EFFECT OF GIBBERELLIN AND LIQUORICE EXTRACT ON FRUITS PHYSICALS CHARACTERISTICS OF DATE PALM Phoenix dactylifera L. ZAHDI CV.

Abstract

This experiment was conducted in a private orchard in Falluja city, season of 2002, to investigate the effect of spraying date fruits with each of GA3, and Liquorice extract on yield quality characteristics.البحث مستل من رسالة ماجستير للباحث الثالثHand pollination was carried out of April 2002. After the fruits setting was completed. The spraying with GA3 and liquorice extract was done in two periods. The first one was at Hababuk stage and the second was at Chemri stage. In both stages fruits were sprayed with 250 mg / l GA3, 2 and 4 gm / l of liquorice extract in addition to the control (fruits lefted without spraying).Results were showed that spraying treating date palm fruits with GA3 significantly increased total yield to 86.03 kg, bunch weight to 14.33 kg, fruits weight to 12.48 gm, fruits hall weight to 11.44 gm and seeds weight to 0.93 gm. However treating date palm fruits with 4 gm / L liquorice extract, significantly increased total yield to 84.38 kg, bunch weight to 14.03 kg, fruits weight to 12.38 gm, hall weight to 11.44 gm and seeds weight to 0.93 gm. The percentage of ripened fruits were significantly increased to 94.91% when 4 gm / l liquorice extract was used, while GA3 decreased this percentage to 86.17%.