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    Author(s): John G. Mexal; Nabil Khadduri
    Date: 2011
    Source: In: Riley, L. E.; Haase, D. L.; Pinto, J. R., tech. coords. National Proceedings: Forest and Conservation Nursery Associations - 2010. Proc. RMRS-P-65. Fort Collins, CO: USDA Forest Service, Rocky Mountain Research Station. p. 98-109.
    Publication Series: Proceedings (P)
    Station: Rocky Mountain Research Station
    PDF: View PDF  (1.14 MB)

    Description

    Water management is one of the most important factors in achieving the target seedling. Water is required for cell growth, nutrient transport, cooling through transpiration, and in small amounts for the photosynthetic reaction. Furthermore, judicious use of limiting water availability during the hardening phase can induce budset and increase seedling cold hardiness. Nursery managers typically measure seedling moisture status with the pressure chamber and medium water status using the block weight method. Newer soil moisture sensors, such as time domain reflectometry (TDR) units, offer increased control over irrigation scheduling. Few growers utilize climatological data to estimate evapotranspiration and schedule irrigation based on demand. An example of how these data can be used is explored, as well as the consequences of inadequate monitoring during the hardening phase. Proper water management will help achieve the target seedling as well as maintain the target seedling during the hardening phase.

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    Citation

    Mexal, John G.; Khadduri, Nabil. 2011. The role of plant water relations in achieving and maintaining the target seedling. In: Riley, L. E.; Haase, D. L.; Pinto, J. R., tech. coords. National Proceedings: Forest and Conservation Nursery Associations - 2010. Proc. RMRS-P-65. Fort Collins, CO: USDA Forest Service, Rocky Mountain Research Station. p. 98-109.

    Keywords

    irrigation scheduling, evapotransipiration, soil moisture, plant water potential

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