The effect of seed size grading on seed use efficiency and height of one-year-old container-grown Scots pine (Pinus sylvestris L.) seedlings
AbstractThe seed of Pinus sylvestris L. originating from natural forest in Voronezh region, Russian Federation, was graded in four classes based on seed diameter size, using the operational equipment of screens with round openings. The ungraded seedlot was used as control. Seedlings were produced in Voronezh containerized forest nursery, from March to September 2015, following the standard procedure for Pinus sylvestris. Seed from each size class, plus control, is sown in containers with 120 cm3 cells, filled with peat-substrate, grown in greenhouse for eight weeks, followed by hardening in growing area until the end of the growing season. The results shows a week positive effect of seed grading on height of one-year old container-grown seedlings, but significant improvement of seed use efficiency by reducing the number of empty cells. Based on results of this study, we can recommend grading of Pinus sylvestris seed on two size classes.
Copyright (c) 2018 Arthur I. Novikov, Vladan Ivetić
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