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Fruit nitrogen content of sixteen strawberry genotypes grown in an advanced matted row production system


, : Fruit nitrogen content of sixteen strawberry genotypes grown in an advanced matted row production system. HortScience: a ication of the American Society for Horticultural Science 40(5): 1190-1193

In the perennial strawberry production system, removal of the harvested crop represents a loss of nitrogen (N) that may be influenced by cultivar. Eight strawberry (Fragaria xananassa Duch.) cultivars and eight numbered selections grown in advanced matted row culture were compared over three seasons for removal of N in the harvested crop. Replicated plots were established in 1999, 2000, and 2001 and fruited the following year. 'Allstar', 'Cavendish', 'Earliglow', 'Honeoye', 'Jewel', 'Northeaster', 'Ovation', and 'Latestar' and selections B37, B51, B244-89, B683, B753, B781, B793, and B817 were compared for yield and fruit N concentration. Harvest removal of N (HRN) was calculated from total season yield and fruit N concentration at peak harvest. There were significant differences in HRN among genotypes, ranging from 1.80 to 2.96 g N per meter of row for numbered selections B781 and B37, respectively. Among cultivars, HRN ranged from 2.01 to 3.56 g.m(-1) for 'Ovation' and 'Jewel', respectively. The amount of HRN was largely determined by yield, however, there were also significant genotype differences in fruit N concentration, ranging from 0.608 to 0.938 mg N per gram fresh weight for B244-89 and 'Jewel', respectively. These differences indicate that N losses in the harvested crop are genotype dependent.

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