The influence of priming on germination and soil emergence of non-aged and aged annual ryegrass seeds
Annual ryegrass is a cool-season turfgrass used for lawns in Northern areas of the United States. Rapid and uniform germination is one of the most important challenges in establishing lawns. Seed priming with the carrier MicroCel-E has been shown to improve the germination performance. The objective of this research was to determine the effectiveness of priming treatment on germination, seedling emergence, and potential storability of annual ryegrass seeds. The optimum priming ratio was 1 g seed, 0.5 g MicroCel-E, and 2 mL water at 25°C for 4d. Priming slightly increased final germination percentage (from 96 to 100%), significantly decreased mean germination time (MGT), and mean emergence time (MET) compared with nonprimed seeds. Aging stress was induced by storing seeds at high temperature (42°C) and relative humidity (95%) for 0, 10, and 20d. Aging reduced the germination of primed seeds to 10% (10d) and nearly zero (20d) compared with 70% (10d) and 20% (20d) for non-primed seeds.
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Document Type: Research Article
Publication date: April 1, 2010
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