Effects of three different irrigation systems (sprinkler irrigation, micro-jet sprinkling and drip irrigation) on the one-year old verrucose birch production under conditions of zoomelioration, are compared in the paper. Zoomelioration measures consisted in introduction of living edaphon with organic matter of forest soil to the nursery soil. Two-year (2003-2004) field experiments were carried out in forest nursery at Białe Błota, Forest Inspectorate of Bydgoszcz. Investigations were conducted on a brown podzolic soil formed from loose sandy soil. Experiment was established as one-factorial trial in randomized block method with four replications. Studied pressure irrigation systems significantly increased the height and diameter of verrucose birch seedlings grown under conditions of zoomelioration. Increased height of verrucose birch seedlings obtained thanks to irrigation ranged from 76 to 100%. Diameter of seedlings was increased by irrigation in the range 67 – 84%. The lowest relative increases of studied biometric features were found under drip irrigation. On the other hand, this irrigation system was characterized by the most economical of water use as compared to micro-jet sprinkling and sprinkler irrigation. Micro-jet sprinkling was the most advantageous in consideration of both the studied growing vigour features of seedlings. This irrigation method simultaneously secured slightly lower seasonal irrigation ...
The study determined the influence of microirrigation (microjet sprinkling and drip irrigation) and organic fertilization (compost prepared on the base of sewage sludge) on growing vigour and degree of mycorrhiza of Scots pine (Pinus sylvestris L.) seedlings as well as occurrence of soil mites (Acari) after treatment of edafon inoculation. Two-year (2004–2005) field experiments were carried out in forest nursery at Białe Błota, Forest Inspectorate of Bydgoszcz. Investigations were conducted on a brown podzolic soil formed from loose sandy soil. The first order factor was irrigation used in three treatments: without irrigation (control), drip irrigation, microjet sprinkling. The second order factor was fertilization, used in two variants: mineral fertilization (standard applied in forest nurseries), organic fertilization (compost). The plot area was 4 m2 and contained 4 rows (4m length) of Scots pine (Pinus sylvestris L.) seedlings. Total number of plots in each experiment was 24 (3 x 2 x 4). Organic fertilizer was produced on the base of sewage sludge (80%) and highmoor peat (20%). This fertilizer was spread in spring (dose: 100 t · ha-1) and mixed with the topsoil (10 cm deep) before establishing of exact field experiments. Introduction of edaphon consisted in the mixing of topsoil (2 ...
The purpose of the study was to determine the influence of organic fertiliza-tion and mulching on the growth of one-year old Scots pine seedlings (Pinus syl-vestris L.) and biological properties of soils in forest nursery under conditions of micro-sprinkler irrigation. The experiments were carried out in forest nursery Bi-ałe Błota (Forest Inspectorate Bydgoszcz) the rusty soil. Two experiments were conducted: the first one – in 2005, and the second one – in 2006. Both these trials were established as two factorial experiments in split-plot system, in four replica-tions. The first factor was fertilization applied in the two variants: N1 – treated sewage sludge (⅔) + bark (⅓) and N2 – treated sewage sludge (⅔) + sawdust (⅓). The second factor was mulching with fresh cap-humus from the fresh coniferous forest, used in the two variants: S – mulching with litter and C – without mulch-ing (control). The single plot area was m2. Total number of plots in the experiment was 16 (2 investigated factors x 2 variants for a factor x 4 replications). Organic fertilizer was produced on the base of treated sewage sludge (⅔) and Scots pine bark (⅓) or sawdust (⅓). This fertilizer was applied ...
