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Home → Publications → Forest Nursery Notes → 2008 Winter Forest Nursery Notes → 2008 Winter Forest Nursery Notes - New Nursery Literature → Growth, Physiology and Leachate Losses in Picea Glauca Seedlings (1+0) Grown in Air-Slit Containers Under Different Irrigation Regimes

Growth, Physiology and Leachate Losses in Picea Glauca Seedlings (1+0) Grown in Air-Slit Containers Under Different Irrigation Regimes

Lamhamedi, M., Lambany, G., Margolis, H., and Renaud, M. Canadian Journal of Forest Research 31:1968-1980. 2001.

In production tunnels, time domain reflectometry (TDR) was used to manage irrigation and leaching by controlling water content in the rhizosphere of air-slit containerized white spruce (Picea glauca (Moench) Voss) seedlings 1+ 0). Seedlings were exposed to four irrigation regimes (v/v : IR-60%. IR-45%, IR-30%, and IR-15%) during the first growing season to assess IR effects on growth, gas exchange, nutrient uptake, carbohydrates, root architecture, and leaching. In the province of Quebec, seedling producers generally maintain a high substrate water content (>50%, v/v) during all growth phases. The accuracy and feasibility of using TDR to decrease irrigation without affecting the material attributes of the seedlings at the end of the first growing season was confirmed. However, seedlings grown under IR-had significantly lower height, root collar diameter, shoot and root dry masses, root surface, root length, net photosynthesis, and nutrient contents than seedlings grown under IR-30%, IR-45%, and IR-60%.


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Author(s): Mohammed S. Lamhamedi, Gil Lambany, Hank A. Margolis, Mario Renaud, Linda Veilleux, Pierre Y. Bernier

Section: Container Production

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