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Influence of moisture loss during storage on new growth of conifer seedlings


Influence of moisture loss during storage on new growth of conifer seedlings



Journal of Environmental Horticulture 9(2): 92-96



ISSN/ISBN: 0738-2898

The relationship between moisture loss from bare-root 2-year-old seedlings of Colorado spruce (Picea pungens var. glauca Engelm.) and percent survival and performance after extended storage at 0.degree. C (32.degree. F) was investigated. Moisture loss was examined by percent weight loss and moisture content (g H2Og FW) during postharvest handling and storage. To generate different levels of moisture loss, seedlings were stored in various packages that differed in water permeability with a 0 and 1 day delay at 20.degree. C (68.degree. F) prior to 5 or 7 months of storage at 0.degree. C (32.degree. F). Depending on treatment, percent weight loss of seedlings varied from 0 to 60% and seedling survival ranged from 0 to 100%. When percent weight loss was below 25% all bare-root seedlings survived 5 and 7 months storage. Seedlings expressed a great degree of tolerance to desiccation stress, as demonstrated by those few which survived nearly 60% weight loss. Between 20 and 40% weight loss there was no direct relationship between moisture loss and percent survival. Bare-root Colorado Spruce seedlings grew with 100% survival following 5 and 7 months storage at 0.degree. C (32.degree. F) if packaged in their unsealed perforated or nonperforated polyethylene film.

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Accession: 002137738

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Related references

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