Precision Placement of Dairy Slurry to Supply N and P for Silage Corn.
Bittman, S., Hunt, D., Zhang, H. "Precision Placement of Dairy Slurry to Supply N and P for Silage Corn." 2016. ASA-CSSA-SSSA International Annual Meeting 2016-Phoenix, AZ, Nov. 6-9.
Corn benefits from starter fertilizer even when grown on high fertility soils receiving manure. Starter P can be supplied by liquid manure or slurry sludge if precision placed near corn rows. However injection of manure can cause increased risk of N2 O emission and nitrate leaching, The study was conducted over 4 years in a moist maritime climate in south coastal BC, Canada, Manure was injected to 15 cm depth at 70 cm spacing a a few days corn was precision planted 0 to 10 cm from the corn rows. Corn was harvested fo silage and treatments were repeated for 4 years. Corn yields and N uptake with injected manure was superior to broadcast manure and approached commercial fertilizer but at somewhat higher N application rates. There was relatively little difference between manure and fertilizer for N leaching which persisted overwinter but N2O emissions were much greater for injected then broadcast manure or fertilizer however application of nitrification inhibitor DCD mitigated the emission peak after manure application.
Report a problem on this page
- Date modified: