1 / 12

NC STATE UNIVERSITY

Clay Amended Pine Bark Decreases Water Use and Phosphorus Loss. James Owen Stuart Warren & Ted Bilderback. Department of Horticultural Science. NC STATE UNIVERSITY. Environmental Concerns?. Nutrients Water. The Container System. IRRIGATION. SUBSTRATE. Container. FERTILIZER.

tyrone
Download Presentation

NC STATE UNIVERSITY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Clay Amended Pine Bark Decreases Water Use and Phosphorus Loss James Owen Stuart Warren & Ted Bilderback Department of Horticultural Science NC STATEUNIVERSITY

  2. Environmental Concerns? • Nutrients • Water

  3. The Container System IRRIGATION SUBSTRATE Container FERTILIZER

  4. What Defines Clay Minerals? • Clay Type • Structure • Source • Location • Production • Size • Temperature

  5. What Defines Clay Minerals? • Clay Type • Structure • Source • Location • Production • Size • Temperature

  6. What Defines Clay Minerals? • Clay Type • Structure • Source • Location • Production • Particle Size • Temperature

  7. TREATMENTS 8 PB : 1 Sand 8% Amendment 4-20 Dried 5-20 Calcined 24-48 Dried 24-48 Calcined Materials & Methods • Design • 5 Treatments • 3 Replications • RCBD 24-48 4-20

  8. Materials & Methods • Cotoneaster dammeri • ‘Skogholm’ • 14 - L Container • 17 - 5 - 12 CRF • Spray Stakes

  9. Materials & Methods • DATA • Leachate Vol. Daily • NO3, NH4, P • Irrigation Vol. Weekly • Dry Weight • STATISTICS • ANOVA • Fisher’s Protected LSD • Treatment Contrasts

  10. RESULTS - Cumulative Irrigation Applied 8 Pine Bark : 1 Sand y = 1.83x + 57.82, R2 = 0.99 5-20 Calcined y = 1.64x + 53.13, R2 = 0.98 24-48 Calcined y = 1.49x + 46.01, R2 = 0.98 4-20 Dried (not shown) 24-48 Dried (not shown) 8 Pine Bark : 1 Sand 5/20 Dried 4/20 Calcined 24/48 Dried 24/48 Calcined 8 Pine Bark : 1 Sand 5/20 Dried 4/20 Calcined 24/48 Dried 24/48 Calcined

  11. RESULTS - Cumulative Phosphorus Loss 8 Pine Bark : 1 Sand 5-20 Calcined (not shown) 24-48 Calcined 4-20 Dried (not shown) 24-48 Dried

  12. RESULTS • Equal growth of Cotoneaster among all treatments • Clay Reduced Water Use • 3 to 6 gallons • container-1 • ≥ 100,000 gallons • growing acre-1 • Clay Reduced Nutrient Loss • 28% - 62% phosphorus • 50% ammonium

More Related