Effect of photo selective plastics on the quality of lettuce
2001
Kleemann, M. (Estonian Agricultural University, Tartu (Estonia). Dept. of Horticulture)
The aim of the experiments was to assess the effect of far-red filter on the quality oflettuce plants. Experiments with lettuce were carried out in the springtime on the field of my summerhouse near Visusti in 2000 and 2001. Plants were grown on the open land with and without far-red filter. The colour of plants grown under far-red filter was beautiful light green compared to plants grown in control, which were yellowish, darker green. Under far-red filter grown plants tasted less bitter compared to plants in control. The incidence of tipburned leaves decreased under far-red filter. The yield was higher, when plants were grown under far-red filter (in 2001). Calcium content was significantly higher under far-red filter. Plants grown under far-red filter contained less dry matter (in 2000) and chlorophyll
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