- Decreased rainfall, along with more sunlight (solar radiation), appeared to have a positive effect on tonnage, while negatively affecting starch levels in 2014 compared to 2013.
Table 1. Corn silage quality trait values averaged over 48 locations and 3 years, 2012 to 2014.
Trait |
2014 |
2013 |
2012 |
---|
Tons/Acre (35% DM) |
23.3 |
21.5 |
23.4 |
% Starch |
34.6 |
39.3 |
36.6 |
%NDFd |
46.0 |
46.5 |
49.0 |
Lbs. Milk/Ton |
3,425 |
3,599 |
3,625 |
Planting Rate |
35,400 |
36,700 |
33,800 |
- Environmental conditions during vegetative growth resulted in taller plants, and a higher proportion of tonnage coming from the green portion of the plant. This likely decreased the grain-to-stover ratio, lowering overall starch percentages even in a year with high grain yields.
- Weather data show that solar radiation was up and rainfall was down slightly in 2014 compared to 2013. It is likely that the lower NDFd in 2014 was due to rainfall and associated reduction in solar radiation being concentrated in the vegetative phase of development.
Figure 5. NDFd and starch percentages among selected silage hybrids,
2012 to 2014.