There is increasing recognition that plant–soil feedbacks drive species co‐existence; therefore the below‐ground compartment should be better considered in ecological restoration. Addition of carbon is a restoration measure that relies on indirect plant–soil relationships by immobilizing soil nitrogen in microbial biomass to manipulate competitive hierarchies between plant species. The aim of the present work was to evaluate the impact of six years of carbon amendment in old‐field restoration in the long term, 20 years after the first application.

中文翻译：

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再次进行固氮治疗：在老场修复中展现出一种迟钝和暂时的作用

人们越来越认识到植物-土壤的反馈驱动物种共存。因此，在生态修复中应更好地考虑地下室。碳的添加是一种恢复措施，它通过将土壤氮固定在微生物生物量中来操纵植物物种之间的竞争等级，从而依赖于植物与土壤之间的间接关系。本工作的目的是评估从首次应用20年后的长期来看，六年碳修正对旧场修复的影响。