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| 退化喀斯特植被恢复过程中土壤微生物活性研究——以贵州花江地区为例 | |
| 引用本文： | 魏媛,喻理飞,张金池.退化喀斯特植被恢复过程中土壤微生物活性研究——以贵州花江地区为例[J].中国岩溶,2008,27(1):63-67. |
| 作者姓名： | 魏媛 喻理飞 张金池 |
| 作者单位： | 1. 贵州大学林学院,贵州,贵阳,550025;南京林业大学森林资源与环境学院,江苏,南京,210037 2. 贵州大学林学院,贵州,贵阳,550025 3. 南京林业大学森林资源与环境学院,江苏,南京,210037 |
| 基金项目： | 国家重点基础研究发展计划(973计划) , 国家科技支撑计划 , 贵州省优秀科技青年人才计划项目 , 教育部科学技术研究重点项目 |
| 摘 要： | 退化喀斯特植被的恢复机理一直是近年来土壤学和生态学研究的热点。通过分析退化喀斯特植被恢复过程中土壤微生物数量、土壤生化作用强度、土壤微生物生物量，研究了贵州花江喀斯特高原生态综合治理示范区内土壤微生物活性的变化。结果表明：退化喀斯特植被恢复过程中土壤的微生物活性存在较大差异。随着退化喀斯特植被的恢复，土壤细菌、真菌、放线菌三大微生物数量及微生物总数明显上升，表现为乔木群落阶段〉灌木群落阶段〉草本群落阶段〉裸地阶段，且细菌较真菌和放线菌相比占绝对优势，其在微生物总数中分别占95．95％，93．49％，92．32％和92．48％；各主要生理类群的数量呈上升趋势，且氨化细菌〉固氮菌〉纤维素分解菌〉硝化细菌，土壤生化作用强度增强；土壤微生物生物量碳明显增加，微生物生物量碳与土壤有机碳（P〈0．01）呈显著正相关关系。土壤微生物是表征退化喀斯特植被恢复过程中土壤质量的重要特征之一，反映出随着退化喀斯特植被的恢复土壤质量也在逐渐恢复。 |
| 关 键 词： | 退化喀斯特植被 恢复过程 土壤微生物 贵州花江 |
| 文章编号： | 1001-4810(2008)01-0063-05 |
| 收稿时间： | 2007/7/17 0:00:00 |
| 修稿时间： | 2007年7月17日 |
Soil microbial activities during regeneration of the degraded karst vegetation -- A case study at Huajiang, Guizhou |
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| WEI Yuan,YU Li-fei and ZHANG Jin-chi.Soil microbial activities during regeneration of the degraded karst vegetation -- A case study at Huajiang, Guizhou[J].Carsologica Sinica,2008,27(1):63-67. | |
| Authors: | WEI Yuan YU Li-fei and ZHANG Jin-chi |
| Institution: | College of Forestry, Guizhou University;College of Forest and Environment;College of Forestry, Guizhou University;College of Forest and Environment, Nanjing Forestry University, |
| Abstract: | The regeneration mechanism of the degraded karst vegetation has been the research focus of soil science and ecology in China for the last decade. The amount of soil microbes, soil biochemical function and soil microbial biomass are analyzed during restoration of the degraded karst vegetation and the change of soil microbial activities was studied on ecological synthesis control demonstrated area in Huajiang karst plateau, Guizhou. The results showed that,with degraded karst vegetation restoration, the amount of bacteria, fungi, antinomies and total microbial amount ascend obviously, performing bare land stag〉herbaceous community stag 〉shrubby community stag 〉 arboreal community stag. Compared with the fungi and antinomies, the bacterium is dominant and the proportion is 95. 95%, 93. 49%, 92. 32% and 92. 48% in microbial amount. The amount of major physiological group are increasing, ammoniating bacteria〉nitrifying bacteria 〉cellulose decomposing microbes〉 nitrogen-fixing bacteria. Soil biochemical function, including ammonification, nitrification, cellulose decomposition, respiration and nitrogen fixation are increasing. The soil microbial biomass C ascended significantly. There is a significant positive relationship between soil microbial biomass C and organic C （P〈0.01）. Soil microbes are recommended as one of major characteristics of soil quality during degraded karst vegetation restoration. It reflects that soil quality is restoring gradually with degraded karst vegetation succession. |
| Keywords: | degraded karst vegetation restoration processes soil-microorganisms Huajiang Guizhou |
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