Results (
Thai) 1:
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A single seed of one of four species was added to three pelletsfrom each microcosm leading to a total of 720 pellets (60microcosms4 seed species3 repetitions). The four specieswere F. lemanii L. (Flem; Poaceae), O. vulgare L. (Ovu; Lamiaceae)and Trifolium repens L. (Trep; Fabaceae), and U. dioica L. (Udi;Urticaceae). All pellets were randomly placed in traysfilled withsterilized soil (100 C, 1 h, repeated after 24) and covered withcheesecloth (c. 77 pellets per tray). Trays were randomly placed ina controlled chamber (24 C, 16/8h, day/night) for three months.Trays were watered every day and randomly moved within thechamber every three days. Germination was monitored every threedays for a month and then once a week. Two months after the startof the experiment, artificial casts wereflattened to facilitate thegermination of seeds that had not germinated. At the end of theexperiment, all seedlings were removed and their shoot, root andtotal biomasses were measured. Seedling relative growth rate(RGR) was calculated as follow: RGR (day1) = (ln(W1)ln(W0))/(T1–T0), where W1 is the seedling weight at the end of theexperiment (mg), W0 is the weight of the introduced seed (mg),T1–T0 is the number of days between the seed germination and theend of the experiment. The shoot:root ratio was calculated.
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