The regrowth of the aboveground biomass of certain plant species after complete or partial defoliation in highlands can depend on competition with neighboring plants, as well as on the level of availability of soil resources, primarily mineral nutrients (especially N and P). A 3-year full-factorial experiment on the effect of three defoliation regimes (control and single and double mowing at the soil level per season), enrichment of soil with N and P, and removal of neighboring plants (competition reduction) on the shoot number and aboveground biomass of three plant species (Anemone speciosa, Festuca ovina, and Oxytropis kubanensis) in alpine heaths was carried out (in total, 12 variants in 10 replications). It is shown that the removal of competing vegetation in low-productive communities of alpine heaths does not contribute to the biomass recovery after defoliation, unlike the addition of NP fertilizers. The regrow of a nitrogen-fixing legume did not depend on the availability of soil resources.

中文翻译：

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高山荒地植物再生能力的资源调控：因子试验

在高地完全或部分落叶后，某些植物物种的地上生物量的再生可能取决于与邻近植物的竞争，以及土壤资源的可用性水平，主要是矿物养分（尤其是 N 和 P）。一项为期 3 年的全因子试验，研究了三种落叶制度（每个季节在土壤水平上进行控制和单次和双次割草）、富含氮和磷的土壤以及去除邻近植物（减少竞争）对枝条的影响对高山荒地中三种植物物种（海葵、羊茅和库班棘豆）的数量和地上生物量进行了研究（总共 10 个重复中的 12 个变体）。结果表明，与添加 NP 肥料不同，去除高山荒地低生产力群落中的竞争植被对落叶后的生物量恢复没有贡献。固氮豆科植物的再生并不取决于土壤资源的可用性。