Work

Comparison of Various Nitrogen Sources for the Fertilization of Winter-grown Head Lettuce1

Year: 1979

Type: article

Abstract: The effectiveness of ammonium nitrate, ammonium sulfate, calcium nitrate and urea for winter grown head lettuce ( Lactuca sativa L.) was evaluated. N source did not affect yield, quality factors, head size or total N accumulation. Applications of fertilizers containing NO 3 -N resulted in slightly higher NO 3 -N concentrations in the midribs. Plant growth and N accumulation were similar with all N sources at low temperatures. Air temperature below 13°C for a week or more sharply reduced N uptake and plant growth with all sources. About 80% of the total N is taken up by the plants in the 4 weeks before harvest. N source did not affect quality.

Source: Journal of the American Society for Horticultural Science

DOI: 10.21273/jashs.104.4.534

Authors: B. R. Gardner, W. D. Pew

Institution: University of Arizona

Language: English

Topic: Plant Growth and Agriculture Techniques

Subfield: Soil Science

Field: Agricultural and Biological Sciences

Domain: Life Sciences

SDG: Zero hunger

Open Access status: hybrid

Estimated APC paid: $3,500