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    沈颖, 秦涛, 郭银花, 张欢, 周志勇. 林火对山西太岳山油松林土壤微生物−酶活性的短期影响[J]. 北京林业大学学报, 2022, 44(4): 76-85. DOI: 10.12171/j.1000-1522.20210042
    引用本文: 沈颖, 秦涛, 郭银花, 张欢, 周志勇. 林火对山西太岳山油松林土壤微生物−酶活性的短期影响[J]. 北京林业大学学报, 2022, 44(4): 76-85. DOI: 10.12171/j.1000-1522.20210042
    shu
    Shen Ying, Qin Tao, Guo Yinhua, Zhang Huan, Zhou Zhiyong. Short-term effects of forest fire on soil microorganism and enzyme activities of Pinus tabuliformis forest in Taiyue Mountain, Shanxi Province of northern China[J]. Journal of Beijing Forestry University, 2022, 44(4): 76-85. DOI: 10.12171/j.1000-1522.20210042
    Citation: Shen Ying, Qin Tao, Guo Yinhua, Zhang Huan, Zhou Zhiyong. Short-term effects of forest fire on soil microorganism and enzyme activities of Pinus tabuliformis forest in Taiyue Mountain, Shanxi Province of northern China[J]. Journal of Beijing Forestry University, 2022, 44(4): 76-85. DOI: 10.12171/j.1000-1522.20210042
    shu

    林火对山西太岳山油松林土壤微生物−酶活性的短期影响

    Short-term effects of forest fire on soil microorganism and enzyme activities of Pinus tabuliformis forest in Taiyue Mountain, Shanxi Province of northern China

      摘要
    • 摘要:
        目的  森林火灾发生后森林生态系统功能的恢复既依赖于林火发生的时间，也取决于林火的类型和强度。在林火干扰后较短时间内研究不同类型火烧迹地的土壤生化特性，对理解地上群落的构建具有重要的生态学意义。
        方法  在火灾发生1个月后，分别在林冠火和地表火迹地，按0 ~ 5 cm和5 ~ 10 cm钻取了土壤样品，测定土壤基础呼吸、微生物生物量、土壤酶活性以及理化性状等指标，并估算了土壤微生物的代谢熵。
        结果  森林火灾对0 ~ 5 cm的土壤性状具有较大影响。林冠火相比于地表火导致土壤养分有不同程度的增加，并提高了土壤基础呼吸（3.85%）及土壤呼吸速率（47.67%），同时也增加了胞外酶的活性；但显著降低了含水量（21.95%）及微生物生物量碳（27.98%）、氮（9.65%）。统计分析结果显示，森林火灾通过改变土壤养分含量调控了土壤微生物的活性。
        结论  在林火发生后的较短时间内，土壤的养分含量、土壤微生物和胞外酶的活性都维持在较高的水平，尤其在0 ~ 5 cm土层，林冠火的激发作用更强一些；土壤养分与土壤微生物和酶活性之间的正相关关系预示着随火灾发生时间的延长、土壤的理化性状都会得到明显改善。

       

      Abstract:
        Objective  The function restoration of fired forest depends not only on the time of forest fire, but also on the forest fire type and intensity. It has great ecological implications for the reconstruction of forest structure to study soil physicochemical properties in short time period after fire occurrence.
        Method  Soil samples were taken separately during the depth of 0−5 cm and 5−10 cm in the burned area by crown fire and surface fire within one month since the fire occurrence, and then the soils were analyzed for soil microbial biomass, soil enzyme activity, and soil nutrient content. The metabolic entropy of soil microorganisms was estimated based on these analyzed soil properties.
        Result  Forest fire had a great effect on soil biophysical properties at 0−5 cm depth. Compared with forest surface fire, forest crown fire increased soil nutrient content, soil respiration rate (3.85%) and soil extracellular enzyme activities (47.67%), but it decreased the values of soil moisture content (21.95%) and soil microbial biomass carbon (27.98%) and nitrogen (9.65%) content. The result of statistical analysis indicated that forest fire manipulated soil microbial activity via the changed soil nutrient contents.
        Conclusion  Higher values are found in soil nutrient contents, the activities of soil microbial organism and extracellular enzymes in burned sample plots during short time period after forest fire. The crown fire exerts a stronger priming effect on soil biophysical properties especially in soil depth of 0 to 5 cm. The positive correlations of soil nutrient and the activities of soil microbes and enzymes indicate that soil physicochemical properties would get improved with the time of forest fire.

       

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