Abstract
ABSTRACTExperiments conducted over 2 years evaluated photoperiod and nitrogen conditioning of ‘Albion’ strawberry (Fragaria x ananassa Duch.) plants for off-season field production in New Jersey, USA. Plants were conditioned the first year with natural days (ND, natural daylength) or long days (LD, natural daylength supplemented with 24 h incandescent radiation) for one week followed by 100 or 800 ppm N for 4 weeks under ND or LD. The second year, plants were conditioned with ND or LD for 1 week followed by 1 to 6 weeks of 100 or 800 ppm nitrogen (N) under ND or LD. After conditioning, plants were established in plasticulture. Ripe fruit were harvested from August through October both years. LD conditioning enhanced precocity by approximately 9 days in both studies. Productivity was also enhanced by conditioning with LD or elevated N. Plants grown on silver or white mulch were more productive than those grown on black mulch in the first study, but not the second.
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