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Mortal response and growth of individual plants in a population of orchard grass dactylis glomerata part 1 influence of emergence time on interference between individuals



Mortal response and growth of individual plants in a population of orchard grass dactylis glomerata part 1 influence of emergence time on interference between individuals



Grassland Science 23(4): 312-318



The effects of density and emergence time on interference between individuals were studied in pure populations of orchardgrass. The increase of dry matter, the elongation of plant height and the multiplication in tillers of each individual were largely suppressed by proximity or density of previously emerged neighbors. The regression coefficient of calculated regression of plant weight on the time from sowing to harvest became slightly larger with time in the highest density, smaller with decreasing density. From the result of the experiment, it was suggested that the 3-dimensional space to be occupied by the individual plant was an important factor for which competition among plants might occur. The experimental results were discussed with reference to the population regulation in a sown grassland as a pure population.

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