Íslenskar landbúnaðarrannsóknir - 01.09.1982, Page 68

Íslenskar landbúnaðarrannsóknir - 01.09.1982, Page 68
66 ISLENZKAR LANDBÚNAÐARRANNSÓKNIR LITERATURE CITED Arcker, S., and Detling, J.K. 1982. The effects of defoliation and competition on regrowth of two North American mixed-grass praire grami- noids. Oecologia (submitted). Archer, S., and Tiesgen, L.L. 1980. Growth and physiological responses of tundra plants to defoliation. Arctic and Alpine Reasearch 12:531-552. Archer, S., and Tieszen, L.L. 1982, Responses of an arctic tundra sedge to defoliation. Oecologia (Submitted). Arnalds, A. 1978. Uppskera í beitar-tilraununum. Fjölrit frá Ráðunautafundi B.í. og Rala, 5-9 feb. 1978, 4:329-342. Amalds, A. 1981. Áhrif beitarþunga á uppskeru, gróðurnýtingu og arðsemi sauðljárbeitar. Fjölrit frá Ráðunautafundi B.í. og Rala, 2-6 feb. 1978. 1:21-27. Bliss, L.C. 1962. Adaptations of arctic and alpine plants to environmental conditions. Arctic 15:117-144. Bliss, L.C. 1966. Plant productivity in alpine microenvironments on Mt. Washington, New Hampshire. Ecol. Monogr. 36:123-155. Bliss, L.C. 1970. Primary production within arctic tundra ecosystems. In W.A. Fuller and P.G. Keuan, eds., Productivity and conservation in northern circumpolar lands. Internat. Union Conserv. Natur., Morges, Switzerland, Publ. 16:17-85. Buwai, M., and Trlica, M.J. 1977. Defoliation effects on root weights and total nonstructural carbohydrates of blue grama and western wheatgrass. Crop Sci. 17:15-17. Chapin, F.S. 1977. Nutrient/carbon costs associ- ated with tundra adaptations to a cold, nut- rient-poor environment. In Proceedings of the Circumpolar Conference on Northern Ecology, p. 1183-1194. Natural Resources Council of Canada, Ottawa. Chapin, F.S., and Slack, M. 1979. Effect of defolia- tion upon root growth, phosphate absorption, and respiration in nutrient limited tundra gra- minoids. Oecologia 42:67-79. Collins, D.P., Drennan, M.J., and Flynn, A.J. 1977. Potential of Irish grassland for beef production. In Proceedings of International Meeting on Animal Production from Temperate Grassland, p. 12-19, Dublin Ireland, 145 p. Cook, C.W. 1966. Carbohydrate reserves in plants. Utah Agric. Exp. Stn. Research Series 31. Cook, C.W., and Child, R.D. 1971. Recovery of desert plants in various states ofvigor. J. Range Manage. 24:339-343. Crider, F.S. 1955. Root-growth stoppage resulting from defoliation of grass. United States Depart- ment of Agriculture Technical Bulletin 1102, 23 P- Davidson, J.L., and Milthorpe, F.L. 1966. The effect of defoliation on the carbon balance in Dactylis glomerata. Annals of Botany 30:185—198. Dennis, P.G., and Johnson, P.L. 1970. Shoot and rhizomeroot standing crops of tundra vegetation at Barrow, Alaska. Arctic and Alpine Research 2:253-266. Dennis, J.G., Tieszen, L. L., and Vetter, M. A. 1978. Seasonal dynamics of above and belowground production of vascular plants at Barrow, Alaska. In L. L. Tieszen, ed., Vegetation and production ecology of an Alaskan arctic tundra. Springer-Verlag, New York, p. 113-140. Detling, J.K., Dyer, M. I., and Winn, D. T. 1979. Net photosynthesis, root respiration, and regrowth of Bouteloua gracilis following simulated grazing. Oecologia 41:127-134. Donart, G.B. 1969. Carbohydrate reserves of six mountain range plants as related to growth. Journal of Range Managent 22:411-415. Donart, G.B., and Cook, C. W. 1970. Carbohydrate reserve content of mountain range plants follow- ing defoliation and regrowth. Journal of Range Management 23:15—19. Ellison, L. 1960. Influence of grazing on plant succession of rangelands. Botanical Review 26:1-78. Evans, P.S. 1972. Root growh of Lolium perenne L. III. Investigation of the mechanisms of defolia- tion induced suppression of elongation. New Zealand Journal of Agricultural Research 15:347-355. Fonda, R.W., and Bliss, L. C. 1965. The annual carbohydrate cycle of alpine plants on Mt. Washington, New Hampshire. Bulletin of the Torrey Botanical Club 93:268-277. Graber, L.F., Nelson, N. T., Luekel, W. A., and Albert, W. B. 1927. Organic food reserves in relation to the growth of alfalfa and other perennial herbaceous plants. Wisconsin

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