Effects of Foliar Application of Choline Chloride on the Quality of Winter-cropped Fig cv. Masui-Dauphine Grown in Hydroponics.

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  • 養液栽培による'桝井ドーフィン'イチジクの冬作における着果および塩化コリン散布処理が果実品質に及ぼす影響

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Abstract

Cuttings of fig cv. Masui-Dauphine were imbedded into rockwool cube on May 30 and rooted in Hoagland II solution of EC 2.4 dS·m-1. The rooted cuttings were transplanted onto a noncirculating closed hydro-culture system in the greenhouse on July 13. These trees formed the first fruit at the 11th node on August 11 and bore 16 fruits per plant. Trees were sprayed with 1500ppm choline chloride solution or water (control) on October 9, November 6 and 27. Of fruits harvested from October 27 to December 27, the sprayed fruits were heavier than those of control until November 16, but subsequently, no difference in fresh weight was detected between the treatment and the control fruits. The total fruit weights per tree were 910g and 790g in the sprayed and control, respectively. The photosynthetic rate decreased with the decline in photosynthetic photon flux density ; it was temporarily increased with choline chloride treatment on October 9 and November 6.

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