One-year-old Scots pine seedlings from seeds sorted by size and coat color (empirical data)
The set contains three folders and one Excel file. Two folders show photos of Scots pine seedlings on the 30th, 50th day of growth in a container nursery. The third folder contains photos of seedlings at the end of the first growing season (Spring 2019), made in terms of the same distance from the surface. The Excel spreadsheet contains 10 sheets, numbered from 1 to 10. Each leaf contains a set of seedling height data for the year 2018 - May 25, June 28, July 31, September 03 and root neck height and diameter for Spring 2019. A separate list of meteorological data for 2018 is presented. The book also contains a sheet of soil germination data in containers on the 30th and 50th day after sowing.
Steps to reproduce
Seedlings used in this study were grown in the Voronezh forest nursery between 02nd May 2017 and 23d October 2017 by implementing a standard rotation cycle for the container seedlings of Scots pine (Pinus sylvestris L.). Seeds (harvested from Pavlovsk forestry of Voronezh region, Russia) were divided by the color of the seeds coat, with the help of a photoseparator (Sapsan Series, Smart Grade LLC, Voronezh, Russia), into three seed batches: light (1), brown (2), and dark (3). After that, each seed batch was further divided based on the size – seed diameter, by using a sieve unit (BCC AB, Landskrona, Sweden), into two fractions with the maximum seed size of 2.5 mm (small) and 3.25 mm (large), respectively. The 200 seeds for each fraction were then sown by using an automatic seeding line (BCC AB) in HIKO 12 SS 40-cell containers (BCC AB), filled with peat substrate. Containers were installed in greenhouses with automatic temperature and humidity maintenance. The produced seedlings were planted manually under the sword of Kolesov on 24th October 2017 on the site of the left-bank forestry training Voronezh State University of Forestry and Technologies (coordinates of the nodal point: N 51°49’40.3’ E 39°21’49.7’, altitude 100.8 m asl). After the field planting, the seedlings height (in millimeters) was measured three times during the first growing season (the year 2018 - May 25, June 28, July 31, 03 September and Spring 2019) with a ruler, from the ground to the end of the needles and root collar diameter. The results were processed by mathematical statistics methods and variance analysis.