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Forestry 1990 63(1):1-7; doi:10.1093/forestry/63.1.1-a
© 1990 by Institute of Chartered Foresters
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Root System Fibrosity of Sitka Spruce Transplants: Relationship with Root Growth Potential

J. D. DEANS, C. LUNDBERG *, M. G. R. CANNELL, M. B. MURRAY and L. J. SHEPPARD

Institute of Terrestrial Ecology Bush Estate, Penicuik, Midlothian EH26 OQB, Scotland

The survival and growth of transplants is strongly influenced by their ability to produce new roots — reflected in their root growth potential (RGP) in standard conditions. The RGP of 2+1 transplants of Picea sitchensis was shown to be related to their number of fine root apices. Most new roots grew by the elongation of pre-existing fine roots of the third and fourth order. Fine root removal, by rough handling or by cutting off roots, was not compensated for by an increase in either the production of new root apices or in the proportion of pre-existing root apices which regrew. Thus, fine root removal decreased RGP. It is concluded that root fibrosity is important for outplanting success.


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