An assessment of ponderosa pine seedlings grown in copper-coated polybags
1997
Dumroese, R.K. | Wenny, D.L.
Ponderosa pine--Pinus ponderosa Dougl. ex Laws.--seedlings grown in copper-treated polybags had heights, root collar diameters, and biomass values that were similar to those of seedlings grown without copper. However, untreated seedlings were characterized by an abundance of spiraling roots concentrated in the bottom of the polybag. These spiraled roots were matted, often very thick, usually devoid of secondary roots, sometimes kinked, and probably accounted for the 33% greater root volume, 32% greater root mass, and significantly lower shoot-root ratio than that of copper-treated seedlings. Copper-treated seedlings produced a much finer, fibrous root system that was well-distributed throughout the polybag.
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