Articles
PLACED NITROGEN STARTER FERTILIZER STRATEGY FOR FIELD GROWN ICEBERG LETTUCE (LACTUCA SATIVA)
Article number
936_38
Pages
299 – 304
Language
English
Abstract
The production of iceberg lettuce (Lactuca sativa) has been shown to be a potential source of nitrogen (N) leaching to ground water.
Growers are concerned that reduced levels of N will lead to reduced yield and lowered quality.
Experiments with a wide range of N levels the previous season showed that placed N fertilizer at planting had potential to reduce total N levels needed.
This project was designed to verify these findings with use of commercially used, and lower, levels on N. The N content in the lettuce dry material at harvest and the N content in the soil profile (Nmin) at several stages during the season were studied.
By using placed starter N fertilizer, the total amount of N applied could be reduced by more than 25% without loss in yield or lowered quality.
By using this strategy the risk of N leaching from the field could be significantly reduced at planting, during growth and after harvest.
Growers are concerned that reduced levels of N will lead to reduced yield and lowered quality.
Experiments with a wide range of N levels the previous season showed that placed N fertilizer at planting had potential to reduce total N levels needed.
This project was designed to verify these findings with use of commercially used, and lower, levels on N. The N content in the lettuce dry material at harvest and the N content in the soil profile (Nmin) at several stages during the season were studied.
By using placed starter N fertilizer, the total amount of N applied could be reduced by more than 25% without loss in yield or lowered quality.
By using this strategy the risk of N leaching from the field could be significantly reduced at planting, during growth and after harvest.
Authors
L. Mogren, H. Asp , K. Ekengard, G. Torstensson
Keywords
broadcast, placed, leaching
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