Views
5 years ago

Blacksburg, Virginia - Virginia Tech

Blacksburg, Virginia - Virginia Tech

Southern Piedmont In

Southern Piedmont In 2009, biomass yield from the Southern Piedmont location showed significant N rate x N source interaction (p = 0.0335) and therefore interaction means are presented (Figure 3-7). Quadratic response to increasing N rate was observed for both N sources (Figure 3-7). Unlike the Blacksburg location, at this location, differences in N sources were observed in 2009. This difference in N source was shown by the difference in DM yield increase for each unit of N applied. The high yield response to N rate and source can be attributed to both adequate rainfall during the early growing season and the timely availability of ammonium nitrate versus broiler litter. Overall in 2009, biomass yield ranged from 1417 to 6151 kg DM ha -1 . In 2010, N source x N rate interaction effects were not significant at the Southern Piedmont thus, results are presented by the main effects. Biomass yield showed no response to N source (Figure 3-8B) or an increasing N rate (Figure 3-8A). The yield response, or lack there of in 2010 was most likely due to the severe drought experienced at the Southern Piedmont location throughout the 2010 growing season. Biomass yield ranged from 3285 to 4922 kg DM ha -1 . Overall, in 2009, the yield response to both N rate and source was similar for Blackstone and Blacksburg locations. However, in 2010, no yield response to N rate and source was observed, most likely due to a lack of rainfall at the Blackstone location (Figs. 3-8 A and B). 35

Total Yield (kg DM ha -1 ) 8000 6000 4000 2000 0 Broiler Litter Ammonium Nitrate y = 2401.27 + 53.58x - .23x 2 r 2 = 0.9325 p < 0.0001 y = 2212.31 + 23.83x – 0.04x 2 r 2 = 0.8175 p < 0.0001 0 20 40 60 80 100 120 140 Nitrogen Rate (kg N ha -1 ) Figure 3-7. Biomass yield response to N Rate x N source treatment at the Southern Piedmont, 2009. 36

Articles - Digital Library and Archives - Virginia Tech
The ALAN Review - Digital Library and Archives - Virginia Tech
guidelines for - Digital Library and Archives - Virginia Tech
Volume 2, Issue 3 - Institute for Policy and Governance - Virginia Tech
New Faculty - ACIS | Pamplin - Virginia Tech
Research Articles - VTechWorks - Virginia Tech
Brochure - Macromolecules and Interfaces Institute - Virginia Tech
Faculty Expertise Guide - College of Engineering - Virginia Tech
PDF (3 MB) - Virginia Cooperative Extension - Virginia Tech
Mass Shootings at Virginia Tech
The Research Enterprise at Virginia Tech
PDF - 3.3MB - Virginia Tech
Tech Report - University of Virginia
CESA in Switzerland - Virginia Tech
Heterotic swampland - Physics - Virginia Tech
Virginia Tech Visitor Center - Schellhammer
SWATH AGOR Team - Virginia Tech
VOMA - VCOM - Virginia Tech
Center for the Arts - The Campaign For Virginia Tech
Homestead Highlights - Reynolds Homestead - Virginia Tech
Brazil 2012 - Water Resources - Virginia Tech
Doing Business in Europe - International Programs - Virginia Tech
September 1, 2011 - Northern Virginia Center - Virginia Tech
CULPEPEr SENIor BULL SALE - Virginia BCIA! - Virginia Tech
June 1, 2011 - Northern Virginia Center - Virginia Tech