Failure of black cohosh (Actaea racemosa L.) rhizome transplants: potential causes and forest farming implications

• Published in: Agroforestry systems Vol. 88; no. 5; pp. 815 - 822
• Main Authors: Small, Christine J, Chamberlain, James L, Nuckols, Christopher M
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer-Verlag 01.10.2014; Springer Netherlands; Springer; Springer Nature B.V
• Subjects: Actaea; Actaea racemosa; Agriculture; Agroforestry; Agronomy. Soil science and plant productions; Aquatic plants; belowground biomass; Biological and medical sciences; Biomass; Biomedical and Life Sciences; Deciduous forests; farming systems; Forest farming; Forest products; Forestry; Fundamental and applied biological sciences. Psychology; Fungi; Herbal medicine; Herbs; landowners; leaf area; Life Sciences; nontimber forest products; rhizomes; roots; shade; shoots; Site selection; Soil amendment; soil texture; Sustainability management; North America; Non-timber forest products; Deciduous forest herbs; Fungal root rot; Forest farming; Medicinal plant cultivation; Deciduous forest; Nonwood forest product; Root; Ranunculaceae; Failures; Medicinal plant; Fungus; Dicotyledones; Root rots; Angiospermae; Rhizome; Spermatophyta; Culture; Failure; Agroforestry; Farming
• ISSN: 0167-4366; 1572-9680
• DOI: 10.1007/s10457-014-9727-0

Black cohosh (Actaea racemosa L.) rhizomes are harvested extensively from eastern North American forests and sold worldwide for treatment of menopausal symptoms. While forest farming is encouraged to reduce wild-harvest impacts, little information is available to aid landowners in successfully cultivating black cohosh. This study examined survival and multi-year growth of 200 black cohosh rhizomes collected from an Appalachian deciduous forest and transplanted to a similar forest type. By the second year after transplant, fewer than 40 % of rhizomes produced above-ground growth and mean rhizome biomass declined by more than 50 %. Shoot biomass was the greatest predictor of below-ground biomass; however, leaf area provided a reasonable, non-destructive means of estimating this commercially-important biomass. Our results suggest that pre-transplant rhizome condition is particularly important to transplant success. Low biomass, lack of roots, and fungal infection all were associated with reduced plant survival. Based on this and associated studies, we recommend careful site selection for propagation, including circumneutral or lime-amended soils and light to moderate shading. Well-drained soil appears particularly important to discourage fungal infection. Understanding conditions for successful transplanting of black cohosh rhizomes can improve forest farming and contribute to sustainable management of this and other non-timber forest products.