Effect of soil preparation method on root development of P. sylvestris and P. abies saplings in commercial forest stands
Soil preparation is a common practice that precedes outplanting of Norway spruce (Picea abies) and Scots Pine (Pinus sylvestris) in boreal forests. It has been proven to enhance the survival and early growth of seedlings. Containerized P. abies and P. sylvestris saplings were excavated 1–3 years after outplanting in clear cut forests across Latvia. The excavated saplings were grown in forests that had been prepared either using site mounding or disc trenching soil preparation method. The aim was to determine the effects of soil preparation method used on the root depth, dry mass and orientation. Saplings are forming deeper root system that expand evenly when planted on mounds, yet the root dry mass was not affected by soil preparation method or soil type. Seedlings planted in trenched sites formed two-sided root system, parallel to the furrow. No correlation between roots growing direction and cardinal points was found.
KeywordsMounding Disc trenching Root orientation Forest regeneration
This study was a part of a research project Development of decision support tool for prognosis of storm damages in forest stands on peat soils (No 184.108.40.206/16/A/260) funded by European Regional Development Fund. And we would also like to thank JSC “Latvian State Forests” for funding and access to the used study sites.
- Fox J, Weisberg S (2011) An R companion to applied regression, 2nd edn. Sage, Thousand OaksGoogle Scholar
- Gemmel P, Nilsson U, Welander T (1996) Development of oak and beech seedlings planted under varying shelterwood densities and with different site preparation methods in southern Sweden. New For 12(2):141–161Google Scholar
- Haeussler S (1989) Mounding for site preparation. Topic summary for the operational forest. Queen’s Printer for British Columbia, VictoriaGoogle Scholar
- Mangalis I (1989) Meža kultūras. “Zvaigzne”. p 348Google Scholar
- Örlander G, Gemmel P, Hunt J (1990) Site preparation: a Swedish overview. FRDA Report 105Google Scholar
- Pellikka P, Järvenpää E (2003) Forest stand characteristics and wind and snow induced forest damage in Boreal Forests. In: Proceedings of the international conference on wind effects on trees, University of Karlsruhe, GermanyGoogle Scholar
- Pontey W (1808) The profitable planter: a treatise on the theory and practice of planting forest trees, in every description of soil and situation; more particularly on elevated sites, barren heaths, rocky soils, &c., including directions for the planting and management of permanent screens; with useful hints on shelter and ornament, 2nd ed. Printed for the author by T. Smart, HuddersfieldGoogle Scholar
- R Core Team (2017) R: A language and environment for statistical computing. R Foundation for Statistical Computing, Vienna, AustriaGoogle Scholar
- Zālītis P, Jansons J (2013) Latvijas meža tipoloģija un tāssākotne. Daugavpils Akadēmiskais apgāds “Saule”, p 168Google Scholar