毛竹是我国最重要的经济竹种。随着其枝条和木材价值的不断下降以及附属劳动力和生产成本的增加,这些看台中的许多已经被遗弃,导致植被演替的发生。目前,我们对放弃林分后土壤微生物化学计量和熵效应的变化以及相关的失衡的理解是有限的。因此,本研究探讨了三个时间尺度的Ph.杜鹃花放弃(即,0、9和21年)调查土壤微生物碳(C),氮(N),30厘米土壤剖面内的磷(P)动态。结果表明:(1)遗弃后,植被演替显著影响土壤碳(Csoil),氮(Nsoil),和磷(土壤),微生物生物量(Cmic),氮(Nmic),和磷(Pmic),和Csoil:Nsoil:Psoil和Cmic:Nmic:Pmic比率。此外,Csoil,Nsoil,土壤,Cmic,Nmic,放弃后,随着时间的推移,Pmic都显着增加。此外,Csoil:Nsoil,Cmic:Pmic,Nmic:Pmic比率明显增加,而Csoil:Psoil,Nsoil:Psoil,和Cmic:Nmic比率均显着降低。(2)土壤微生物熵氮(qMBN)和Cimb中的土壤微生物失衡:Nimb增加,而土壤微生物熵碳(qMBC)增加,土壤微生物熵磷(qMBP),放弃后,Cimb:Pimb和Nimb:Pimb中的土壤微生物失衡随时间减少。(3)冗余分析(RDA)表明Csoil:Nsoil和Cmic:Pmic是微生物商(qMB)的关键影响因素,解释55.35%和24.39%的变异,分别。放弃后,对土壤的积极或消极演替影响:土壤:土壤,微生物C,N,P化学计量不平衡(CIMB:NIMB:PIMB),和Csoil:Nsoil:Psoil比率对qMB有积极影响。总的来说,这些发现强调了Csoil:Nsoil:Psoil和Cimb:Nimb:Pimb比率在调节Ph后植被演替诱导的qMB中的重要性。杜鹃花遗弃,为植被恢复和竹子混交林的建立提供有价值的信息。
Moso bamboo (Phyllostachys edulis) is China\'s most important economic bamboo species. With a continuous decline in the value of its shoots and timber and an increase in affiliated labor and production costs, many of these stands have been abandoned, resulting in the occurrence of vegetation succession. Currently, our understanding on changes in soil microbial stoichiometric and entropic effects and associated imbalances following stand abandonment is limited. Accordingly, this study explores three timescales of Ph. edulis stand abandonment (i.e., 0, 9, and 21 years) to investigate soil-microbial carbon (C), nitrogen (N), and phosphorus (P) dynamics within a 30 cm soil profile. Results showed that (1) following abandonment, vegetation succession significantly influenced soil carbon (Csoil), nitrogen (Nsoil), and phosphorus (Psoil), microbial biomass (Cmic), nitrogen (Nmic), and phosphorus (Pmic), and Csoil:Nsoil:Psoil and Cmic:Nmic:Pmic ratios. Additionally, Csoil, Nsoil, Psoil, Cmic, Nmic, Pmic all increased significantly over time following abandonment. Moreover, Csoil:Nsoil, Cmic:Pmic, and Nmic:Pmic ratios clearly increased while Csoil:Psoil, Nsoil:Psoil, and Cmic:Nmic ratios all significantly decreased. (2) Soil microbial entropy nitrogen (qMBN) and soil microbial imbalances in Cimb:Nimb increased while soil microbial entropy carbon (qMBC), soil microbial entropy phosphorus (qMBP), and soil microbial imbalances in Cimb:Pimb and Nimb:Pimb decreased over time following abandonment. (3) Redundancy analysis (RDA) indicated that Csoil:Nsoil and Cmic:Pmic ratios were key influencing factors of microbial quotient (qMB), explaining 55.35 % and 24.39 % of variation, respectively. Following abandonment, positive or negative successional impacts on Csoil:Nsoil:Psoil, microbial C, N, P stoichiometric imbalances (Cimb:Nimb:Pimb), and Csoil:Nsoil:Psoil ratios had a positive effect on qMB. Collectively, these findings highlight the importance of Csoil:Nsoil:Psoil and Cimb:Nimb:Pimb ratios in regulating qMB induced by vegetation succession following Ph. edulis abandonment, and provide valuable information for vegetation restoration and establishment of bamboo mixed forest.