Experiments were carried out in 2012 at container nursery Bielawy (Forest District Dobrzejewice) in the production cycle of Scots pine seedlings (Pinus sylvestris L.) The height of seedlings ranged from 8.9 to 11.9 cm and the diameter was in the range 2.8-3.7 mm. Single ectomycorrhizas dominatem on roots of seedlings, and they constituted from 45 to 64% of all ectomycorrhizas. General state of mycorrhizae on roots can be considered as fairly balanced. Mean density of mites on examined clods with roots (with or without addition of forest ectohumus) ranged from 3 710 to 16 230 individuals • m-2. The most abundant mites on seed-lings produced with mulching were oribatid mites, and in variants without mulching dominated Actinedida. Non-mulched containers were characterized by occurrence of 2-3 species of oribatid mites, and those with mulching - by 10-14 oribatid species. Oppiella nova was the most abundant oribatid species in the examined material. Tectocepheus velatus was also the important component of Oribatida gatherings. The number of T. velatus was characterized by the upward trend in the cycle of investigation. On the basis of the study, it was found that the containers for production of seedlings with covered root system are characterized by ...
The purpose of the study was to determine the abundance and the compo-sition of the group (Oribatida) in clods of roots of selected tree species - Scots pine, Norway spruce, Silver birch, Littleleaf linden - in the container nursery Bielawy. Field studies were carried out in 15 November 2012 on the open production area. Two samples of substrate (with roots) - from the upper (A) and the lower part (B) - were taken from the each clod. Volume of each sample amounted 50 cm3. Mites were extracted from the material in high gradient Tullgren funnels during 7 days and maintained in 70 % ethanol. Abundance of mites in the layer A ranged from 18.67 to 219.67 individuals · 100 cm-3 of substrate. These arachnids were more abundant in containers with hardwood species than in those with coniferous species. Abundance of mites in the lower layer of the culture media was 40 % lower than that in the layer A. Mites belonging to the orders: Actinedida, Mesostigmata and Oribatida were found in containers of all seedling species, in both layers of substrate. The most abundant were oribatid mites, and - among them - the Acaridida i ...
The aim of the research has been to determine the effect of the inoculum (forest litter containing living edaphon mixed with peat) on selected plant growth parameters of white birch (Betula pendula Roth) seedlings growing with a covered root system, the mycorrhizal status as well as the abundance of the Acari in the root clump. The research was performed in 2013 at the container nursery of Bielawy (53°01'37.3"N 18°42'55.3"E), in the Forest Inspectorate of Dobrzejewice. The experiment started on May 10, seedlings were growing in containers placed on steel pallets in 2 treatments: C -control, L - 10% of additive of inoculate shredded pine forest litter. Seedlings of white birch cultivated in the treatment with addition of litter were significantly higher than those from control treatment. There were no significant differences between the diameter and the fresh mass of the the seedlings in the two treatments. The percentage of vital mycorrhizae increased slightly in the treatment with the addition of litter. The proportion of non-vital mycorrhizas was lower in the control treatment. Our results indicate that forest litter might improve environmental conditions rather by changing moisture-temperature relationships than by changing the availability ...
