Preliminary study on the influence of organic fertilization and mulching on the growth of one-year old Scots pine (Pinus sylvestris L.) seedlings and occurrence of soil mites under micro-sprinkler irrigation in two differ-ent sylvan-natural regions of Poland

The aim of the study was to determine the influence of mulching and organic fertilization on the seedling vigour of Scots pine and occurrence of soil mites (Acari) in forest- and post-arable soils. Two different field experiments were carried out in the vegetation period of the year 2005 on light soils at two different sylvan-natural regions. The first trial was conducted at Białe Błota near Bydgoszcz – on a brown podzolic soil. The second experiment – at Lipnik near Stargard Szczeciński – on an acid brown soil. The experiments were run in a split-plot system with four replications. Two different factors were compared. The first row factor was fertilization, used in the two following treatments: N1 – treated sewage sludge (⅔) + bark (⅓) and N2 – treated sewage sludge (⅔) + sawdust (⅓). The second row factor was mulching, used in the two variants: C – without mulching (control) and S – mulching with litter. Scots pine seedlings grown on the forest soil at Białe Błota were characterized by increased height than those cultivated on the post-arable land at Lipnik. The best results, both on the forest soil as well as on the post-arable ground, were obtained in the ...

Preliminary results of studies on the effects of organic fertilization and mulching on the growth of one-year old european larch (Larix decidua mill.) seedlings and occurrence of soil mites under micro-sprinkler irrigation in two sylvan-natural regions of Poland

The aim of the study was to determine the influence of organic fertilization and mulching on the seedling vigour of European larch (Larix decidua Mill.) and occurrence of soil mites (Acari) in forest- and post-arable soils. Two different nursery experiments were carried out in the vegetation period of the year 2005 on light soils at two sylvan-natural regions of Poland. The first trial was conducted at Białe Błota near Bydgoszcz – on a brown podzolic soil. The second experiment – at Lipnik near Stargard Szczeciński – on an acid brown soil. The higher was the rainfall amount during the vegetation period, the lower was the seasonal irrigation rate supplied to European larch seedlings. Because of this the seasonal irrigation water rate applied at Białe Błota was higher than that at Lipnik. European larch seedlings grown on the forest soil were characterized by the increased height and the fresh mass than those cultivated on the post-arable ground. Seedlings grown in the forest soil on treatments mulched with litter were characterized by the increased height and the fresh mass of above-ground parts as compared to those cultivated on control plots (without mulching). Mulching with litter increased the number of mites, especially oribatid ...