Innovative aspects of cultivation of large spruce seedlings for reforestation

Abstract

Studies conducted in a forest nursery (Moscow region, Russia) have established the following. Seeds, additionally sorted by size and weight, should be used for the cultivation of large spruce seedlings (Picea abies (L.) H. Karst.). Lightweight seeds must be removed. Only heavy and medium weight seeds should be used for sowing. When sowing, the seeds must be distributed uniformly in the sowing line with the same distance between them. The rate of sowing of spruce seeds should ensure the optimal plant density in the sowing line in the amount of 20-30 pieces per meter. Horizontal pruning of spruce seedling roots must be carried out at a depth of 12-15 cm at the age of three in the second half of July. This enables to form a fibrous root system and developed crown of plants. Innovative technology of cultivation of large spruce seedlings in the sowing section of the nursery enables to get planting material which is similar to transplants.

Annual dynamics of ammonium and nitrate nitrogen content by using capsulated carbamide in cassettes of one-year-old seedlings of Scots Pine (Pinus sylvestris)

“…3 B-D) demonstrate a gradual increase in the content of NH4 + and NO3 -, which leads to a more linear trend form, when the growth rate of hs takes a wave-like shape, reaching a maximum growth rate of 17. At the same time, it is known that nitrogen fertilizers have a positive effect on the increase in the length of needles [32], having a complex effect on the growth and development of seedlings, while comparing the planting material of CRS with an open root system (ORS), Russian authors from the Altai Territory note [33] that the former have a greater survival potential and preservation with a certain granulometric composition and specific physico-chemical properties of soils, as well as when planting seedlings with tillage with the formation of a loosened gap [34].…”