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Adding Clays to Pine bark Potting Substrates

Adding Clays to Pine bark Potting Substrates. Jim Owen, Stu Warren & Ted Bilderback Department of Horticulture Science North Carolina State University. Managing the Container System. SUBSTRATE. Container. FERTILIZER. IRRIGATION.

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Adding Clays to Pine bark Potting Substrates

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  1. Adding Clays to Pine barkPotting Substrates Jim Owen, Stu Warren & Ted Bilderback Department of Horticulture Science North Carolina State University

  2. Managing the Container System SUBSTRATE Container FERTILIZER IRRIGATION

  3. Narrow border/filter strips are helpful, but not letting nutrients out of the pot saves money and protects watersheds

  4. Amending Container Substrate With Clay

  5. Amending Container Substrate With Clay 24/48 4/20

  6. EXPERIMENTAL SUBSTRAES

  7. Root and Shoot Dry Weights

  8. Irrigation Partition Plant Use (Evapotranspiration) Water Applied Leached Irrigation water applied, plant use, water leached (L) over 112 days to maintain a 0.20 leaching fraction for Cotoneaster in pine bark substrates amended with 8% clay

  9. Cumulative Irrigation Applied Cumulative amount of water (L) applied to maintain a 0.2 leaching fraction on Cotoneaster grown in pine bark substrates amended with clay.

  10. Cumulative Phosphorus Loss Cumulative amount of phosphorus lost over 112 days from 3.7 gal containers pine bark substrates amended with clay to grow Cotoneaster while maintaining a 0.2 leaching fraction.

  11. Cumulative Phosphorus Loss Total phosphorous leached (mg) per container over 112 days to maintain a 0.20 leaching fraction while growing Cotoneaster spp. In pine bark substrates amended with 8% clay.

  12. Cumulative Ammonium Loss Cumulative amount of ammonium lost over 112 days from 3.7 gal containers pine bark substrates amended with clay to grow Cotoneaster while maintaining a 0.2 leaching fraction.

  13. Significance to the Industry • 100,000-200,000 gallons of WATER / A bed space • Significant Drought & Water Conservation Impacts • 67% less Phosphate leached from containers • Watershed protection • Equivalent Growth to Pine bark:Sand

  14. Adding Clay to pine bark potting mixes may help keep the Monsters out of irrigation supplies and watershed protection.

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