The aim of the study was to determine the influence of microirrigation (microjet sprinkling and drip irrigation) and organic fertilization (compost prepared on the base of sewage sludge) on a seedling vigour of one-year and two-year old Scot pine seedlings (Pinus sylvestris L.), cultivated on a post-agricultural ground with the use of zoo-melioration in two different regions. Field experiments were carried out on an experimental field in Kruszyn Krajeński (loose sandy soil of quality class VI) near Bydgoszcz and in Lipnik near Stargard Szczeciński (sandy soil of quality class IVb). The first row factor was irrigation used in three treatments: without irrigation (control), drip irrigation, microjet sprinkling. The second row factor was fertilization, used in two variants: mineral fertilization (standard applied in forest nurseries), organic fertilization (compost). The irrigation significantly increased the height and the diameter of the Scot pine seedlings. There were no significant differences in the characters of the growth between the two irrigation systems. Fertilization of Scot pine seedlings with the compost increased significantly the height of seedlings. Interaction of irrigation with organic fertilization of Scot pine seedling height and diameter was noted. Pine seedlings grown on the plots fertilized with compost under irrigation conditions were characterized ...
The analysis of gatherings for soil mites (Acari) - with special emphasis of oribatid mites (Oribatida) - on post-arable land and forest land in 5-year cul-tivations and 8-year young forest stands of Scots pine and silver birch in Bory Tucholskie forests has been presented in the paper. Soil samples for acarological research were taken in the years 2006 and 2009 - in three seasons for every year: springtime (in mid-May), in summer (the beginning of August) and in autumn (in mid-October). Cultivations on the ferested post-arable land were characterized by lower density of mites than on the restored forest land. The all stands in the young forest stage were characterized by increased abundance of these arthropods. Oribatid mites were the most numerous group: their share in gatherings on post-arable land ranged from 63 to 81%, and on forest land their share was slightly higher - 79-87%. Overall, 39 species of oribatid mites were found on the study area - 25 occurred on post-arable land and 29 on forest land. Species diversity of these mites in cultivation and in the forest soil of young forest stand was considerably higher than that on post-arable land. Aforestation of post-arable land ...
