高级检索
    吕娇, MustaqShah, 崔义, 徐程扬. 土壤紧实度和凋落物覆盖对城市森林土壤持水、渗水能力的影响[J]. 北京林业大学学报, 2020, 42(8): 102-111. DOI: 10.12171/j.1000-1522.20190476
    引用本文: 吕娇, MustaqShah, 崔义, 徐程扬. 土壤紧实度和凋落物覆盖对城市森林土壤持水、渗水能力的影响[J]. 北京林业大学学报, 2020, 42(8): 102-111. DOI: 10.12171/j.1000-1522.20190476
    Lü Jiao, Mustaq Shah, Cui Yi, Xu Chengyang. Effects of soil compactness and litter covering on soil water holding capacity and water infiltration ability in urban forest[J]. Journal of Beijing Forestry University, 2020, 42(8): 102-111. DOI: 10.12171/j.1000-1522.20190476
    Citation: Lü Jiao, Mustaq Shah, Cui Yi, Xu Chengyang. Effects of soil compactness and litter covering on soil water holding capacity and water infiltration ability in urban forest[J]. Journal of Beijing Forestry University, 2020, 42(8): 102-111. DOI: 10.12171/j.1000-1522.20190476

    土壤紧实度和凋落物覆盖对城市森林土壤持水、渗水能力的影响

    Effects of soil compactness and litter covering on soil water holding capacity and water infiltration ability in urban forest

    • 摘要:
        目的  分析人为干扰对土壤密度、孔隙度、紧实度等物理性质的影响,揭示土壤紧实度、凋落物覆盖决定城市森林土壤的持水和渗水能力,以期为科学管理城市森林凋落物及践踏程度提供科学参考。
        方法  以北京市典型城市森林公园−奥林匹克森林公园内森林为研究对象,通过测定不同践踏等级(轻度、中度、重度)、不同凋落物累积量(0 ~ 4 t/hm2、4 ~ 8 t/hm2、8 ~ 12 t/hm2)、不同草被植物覆盖度(0、0 ~ 50%、50% ~ 100%)下表层土壤持水、渗水相关特性,分析土壤紧实度、凋落物覆盖对土壤持水和渗水能力的影响。
        结果  (1)践踏程度及凋落物累积量不同对土壤持水、渗水能力有显著影响(P < 0.05),草被覆盖度对土壤持水、渗水能力无显著影响(P > 0.05)。土壤通气性、持水能力、渗透能力均随践踏程度减弱显著增加。(2)土壤持水量和土壤渗透速率与土壤孔隙度呈显著正相关,与土壤密度呈显著负相关,表明人为干扰正是通过改变土壤通气紧实程度来影响土壤持水及渗透能力。(3)土壤紧实度增加,城市森林土壤持水和渗水能力显著降低;凋落物累积量增加,土壤持水渗水能力变化不明显。(4)土壤持水能力随着土壤紧实度的减少和凋落物累积量的增加而增强,二者具有协同效应;土壤渗水能力随着土壤紧实度的减少而增加,凋落物覆盖对其影响不大。
        结论  土壤紧实度、凋落物覆盖决定城市森林土壤持水和渗水能力,减轻人为践踏,适当保留凋落物可以提高土壤持水、渗水能力,减少地表径流。

       

      Abstract:
        Objective  This study analyzed the effects of human interference on physical properties such as soil bulk density, porosity, and compactness, and revealed that soil compactness and litter covering determined the soil water holding capacity and water infiltration ability in urban forest, so as to provide reference for scientific management of urban forest litter and trampling intensity.
        Method  Taking forest in the Olympic Forest Park, a typical urban forest park in Beijing, as the research object, we measured the properties of water holding and infiltration in the surface soil layer under human disturbance in terms of different trampling intensities (mild, moderate, severe) , different litter accumulation (0−4 t/ha, 4−8 t/ha, 8−12 t/ha), different coverage of grass plants (0, 0−50%, 50%−100%). And the effects of soil compactness and litter covering on soil water holding capacity and water infiltration ability were analyzed.
        Result  (1) Different trampling intensities and litter accumulation had significant effects on soil water holding capacity (P < 0.05) and water infiltration ability, while grass coverage had no significant effect on both (P > 0.05). With the trampling intensity decreasing, soil aeration, water holding capacity, and infiltration capacity increased significantly. (2) Soil water holding capacity and soil infiltration rate were significantly positively correlated with soil porosity, and significantly negatively correlated with soil bulk density. It indicated that human disturbance affected the water holding and infiltration capacity by changing the degree of soil aeration and compactness. (3) With the increase of soil compactness, water holding capacity and water infiltration ability of urban forest soil decreased significantly; while with the increase of litter accumulation, soil water holding capacity and water infiltration ability changed not obviously. (4) Soil water holding capacity increased with soil compactness decreasing and litter accumulation increasing, both of which had a synergistic effect; soil water infiltration capacity increased with soil compactness decreasing, while litter covering had little effect on it.
        Conclusion  Soil compactness and litter covering determine the soil water holding capacity and water infiltration ability of urban forest soil. Reducing human trampling intensity and proper retention of litter can improve soil water holding capacity and water infiltration ability in urban forest, and then reduce surface runoff.

       

    /

    返回文章
    返回