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Native Plant Establishment Late Summer Planting Project

Native Plant Establishment Late Summer Planting Project. Background Questions. Timing of winter/fall planting Water needs vs. water use Faster establishment with lower maintenance TRWG-Z over hand-watering. Objectives. Clarify potential benefits of TRWG-Z over hand-watering

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Native Plant Establishment Late Summer Planting Project

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  1. Native Plant EstablishmentLate Summer Planting Project

  2. Background Questions • Timing of winter/fall planting • Water needs vs. water use • Faster establishment with lower maintenance • TRWG-Z over hand-watering

  3. Objectives • Clarify potential benefits of TRWG-Z over hand-watering • Determine if single application ( or12 weeks of continual moisture) could successfully establish plants • Determine if photosynthesis prior to dormant season would have substantial benefit to plant establishment • Define water saving using TRWG-Z

  4. Background – TRWG-Z • TRWG-Z, (carboxymethylcellulose cross-linked polymer) • Potable water • City of Santa Rosa, CA • Zinc Sulfate • essential to many enzyme systems in plants • contributes to production of growth regulators • most available form of zinc to plants • Glacial Acetic Acid • naturally occurring auxin • induce elongation in shoot cells • improve uptake of minerals

  5. Materials & Climate www.accuweather.com/us/ca/santa-rosa/95401/forecast-month.asp • Species • Quercus agrifolia • Quercus lobata • Planting times • August 4, 2009 • September 2, 2009 • October 2,2009 • Container size • D-40 • Climate-Mediterranean

  6. Plots & Watering Methods • Each plot – 32 plants – 10’X18’ • 20 with TRWG-Z -12 hand-watered • August • single application TRWG • Hand-watered : 12 weeks, 2.5 gallon each week • Last hand-watered date was October 7 • September • single application of TRWG-Z • Hand-watered: 12 weeks, 2.5 gallon each week • October • single application of TRWG-Z • Hand-watered: 12 weeks, 2.5 gallon each week (except during active precipitation)

  7. Dry Root Mass Data Collection Quercus agrifolia June 2010 Harvest 10 months after planting • Two Harvests • June 23, 2010 • November 27, 2010 • Three-weeks of drying time • Weighed on calibrated scale

  8. Quercus agrifolia Dry Root Biomass TRWG-Z 15 grams Hand-watered 9 grams Quercus agrifolia Planted August 2009, harvested and weighed June 2010

  9. August Planting-June HarvestDry Root Biomass (g) 10-month old plants

  10. August Planting-June HarvestDry Root Biomass (g)

  11. June Harvest of August, September and October Plantings

  12. August Planting-November HarvestDry Root Biomass (g)

  13. August Planting-November Harvest Dry Root Biomass (g) Left: TRWG-Z 78(g) Right: Hand-watered 37(g) Quercus agrifolia-15 month old plants

  14. Quercus lobataTRWG-Z August 89(g) 15 month old plant September 12 (g) 14 month old plant October 9(g) 13month old plant

  15. August Planting – November Harvest Upper Plant Growth Quercus lobata TRWG-Z left / Hand watered right Quercus agrifolia TRWG-Z left / Hand watered right 42-inches 60-inches 24-inches 36-inches

  16. 2009 Planting Today

  17. November 2012 – Final Comparative Growth

  18. August/September/October Photos taken August 23, 2012

  19. Synopsis: Measurement in Inches

  20. Discussion/ObservationsAdditional root growth on August plants • Late summer planting appears to allow sufficient photosynthesis resulting in ample carbohydrate storage for spring plant growth • Zinc and Glacial Acetic Acid contribute to the production of essential growth over potable water with no nutrients • Using TRWG-Z contributes to overall water efficiency • No plants received water after 12 weeks -1 fatality-continual moisture appears necessary

  21. Water Use Comparison TRWG-Z Hand-water • Per Plant • 2.5 gallons at planting • 1 Quart of TRWG-Z • 12 weeks = 2.75 gallons • Per plant • 2.5 gallons per week for 12 weeks = 30 gallons Water saving per plant: 92%

  22. Why Rethink? • Economics • Water efficiency • Unpredictable weather • Success criteria

  23. References • (1993). Zinc, needed throughout the root zone. Micronutrient news and information, Vol. 13(No. 4). • (1994). Zinc-the most important micronutrient. Micronutrient news and information, Vol. 14(No. 3) • Amrani, M., Westfall, D. G., & Peterson, G. A. (1993). Zinc plant availability as influenced by zinc fertilizer sources and zinc water solubility. Oxford: Clarendon Press. • Arteca, R. N. (1996). Plant growth substances, Principles and applications. New York, NY: Chapman and Hall. • Mordvedt, J. J., Cox, F. R., Shuman, L. M., & Welch, R. M. (1991). Micronutrients in agriculture (2nd ed.). Madison, WI: Soil Science Society of America. • Wheeler, J., PhD, & Peterson, K. (2006). DRiWATER plus, a new product (cross linked carboxymethylocellulose gel with zinc and acetic acid). Tucson, AZ: Research conducted at Acre Inc. • Source for Santa Rosa Temp. & Precip: *http://www.accuweather.com/us/ca/santa-rosa/95401/forecast-month.asp

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