| 杉木根系和凋落物对土壤微生物学性质的影响 |
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| 引用本文： | 张伟东,汪思龙,颜绍馗,杨会侠,徐广标. 杉木根系和凋落物对土壤微生物学性质的影响[J]. 应用生态学报, 2009, 20(10): 2345-2350 |
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| 作者姓名： | 张伟东 汪思龙 颜绍馗 杨会侠 徐广标 |
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| 作者单位： | 1.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;2.中国科学院研究生院, 北京 100049 |
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| 基金项目： | 中国科学院知识创新工程重要方向性项目 |
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| 摘 要： | 通过模拟试验，研究了杉木根系和凋落物及其交互作用对土壤微生物学性质的影响.结果表明：杉木根系和凋落物在土壤生态过程中发挥的作用有所不同.与对照相比，杉木根系处理的土壤微生物生物量碳（MBC）、土壤基础呼吸、土壤有机碳（TOC）和微生物熵显著增加，土壤呼吸熵（qCO2）显著降低（P<0.05）；凋落物处理中，仅土壤基础呼吸和qCO2显著降低（P<0.05），而MBC、TOC和微生物熵没有显著变化（P>0.05）.杉木根系和凋落物对土壤基础呼吸和qCO2的影响具有显著的交互作用.qCO2与土壤可溶性碳（R2=0.325）及TOC（R2=0.209）含量呈显著正相关，说明微生物对碳的利用效率随土壤有机碳数量的增加而降低.与凋落物相比，杉木根系在土壤生态过程中发挥着更重要的作用.
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| 关 键 词： | 杉木 根系 凋落物 微生物碳 土壤呼吸熵 土壤总有机碳 樟树人工林 林下植被抚育 活性有机碳 轻组有机质 |
Effects of root system and litter of Chinese fir on soil microbial properties |
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| ZHANG Wei-dong,WANG Si-long,YAN Shao-kui,YANG Hui-xia,XU Guang-biao. Effects of root system and litter of Chinese fir on soil microbial properties[J]. The journal of applied ecology, 2009, 20(10): 2345-2350 |
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| Authors: | ZHANG Wei-dong WANG Si-long YAN Shao-kui YANG Hui-xia XU Guang-biao |
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| Affiliation: | 1.Huitong Experimental Station of Forest Ecology, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, China|;2.Graduate University of Chinese Academy of Sciences, Beijing 100049, China |
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| Abstract: | A simulation test was conducted to study the effects of the root system and litter of Chinese fir (Cunninghamia lancceolata) on soil microbial pro
perties. After the amendment with C. lancceolata root system, the soil microbial biomass C, basal respiration, total organic C, and microbial quotient increased significantly (P<0.05), while soil metabolic quotient (qCO2) presented an opposite trend. In the treatment amended with C. lancceolata litter, the soil basal respiration and qCO2 decreased significantly (P<0.05), whereas soil microbial biomass C, total organic C, and microbial quotient had less change. A significant interaction between C. lancceolata root system and litter was observed on soil basal respiration and qCO2. The qCO2 had significant positive correlations with soil total organic C (R2=0.209) and dissolved organic C (R2=0.325), suggesting that the C use efficiency of soil microbes decreased with increasing soil organic C content. Comparing with litter, the root system of C. lancceolata played more important roles in soil ecological processes. |
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| Keywords: | Chinese fir root system litter microbial biomass carbon soil metabolic quotient soil organic C |
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