Effect of gibberellic acid and some natural compounds application on vegetative growth, yield and fruit characteristics of Jojoba Shrubs

Abstract EN

This study was carried out during 2014 and 2015 seasons in a private orchard of Jojoba located at Mout, El-Dakhla, New Valley Governorate to examine the effects of GA3 (25, 50 and 100 ppm), camphor oil (1.5, 3.0 and 4.5 cm3/L), effective microorganisms (EM1, 3, 6 and 9 cm3/L), glauconite compound (250 and 500 g/shrub) and a mixture of GA3 (50 ppm) with the afromentioned concentrations of camphor oil on vegetative growth, yield/shrub and Jojoba seed characteristics.

The treatments were conducted at start of Jojoba blooming (the 1st application time), and the 2nd application was achieved 3 weeks after fruit set, except the glauconite was applied 3 weeks before Jojoba blooming.

The experiment was conducted in randomized complete block design (RCBD) with 3 replicates, 2 shrubs each.

According to the obtained results of this study, it could be deduced that all treatments improved the vegetative growth, yield and seed quality.

Concerning oil weight/100 seeds and oil % in seeds treatment with mixture of GA3 (50 ppm) and camphor oil (1.5 or 3.0 cm3/L) gave the best results during the two studied seasons.

Therefore, for improving yield and seed quality it could be recommended spray jojoba a mixture of GA3 (50 ppm) plus camphor oil at 1.5 or 3.0 cm3/L under the condition of this study.