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Fertility Issues in Switchgrass Production Joint Meetings of SERA- ieg 6, NEC-17 and NCRA-13 2008 Nashville, Tennessee Donald Tyler University of Tennessee

Fertility Issues in Switchgrass Production

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Fertility Issues in Switchgrass Production. Donald Tyler. University of Tennessee. Joint Meetings of SERA-ieg 6, NEC-17 and NCRA-13 2008 Nashville, Tennessee. DOE UT Switchgrass Project. Burt English (Co-director) Daniel DeLaTorre Ugarte (Co-director). Chris Clark Clark Garland - PowerPoint PPT Presentation

Text of Fertility Issues in Switchgrass Production

  • Fertility Issues in Switchgrass Production Joint Meetings of SERA-ieg 6, NEC-17 and NCRA-132008Nashville, TennesseeDonald TylerUniversity of Tennessee

  • DOE UT Switchgrass Project Burt English (Co-director) Daniel DeLaTorre Ugarte (Co-director) Chris ClarkClark GarlandKen GoddardKim JensenRoland RobertsLarry SteckelDonald TylerMarie Walsh

  • Sources of Ethanol in USACorn starch basedSugarcane sugar (Brazil)

    Corn limited suitable land - competes for corn as food - high inputs - FFE of 1.1 to 1.2 to 1

  • Cellulosic EthanolWood wastes (expensive)Corn and wheat stover (limited)

    Crops: Switchgrass (Panicum virgatum) FFE 5.2 to 1 Giant miscanthus Hybrid poplar (North USA)

  • Status No surplus or production advantage for corn or soybean production in TN. Our competitive advantage is perennial switchgrass.

    Thrust for cellulosic ethanol production and use at national and state level.

    Lack of efficient switchgrass production strategies in TN.

  • SwitchgrassPerennialRelatively low input cropOther species & biomass sourcesCompetitive advantage in the SoutheastNative speciesPlanted with seedNo specialized planting or harvesting equipment

  • Dedicated Energy Crops -- 2010Estimated using POLYSYS analytical system, Daniel De La Torre Ugarte and Burton English

  • Dedicated Energy Crops -- 2020Estimated using POLYSYS analytical system, Daniel De La Torre Ugarte and Burton English160 million tons of switchgrass from 19 million acres

  • Dedicated Energy Crops -- 2030Estimated using POLYSYS analytical system, Daniel De La Torre Ugarte and Burton English362 million tons of switchgrassfrom 35 million acres

  • Research in Progress Soil / landscape suitability Seeding / nitrogen rate interactions Cultivar selection Weed control strategies On farm demonstrationsSwitchgrass production:

  • Seeding Rate Nitrogen Study Nitrogen rates: 0, 60, 120, 180 lbs. N per acre as NH4NO3. Spring applied starting the 2nd season. Seeding rates: 2.5, 5.0, 7.5, 10.0 and 12.5 lbs. PLS per acre. Alamo variety

  • NitrogenBeing evaluated

    Responses vary

    Presently 60 lbs. N/A after first year

  • Seeding Rate60 lbs. N/A11.3 ab10.6 ab12.6 a10.5 b10.5 bDM Yield in T/ALbs./ A PLS2006 Well drained to moderately well drained level upland0 lbs. N/A120 lbs. N/AValues within a nitrogen rate followed by the same letter are not significantly different at P = 0.05
  • Seeding Rate60 lbs. N/A 5.1 b 6.8 a 7.2 a 7.2 a 7.0 aDM Yield in T/ALbs./ A PLS2006 poorly drained floodplain0 lbs. N/A120 lbs. N/AValues within a nitrogen rate followed by the same letter are not significantly different at P = 0.05
  • PhosphorusRemoved tissue concentration ( 8 locations over 5 years) 0.09% P

    8 tons to the acre = 14 lbs P/A or 32 lbs P2O5

    Low testing (Mehlich 1) = 40 lbs P2O5/A

  • PotassiumRemoval tissue concentration (8 locations over 5 years) 0.52% K

    8 tons/A = 83 lbs K/A or 100 lbs K2O/A

    Low testing (Mehlich 1) = 80 lbs K2O/A

  • Soil AcidityNo lime recommended pH 5.0 and above

    O. M. complexing Al and Mn

  • SummaryEstablishment 6 lbs./A PLS Tilled or no-tilled inch or less coverage. Fertilization 60 lbs./A N after 1 year 40 lbs./A P2O5 & 80 lbs./A K2O at low soil test.Weed Control Broadleaf available Grass control in process.Harvest Big round or square bales Modules? Stack storage? In field processing?

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