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Seedlings of Artemisia frigida emerged only when soil moisture was above −1·5 MPa and total emergence increased with the total amount of water supplied. Regardless of the watering regime, A. frigida required a minimum of 8–10 days before emerging at 10°C and approximately 60 mm cumulative moisture to reach stable maximum emergence. When precipitation is low more seedlings will emerge if it is concentrated in a few events, while when precipitation increases, emergence will be greater if the intervals between precipitation events are short. A bare soil surface was the most favored seedbed and Selaginella densa inhibited emergence of A. frigida . However, even though few seedlings emerged from S. densa . this seedbed type is ecologically important because of its large coverage in the field. |
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