Comparing Large Bareroot and Container Stock: Water Stress as Influenced by Peat and Soil Water Availability


To evaluate the effect of the rooting media on seedling planting shock in black spruce [Picea mariana (Mill.) BSP], we planted three large seedling stock types (containerized, containerized with washed root system, and bareroot) in pans filled with sand and created two contrasting watering regimes (well-watered and limited water). We measured shoot xylem water potential (x) weekly on seedlings from all treatment combinations during a 10-wk period. Over the entire sampling period, and independent of the watering regime, containerized seedlings with washed-root systems showed similar water potentials to bareroot seedlings. Both types presented more negative values than intact containerized seedlings. Differences in the water status of newly outplanted large containerized and bareroot seedlings seem to result mainly from the effect of the peat-based growing medium on water availability in the rooting zone.
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Publication Tree Planters' Notes
Event 2007
Section 4
Author Jutras, S., Thiffault, N. & Munson, A.D.
Published 2007/02/01
Volume 52
Number 1
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