Université de Lorraine, Inra, IAM, F-54000, Nancy, France.
ESALQ, Univ São Paulo, Piracicaba, SP, 3418-900, Brazil.
Microb Ecol. 2019 Aug;78(2):528-533. doi: 10.1007/s00248-018-1298-6. Epub 2018 Nov 29.
Harvest residue management is a key issue for the sustainability of Eucalyptus plantations established on poor soils. Soil microbial communities contribute to soil fertility by the decomposition of the organic matter (OM), but little is known about the effect of whole-tree harvesting (WTH) in comparison to stem only harvesting (SOH) on soil microbial functional diversity in Eucalyptus plantations. We studied the effects of harvest residue management (branches, leaves, bark) of Eucalyptus grandis trees on soil enzymatic activities and community-level physiological profiles in a Brazilian plantation. We measured soil microbial enzymatic activities involved in OM decomposition and we compared the community level physiological profiles (CLPP) of the soil microbes in WTH and SOH plots. WTH decreased enzyme activities and catabolic potential of the soil microbial community. Furthermore, these negative effects on soil functional diversity were mainly observed below the 0-5 cm layer (5-10 and 10-20 cm), suggesting that WTH can be harmful to the soil health in these plantations.
收获物残留管理是在贫瘠土壤上建立桉树人工林可持续性的关键问题。土壤微生物群落通过分解有机物（OM）来促进土壤肥力，但对于全树收获（WTH）与仅树干收获（SOH）相比对桉树人工林土壤微生物功能多样性的影响知之甚少。我们研究了巴西种植园中桉树树木收获物残留管理（树枝、树叶、树皮）对土壤酶活性和群落水平生理特征的影响。我们测量了与 OM 分解有关的土壤微生物酶活性，并比较了 WTH 和 SOH 地块中土壤微生物的群落水平生理特征（CLPP）。WTH 降低了土壤微生物群落的酶活性和代谢潜力。此外，这些对土壤功能多样性的负面影响主要在 0-5cm 层（5-10cm 和 10-20cm）以下观察到，表明 WTH 可能对这些人工林的土壤健康有害。
