Sunflower
sunflower silage was compared with corn. The nutritional quality of sunflower silage is
generally recognized as adequate for dry cows, steers, and low milk producers.
III. Growth Habit:
Sunflower is an annual, erect, broadleaf plant with a strong taproot and prolific lateral
spread of surface roots. Stems are usually round early in the season, angular and woody
later in the season, and normally unbranched.
Sunflower leaves are phototropic and will follow the sun's rays with a lag of 120 behind
the sun's azimuth. This property has been shown to increase light interception and
possibly photosynthesis.
The sunflower head is not a single flower (as the name implies) but is made up of 1,000
to 2,000 individual flowers joined at a common receptacle. The flowers around the
circumference are ligulate ray flowers without stamens or pistils; the remaining flowers
are perfect flowers (with stamens and pistils)
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