Seedling Competition and the Distribution of Hordeum jubatum L. Along a Soil Salinity Gradient

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Abstract
The effecs of interspecific competition on the growth of seedlings of the inland halophyte Hordeum jubatum L. were measured. H. jubatum was grown in pure culture and mixed with Atriplex triangularis Willd. under field conditions, and in a replacement series along an artificial salinity gradient. The interpretation of the replacement series was enhanced by the measurement of individual plant response, allowing for a statistical analysis. Competition with A. triangularis significantly inhibited root growth of H. jubatum at salinity levels below its upper physiological limit. The results are placed in the context of recent interpretations of the role of interspecific competition in extreme environments.

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