Flowering and vegetative growth of strawberry. II

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  • イチゴの花成と栄養生長に関する研究 (第2報)
  • イチゴの花成と栄養生長に関する研究-2-
  • イチゴ ノ カセイ ト サカエ ヨウセイチョウ ニ カンスル ケンキュウ 2
  • Influence of “Light break” effect

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1. Influences of photoperiod, especially light break, given before or after flower bud differentiation, on the initiation and development of flower bud in strawberry were studied using variety Red Star.<br>2. Flower bud differentiation was markedly delayed by long day treatments (15_??_161/2 hours and 24 hours) or a fairly long light break (8+3 hours) given before the differentiation (September 1). Effect of light break could hardly be seen when it was short (7+1/2 hours).<br>3. Light break of 8+3 hours was nearly as effective as the 15_??_161/2 hour long day treatment in terms of the delaying effect on flower bud initiation.<br>4. Increase in foliar length and the number of runners was observed in plants given long day or three-hour light break.

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