Update My Crop Profile
My Farm Data
Your 2019 farm crop profile contains new seeding-year alfalfa.
Information and recommendations will be based on this profile.
Will Supplemental Growth Hormones Increase Quality or Yield?
Fertilization question asked by Travis in Ballard County 7 months ago.
In an intensively maintained operation, will the addition of the plant growth hormones IBA (auxin) and kinetin (cytokinin) in an existing foliar application be successful in increasing either yield or quality?
Should there be a concern with downward taproot growth when applying IBA to seeding year alfalfa?
1 Answer Posted
Plant growth hormones can increase plant growth in forages including alfalfa, but the results have been inconsistent in providing a consistent yield increase. In most cases, limited spring growth in alfalfa is caused by poor growing conditions (including cool wet weather) or low fertility and low pH. Therefore, I would not encourage applying plant growth hormones. If hormones are applied it is important to first make sure that pH is 6.5-7.0 and that soil test nutrients are at a high level (phosphate >60 lbs/acre and potash >300 lbs/acre). In other words, fertilize first before spending money on plant growth hormones.
Respond with Your Answer
How does it work?
Posting a question on Kentucky Alfalfa not only helps you, but the entire agricultural community. Other producers can respond with helpful insight, and agronomists can respond with actionable answers.
Only the original producer asking the question, or an official public University of Kentucky Extension agent agronomist can mark a question as fully answered.