机碳累计矿化量为杉木纯林的1.7～2.7倍。常绿阔叶林土壤有机碳矿化释放的CO2-C分配比例高于杉木纯林。林地土壤有机碳矿化量受土壤微生物碳、可溶性有机碳初始含量的影响（P<0.01）。土壤有机碳矿化使土壤微生物碳增加而可溶性有机碳下降，但变化幅度均不大。温度从9 ℃升高到28 ℃后，林地土壤有机碳矿化速率提高3.1～4.5倍; 2林地有机碳矿化对温度的敏感性无显著差异。

关键词: 棕榈蓟马, 种群增长, 空间分布, 抽样技术

Abstract: With incubation test, this paper studied the mineralization rate and cumulative mineralized amount of soil organic carbon (C), and the correlations of the mineralized organic C with the initial content of soil active organic C in evergreen broadleaved forest and Chinese fir (Cunninghamia lanceolata) plantation in Huitong region of Hunan Province. The results showed that the mineralization rate and cumulative mineralized amount of soil organic C were significantly higher in evergreen broadleaved forest than in Chinese fir plantation. At the 21st day of incubation at 9 ℃ and 28 ℃, the cumulative mineralized amount of soil organic C at the soil depths of 0-10 cm and 10-20 cm in evergreen broadleaved forest was 1.7-2.7 times of that in Chinese fir plantation. The proportion of CO₂-C released from the mineralization of soil organic C was higher in evergreen broadleaved forest than in Chinese fir plantation. There were significant correlations between the mineralized amount of soil organic C and the initial content of soil dissolved organic C and microbial biomass C (P<0.01). The mineralization of soil C increased soil microbial biomass C while decreased soil dissolved organic C, but the increment or decrement was not too great. When the incubation temperature raised from 9 ℃ to 28 ℃, soil C mineralization rate increased 3.1-4.5 times, and less difference was observed in the responses of the mineralization rate to temperature change between broadleaved forest and Chinese fir plantation.

Key words: Thrips palmi, Population growth, Distribution pattern, Sampling technique

王清奎;汪思龙;于小军;张剑^{1, 3};刘燕新^{1, 3}. 常绿阔叶林与杉木林的土壤碳矿化潜力及其对土壤活性有机碳的影响[J]. 生态学杂志.

WANG Qing-kui^1,2; WANG Si-long^1,2; YU Xiao-jun¹; ZHANG Jian^1,3; LIU Yan-xin^1,3 . Soil carbon mineralization potential and its effect on soil active organic carbon in evergreen broadleaved forest and Chinese fir plantation[J]. cje.

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