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Fluid Fertilizer’S Role In Sustaining Soils Used For Bio-Energy Feedstock Production, John L. Kovar, Douglas L. Karlen
Fluid Fertilizer’S Role In Sustaining Soils Used For Bio-Energy Feedstock Production, John L. Kovar, Douglas L. Karlen
Douglas L Karlen
The use of corn (Zea mays L.) as a bio-energy feedstock has attracted the attention of many producers. Recently, the focus has shifted from grain-based to cellulose-based ethanol production. In addition to biological conversion of corn stover to ethanol, thermal conversion (pyrolysis) of stover is being explored. Regardless of post-harvest processing, the short- and long-term effects of both increasing grain yields and removing stover on soil nutrient cycling, physical properties, and biological activity must be understood to ensure that soil productivity and ecosystem services are maintained. Our objectives for 2010 were to evaluate: (i) the use of surface or …
Fluid Fertilizer’S Role In Sustaining Soils Used For Bio-Fuels Production, John L. Kovar, Douglas L. Karlen
Fluid Fertilizer’S Role In Sustaining Soils Used For Bio-Fuels Production, John L. Kovar, Douglas L. Karlen
Douglas L Karlen
Fast pyrolysis is optimized for production of bio-oil. Product yields are typically ~65% bio-oil, 20% biochar, 15% syngas.
Project Objective
To investigate N, P, K, and S dynamics in a comprehensive residue removal, tillage, and nutrient management study
Project Treatments
*Residue removal: 0, 50%, 90%
*Tillage: chisel plow, no-till
*Nutrient management: conventional (30K plants/A), high input (44K plants/A)
•Bio-char: 0, 4.32 tons/A, 8.25 tons/A
•Cover crops: annual, perennial
2009 Soil Test Levels
2009 Nutrient Management
Field Measurements
•Stand counts
•Whole-plant samples at V6
•Ear-leaf samples at mid-silk
•Grain yield and moisture
•Stover yield and moisture
•Grain and stover nutrient content