ISHS Acta Horticulturae 559: V International Symposium on Protected Cultivation in Mild Winter Climates: Current Trends for Suistainable Technologies
WEIGHT CONTROLLED IRRIGATION OF POTTED PLANTS |
| Author: | N.E. Andersson |
| Keywords: | Load cell, Pelargonium zonale, water use efficiency |
| DOI: | 10.17660/ActaHortic.2001.559.55 |
| Abstract:
Irrigation of potted Pelargonium zonale 'Mawerick' was controlled by the decrease in weight of the pot with and without compensation for increase in plant growth. The plants were irrigated after a decrease in weight of 20, 50, 90 and 120 grams, adding water in cycles of 120 s with 200 s drainage until the initial weight was reestablished. High decrease in weight drop of the pot before irrigation (90 and 120 g treatments) in combination with no adjustment for increase in plant weight, reduced plant growth to a high extent. Plant height, number of leaves, leaf area and fresh and dry weight were significantly influenced by the irrigation regime. No differences in water use efficiency (WUE, dry matter accumulated in relation to water consumption) were recorded. No significant differences in plant growth were found between treatments when compensation for plant weight increase was used. | |
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