ISSN:
1573-5036
Keywords:
Aster
;
Bedding plants
;
Celosia
;
Coleus
;
Growth effects
;
Marigold
;
NPK solutions
;
Osmotic stress
;
Petunia
;
Polyethylene glycol
;
Salinity
;
Snapdragon
Source:
Springer Online Journal Archives 1860-2000
Topics:
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
Summary Six ornamental species (Petunia hybrida, Callistephus hortensis, Coleus blumei, Celosia pyramidalis, Antirrhinum majus andTagetes erecta) were grown in solutions containing high concentrations of polyethylene glycol (MW 4000) or of Nitrogen: Phosphorus: Potassium. At equal osmotic potentials, top dry weight, leaf area and leaf elongation rate were all reduced more by polyethylene glycol than by NPK. Polyethylene glycol also produced some leaf damage which did not occur with NPK solutions. Osmotic potentials of −600 kPa due to NPK reduced growth of the six species by at least 25% compared with growth of control plants (at −20 kPa). Tolerance ranking to high fertilizer in the irrigation solution increased from Snapdragon (most sensitive), Marigold Coleus, Aster, Celosia and Petunia (most tolerant).
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF02197957
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