Universidade Estadual de Santa Cruz - UESC, Departamento de Ciências Biológicas, Ilhéus, BA, Brasil.
Universidade Federal do Sul da Bahia - UFSB, Centro de Formação em Ciências Agroflorestais, Ilhéus, BA, Brasil.
Braz J Biol. 2021 May 28;82:e234018. doi: 10.1590/1519-6984.234018. eCollection 2021.
Root deformation (RD) caused by errors in the pricking out process are irreversible and very difficult to detect in container-grown seedlings at the time of planting in the field. The objective of this study was to evaluate the effects of RD on leaf gas exchange, growth, biomass allocation and mineral nutrition of G. americana seedlings during the recovery phase after soil flooding. Four-months-old seedlings, with and without RD, were flooded for 42 days and their recovery was evaluated 28 days after soil drainage. There were no significant interactions between RD and soil flooding for all leaf gas exchange, growth and mineral nutrition after soil drainage, with the exception of leaf P concentrations. In plants with no RD, the P concentration in leaves of non-flooded plants was significantly higher than that of plants with RD. Soil flooding and RD did not influence leaf or root N concentrations or whole-plant N content. RD increased the K concentration in the roots, but not in the leaves. Changes in the nutrient concentrations in leaves and roots indicate that RD may affect physiological performance of seedlings after planting in the field.
根变形（RD）是由移栽过程中的错误引起的，在田间种植时，在容器中生长的幼苗中是不可逆转的，并且很难检测到。本研究的目的是评估 RD 对水淹恢复阶段后美国山核桃幼苗叶片气体交换、生长、生物量分配和矿物质营养的影响。对有和没有 RD 的四个月大的幼苗进行了 42 天的水淹处理，并在土壤排水后 28 天评估了它们的恢复情况。除了叶片 P 浓度外，RD 和土壤水淹之间在所有叶片气体交换、生长和矿物质营养方面没有显著的相互作用。在没有 RD 的植物中，未受水淹的植物叶片中的 P 浓度明显高于有 RD 的植物。土壤水淹和 RD 不影响叶片或根系 N 浓度或整株 N 含量。RD 增加了根系中的 K 浓度，但没有增加叶片中的 K 浓度。叶片和根系养分浓度的变化表明，RD 可能会影响幼苗在田间种植后的生理性能。
