ISHS Acta Horticulturae 567: IV International Strawberry Symposium
STRATEGIES OF RAISING TRANSPLANTS FOR STRAWBERRY PRODUCTION IN A PROLONGED SEASON IN A NORDIC CLIMATE |
| Authors: | A. Nes, N. Opstad, B. Hageberg, R. Hagelund, S.O. Grimstad |
| Keywords: | Fragaria x ananassa Duch., plant quality, strawberry, waiting bed plants |
| Abstract:
The results of a project with the aim of raising waiting bed plants with less energy and cost is reported. Runner plantlets were rooted in August, kept in cold store at –1oC and transplanted onto raised beds at high plant density in the open in May. They were lifted from the beds in early December. Alternatively runner plantlets were rooted in plug trays in early May where they grew until being transferred into a glasshouse at different dates in the autumn. There the day/night temperatures were 15/12oC and the atmosphere was enriched with 700 ppm CO2. The plants were exposed to different light levels (85 or 170 mol m-2 s-1 PAR) and day lengths (16 or 20 hour ) until 15 November by use of SON-T lamps. For the following three weeks the plants were exposed to natural short days and gradually lower temperatures (6/3oC day/night) before being stored in polyethylene bags in boxes at –1 oC until transplanting into the field in June. The field experiment was established 9 June with 30 plants/plot and four replicates in a block design. The first harvest was 6 August and the last was 14 September. Total yield, saleable yield graded in three different grades and the amout of rotted berries were recorded at each harvest in two seasons. | |
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