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Parameterizing the day cent model easter
This document summarizes efforts to parameterize the DayCent biogeochemical model for specialty crops in California within the COMET-Farm tool. Researchers conducted field work and literature reviews to understand specialty crop management practices like irrigation systems, orchards/vineyards, and mulching. They improved the DayCent tree model and integrated parameters for crops like lettuce, tomatoes, and almonds. Initial results show potential for modeling over 85% of California's cropland by accounting for these specialty crops. The work adds capabilities for COMET-Farm to model greenhouse gas emissions from a wider range of agricultural systems.
Parameterizing the day cent model easter
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- 2. Outline • Brief Introduction to COMET‐FarmTM • Brief Review of Existing COMET‐FarmTMCapabilities for California Crops • Process for adding California Specialty Crops to COMET‐FarmTM • DayCent Model Parameterization Results and Status • Wrap‐Up
- 3. Kerri Steenwerth Davis Adam Chambers – Portland California State Office Staff Bill Hohenstein, Marci Baranski OCE ‐ CCPO, Washington, DC Xia Zhu‐Barker, Will Horwath et al., Davis College of Ag Sci Fort Collins AmrithGunasekara Sacramento Keith Paustian, Mark Easter, Amy Swan et al., Fort Collins Specialty Crops Collaboration Partners
- 4. What is COMET-FarmTM? Web‐based Greenhouse Gas (GHG) Inventory Tool Whole System GHG Inventory and Conservation Scenario Analysis
- 5. Why This Effort? All Croplands Crops that can currently be modeled in COMET‐Farm shown in brown •~ 10 million acres of cropland in California • COMET‐FARMTM currently covers crops grown on ~60‐65% of cropland in California1 • Specialty Crops Gap: 35‐40% of cropland in California1 1Sources: NASS, Cropland Data Layer
- 6. California Croplands Strawberries Lettuce Broccoli Cauliflower Almonds WalnutsPistachiosGrapes Citrus Peaches/ Nectarines Prunes/ Plums • COMET‐FarmTM Currently covers tomatoes, cotton, other commodity crops • Working with California Dept. of Food and Agriculture to add and improve major specialty crops • Work started in Dec. 2015 and is planned to be completed by June 2017 Processing Tomatoes Cotton
- 7. Parameterizing the DayCentModel How are the crops managed? Learning Tours Plant Physiology, production? Literature Reviews How does the DayCent Model Perform? Parameterization, Testing Web Site Modifications, Deployment
- 8. Specialty Crop Management Cropland Management in COMET‐Farm: •Planting and harvest • Tillage • Nitrogen Fertilizer Application • Manure/Compost Application • Irrigation • Liming • Burning • Mineral vs organic fertilizers Specialty Crop Management: • Novel irrigation systems • Orchard/Vineyard renewal • Orchard/Vineyard pruning and thinning • Mulches • Novel Cover Crops
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- 11. DayCent Tree ModelImprovements Leaf Fine roots Fine branches Large wood Coarse roots Fruit Surface residue Roots residue Dead fine branches Pruning Dead large wood Dead coarse roots Harvest Thinning Metabolic Structural Metabolic Structural Active SOM Slow SOM Metabolic Structural NL L NL: Non-lignin L: Lignin TEM: Monthly soil temperature PPT: Monthly precipitation PPT TEM Plant Production Add in a legend/key To explain colors
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- 13. Integration into COMET-FarmTM– DayCent Parameterization R2 = 0.32 Lettuce Processing Tomatoes
- 14. Integration into COMET-FarmTM– DayCent Parameterization - Almonds Almonds
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