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Root Competition Between Two Strains of Spinacia Oleracea. I. Pattern and Processes
M. Litav and D. Isti
Journal of Applied Ecology
Vol. 11, No. 3 (Dec., 1974), pp. 1007-1016
Published by: British Ecological Society
Stable URL: http://www.jstor.org/stable/2401760
Page Count: 10
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Competition between two strains of Spinacia oleracea (F1 Selma and Early Hybrid) was studied in pot experiments. It was found that F1 Selma (FS) suppresses Early Hybrid (EH) in mixed-culture, although both attain about the same size when growing in pure culture. It was noted that the competitive effect was due almost entirely to below-ground competition. Its main impact occurred toward the end of the growth period when the bigger FS prevented EH from attaining the increased growth rate of which it was capable when growing in pure culture. Some of the advantage of FS over EH may be due to the former's greater embryonic capital and this advantage could be eliminated by postponing its introduction into the mixture by several days.
Journal of Applied Ecology © 1974 British Ecological Society