沿海侵蚀台地不同恢复阶段土壤团聚体组成及其与丛枝菌根真菌的关系
发布时间：2019-01-10 11:38
【摘要】：生态恢复是防治土壤侵蚀、恢复地带性植被并实现可持续发展的重要措施。丛枝菌根真菌能够促进土壤团聚体的形成和稳定,进而改良土壤结构,对退化生态系统的恢复和重建具有重要作用。通过分析小良沿海侵蚀台地不同恢复阶段(裸地—桉树林—阔叶混交林—次生林)土壤团聚体组成、细根生物量、微生物群落结构以及球囊霉素相关土壤蛋白(Glomalin-Related Soil Protein,GRSP)质量分数等指标,探讨沿海侵蚀台地植被恢复过程中土壤团聚体组成及其与丛枝菌根真菌的潜在关系。结果表明,(1)随着植被恢复的进行,土壤大团聚体(粒径2 000μm)含量、土壤结构稳定性指数(平均质量直径,Mean Weight Diameter,MWD)、细根生物量、各微生物生物量以及总GRSP(Total GRSP,T-GRSP)质量分数均有所增加。(2)丛枝菌根真菌生物量与细根生物量、各微生物类群生物量以及T-GRSP质量分数间均呈显著的正相关关系。(3)土壤中细根生物量、各微生物类群生物量以及T-GRSP质量分数与其MWD、大团聚体含量呈显著正相关关系。可见,在植被恢复过程中,丛枝菌根真菌能够促进大团聚体的形成与稳定,进而增强土壤结构稳定性,其机制可能在于丛枝菌根真菌生物量的增加能够促进其分泌更多的GRSP,并提高土壤微生物量和细根生物量。
[Abstract]:Ecological restoration is an important measure to control soil erosion, restore zonal vegetation and realize sustainable development. Arbuscular mycorrhizal fungi can promote the formation and stability of soil aggregates and then improve the soil structure and play an important role in the restoration and reconstruction of degraded ecosystems. The composition of soil aggregates, fine root biomass, microbial community structure and balloon mycin associated soil protein (Glomalin-Related Soil Protein,) in different restoration stages (bare land, eucalyptus forest, broad-leaved mixed forest and secondary forest) of Xiaoliang coastal erosion platform were analyzed by means of soil aggregates, fine root biomass, microbial community structure and balloon mycin associated soil protein (Glomalin-Related Soil Protein,). The composition of soil aggregates and their potential relationship with arbuscular mycorrhizal fungi in the process of vegetation restoration in coastal eroded terraces were studied by GRSP. The results showed that: (1) with vegetation restoration, the content of large aggregates (diameter 2 000 渭 m), the soil structure stability index (, Mean Weight Diameter,MWD) and the biomass of fine roots were increased. The biomass of arbuscular mycorrhizal fungi and fine root biomass increased. There was a significant positive correlation between biomass of each microbial group and T-GRSP content. (3) Fine root biomass of soil, biomass of each microbial group and T-GRSP mass fraction were positively correlated with their MWD,. There was a significant positive correlation between the content of macroaggregates and the content of macroaggregates. It can be seen that arbuscular mycorrhizal fungi can promote the formation and stability of macroaggregates in the process of vegetation restoration, and thus enhance the stability of soil structure. The mechanism may be that the increase of biomass of arbuscular mycorrhizal fungi can promote the secretion of more GRSP, by arbuscular mycorrhizal fungi. Soil microbial biomass and fine root biomass were also increased.
【作者单位】： 中国科学院华南植物园//广东省应用植物学重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(31270499)
【分类号】：S714
本文编号：2406261
[Abstract]:Ecological restoration is an important measure to control soil erosion, restore zonal vegetation and realize sustainable development. Arbuscular mycorrhizal fungi can promote the formation and stability of soil aggregates and then improve the soil structure and play an important role in the restoration and reconstruction of degraded ecosystems. The composition of soil aggregates, fine root biomass, microbial community structure and balloon mycin associated soil protein (Glomalin-Related Soil Protein,) in different restoration stages (bare land, eucalyptus forest, broad-leaved mixed forest and secondary forest) of Xiaoliang coastal erosion platform were analyzed by means of soil aggregates, fine root biomass, microbial community structure and balloon mycin associated soil protein (Glomalin-Related Soil Protein,). The composition of soil aggregates and their potential relationship with arbuscular mycorrhizal fungi in the process of vegetation restoration in coastal eroded terraces were studied by GRSP. The results showed that: (1) with vegetation restoration, the content of large aggregates (diameter 2 000 渭 m), the soil structure stability index (, Mean Weight Diameter,MWD) and the biomass of fine roots were increased. The biomass of arbuscular mycorrhizal fungi and fine root biomass increased. There was a significant positive correlation between biomass of each microbial group and T-GRSP content. (3) Fine root biomass of soil, biomass of each microbial group and T-GRSP mass fraction were positively correlated with their MWD,. There was a significant positive correlation between the content of macroaggregates and the content of macroaggregates. It can be seen that arbuscular mycorrhizal fungi can promote the formation and stability of macroaggregates in the process of vegetation restoration, and thus enhance the stability of soil structure. The mechanism may be that the increase of biomass of arbuscular mycorrhizal fungi can promote the secretion of more GRSP, by arbuscular mycorrhizal fungi. Soil microbial biomass and fine root biomass were also increased.
【作者单位】： 中国科学院华南植物园//广东省应用植物学重点实验室;中国科学院大学;
【基金】：国家自然科学基金项目(31270499)
【分类号】：S714
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