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Russian (Quaker) comfrey, Symphytum peregrinutn

, : Russian (Quaker) comfrey, Symphytum peregrinutn. Forage Notes. 5: 1, 32-3

Russian comfrey grown at Ottawa and cut 4 times/yr yielded 19.3 tons green forage/ac. containing 2.06 tons dry matter, of which 21-22% was crude protein and about 10% crude fibre.

Accession: 014177372

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Related references

Anderson, Sander, 1959: Report on Quaker comfrey or Russian comfrey. Small Stock Mag: 27

Hart R.H.; Thompson A.J.IIi; Elgin J.H.Jr; Mcmurtrey J.E.IIi, 1981: Forage yield and quality of quaker comfrey symphytum uplandicum alfalfa medicago sativa and orchard grass dactylis glomerata. Quaker comfrey (S. .times. uplandicum Nym.) has been promoted for years as a high-yielding protein-rich forage crop. Although considerable research has been done in other countries, almost none has been reported from the USA. Field trials on a Cod...

Anonymous, 1959: Russian comfrey Symphytum peregrinum. Where irrigation or good soil moisture conditions were available, Russian comfrey was useful for cutting and feeding to stock, but trials at Grafton Experiment Farm showed that the plant was not relished by stock for grazing.

Culvenor, C.C.J.; Edgar, J.A.; Frahn, J.L.; Smith, L.W., 1980: The alkaloids of Symphytum X uplandicum (Russian comfrey). Eight pyrrolizidine alkaloids were identified in the leaves of Symphytum X uplandicum. They were echimidine, symphytine, lycopsamine, intermedine and the 4 new alkaloids 7-acetyllycopsamine, 7-acetylintermedine, symlandine (7-angelyl-9-viridiflory...

Culvenor C.C.J.; Edgar J.A.; Frahn J.L.; Smith L.W., 1980: The alkaloids of symphytum uplandicum russian comfrey. Eight pyrrolizidine alkaloids were identified in the leaves of Symphytum .times. uplandicum Nyman [S. officinale .times. S. asperum] (Russian comfrey) [used as a medicinal herb]. They are echimidine, symphytine, lycopsamine, intermedine and 4 new...

Plaskett L.G., 1981: Preparation of protein concentrates from symphytum asperrimum russian comfrey for nonruminant feeds and human foods. Extracts were prepared from fresh Russian comfrey plants by successive extractions with water and NaOH. Almost 55% of crop dry matter and 69% of crop crude protein were extracted. The extracts were then acidified to produce precipitates that conta...

Lee K.S.; Kang C.J.; Han I.K., 1969: Effects of planting density and amount of fertilizer on the growth and yield of russian comfrey d symphytum peregrinum d. Research Reports of the Office of Rural Development (Suweon) 12(4): 83-88

Plaskett, L.G., 1981: The preparation of protein concentrates from Symphytum asperrimum (Donn) (Russian comfrey) for non-ruminant feeds and human foods. About 55% of crop DM and 69% of crude protein (CP) were obtained by extraction of Russian comfrey with water containing Na2S2O5 then with 0.3% NaOH. Addition of HCL gave precipitates with 22% of crop DM and 53% of the protein. This CP had over 90%...

Culvenor C.C.J.; Clarke M.; Edgar J.A.; Frahn J.L.; Jago M.V.; Peterson J.E.; Smith L.W., 1980: Structure and toxicity of the alkaloids of russian comfrey symphytum uplandicum a medicinal herb and item of human diet. Experientia (Basel) 36(4): 377-379

Culvenor, C.C.; Clarke, M.; Edgar, J.A.; Frahn, J.L.; Jago, M.V.; Peterson, J.E.; Smith, L.W., 1980: Structure and toxicity of the alkaloids of Russian comfrey (symphytum x uplandicum Nyman), a medicinal herb and item of human diet. Eight pyrrolizidine alkaloids of hepatotoxic type have been indentified in leaves of Symphytum X uplandicum. The combined alkaloids exhibit chronic hepatotoxicity in rats.