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Medientyp:
E-Artikel
Titel:
Growth and Nutrient Status of Celery Seedlings in Response to Nitrogen Fertilization and NO3:NH4 Ratio
Beteiligte:
Tremblay, Nicolas;
Gosselin, André
Erschienen:
American Society for Horticultural Science, 1989
Erschienen in:HortScience
Sprache:
Nicht zu entscheiden
DOI:
10.21273/hortsci.24.2.284
ISSN:
0018-5345;
2327-9834
Entstehung:
Anmerkungen:
Beschreibung:
<jats:title>Abstract</jats:title>
<jats:p>Celery seedlings (<jats:italic>Apium graveolens</jats:italic> L. cv. Florida 683) were seeded in multicell styrofoam trays containing a commercial peat mix. They were irrigated with nutrient solutions containing three N fertilizations (150, 250, or 350 mg N/liter) and three NO<jats:sub>3</jats:sub>:NH<jats:sub>4</jats:sub> ratios (1:1, 2:1, or 3:1) in factorial combinations. Growth measurements and saturated medium extracts were obtained on days 38, 45, and 52 after seeding. Increasing N fertilization increased leaf area and shoot dry weight, but decreased root dry weight and root : shoot ratio. The lowest NO<jats:sub>3</jats:sub>:NH<jats:sub>4</jats:sub> ratio had increased the percentage of shoot dry matter by the end of the experiment. Nitrogen was preferentially taken up as NH<jats:sub>4</jats:sub>-N. The composition of the fertilizer solution had a greater effect on young celery seedlings than on older ones. A minimum of 250 mg N/Iiter at a NO<jats:sub>3</jats:sub>:NH<jats:sub>4</jats:sub> ratio of 2:1 appears to be adequate for celery seedlings grown in multicells.</jats:p>