Cultivation of seedlings in trays requires the use of specifically developed substrates. This study presents the results of the analyses of selected physical and mechanical parameters of a peat–perlite substrate, in which seedlings of the Scots pine (Pinus sylvestris L.), Norway spruce (Picea abies (L.) H. Karst), European beech (Fagus sylvatica L.), and pedunculate oak (Quercus robur L.) were grown during a production season. For each species, the substrate parameters changed throughout the production season, substrate dry weight decreased, whereas its compactness increased with time. Independent of the species, the bulk density and total porosity of the substrate changed or deviated from the optimum range, although the values of porosity were close to maximum and those of density were close to the minimum. In certain periods in the V265 trays with beech and oak seedlings, the substrate was characterized by very low water capacity and excessive air capacity. Compactness measured with a cone penetrometer showed, that this parameter might be used for monitoring the substrate properties.

在托盘中种植幼苗需要使用专门开发的基质。这项研究提供了对泥炭-珍珠岩基质的选定物理和机械参数进行分析的结果，其中欧洲云杉的苏格兰松树（Pinus sylvestris L.）的云杉（欧洲云杉（Picea abies（L.）H. Karst））山毛榉（Fagus sylvatica L.）和花梗橡木（Quercus roburL.）在生产季节生长。对于每个物种，底物参数在整个生产季节都会发生变化，底物干重降低，而紧密度则随时间增加。尽管孔隙率值接近最大值而密度值接近最小值，但与物种无关，基质的堆积密度和总孔隙率改变或偏离了最佳范围。在带有山毛榉和栎木幼苗的V265托盘中的某些时期，基材的特征是水容量非常低，空气容量过大。用锥形渗透仪测量的致密性表明，该参数可用于监测基材的性能。