Increasing Seedling Density, Age, and Nitrogen Fertilization Increases Onion Yield

in HortScience
View More View Less
  • 1 Department of Horticulture, Michigan State University, East Lansing, MI 48824
  • 2 Department of Horticulture, Michigan State University, East Lansing, MI 48824

Three onion (Allium cepa L.) cultivar transplants were grown in the greenhouse in 200-cell plastic trays with one, two, or three plants per cell; at 75, 150, or 225 ppm N; and for 8, 10, or 12 weeks. Increasing the number of plants per cell resulted in smaller seedlings at transplanting and reduced time to maturity in the field by 1 week. Two and three plants per cell yielded more bulbs ≥76 mm in diameter, but one plant per cell had the highest percentage of bulbs ≥102 mm in diameter. Older seedlings and higher N applications produced larger plants at transplant and larger bulbs at harvest. Increasing N applications reduced maturation time slightly. Bulb fresh weight at harvest and yield of bulbs ≥76 mm in diameter were highest with 10- and 12-week-old transplants, and at 150 and 225 ppm N.

If the inline PDF is not rendering correctly, you can download the PDF file here.

Contributor Notes

to whom reprint requests should be addressed.
All Time Past Year Past 30 Days
Abstract Views 0 0 0
Full Text Views 214 74 4
PDF Downloads 180 78 10