Effect of some natural extracts, indolbutiric acid and naphthalene acetic acid on rooting of Picual olive cuttings

Abstract EN

This study was carried out during ٢٠١٤ and ٢٠١٥ seasons in a private plastic green house at Belbies District, Sharkia Governorate, Egypt in an attempt to replace the traditional olive cutting rooting synthetic growth regulators by some auxin releasing natural extracts.

Cuttings of Picual olive cv.

were prepared on November of each season (about ١٥ cm long and٧-٩ mm in diameter), cutting were dipped in concentrations of indole-٣-Butyric acid (IBA) at ٤٠٠٠ ppm and naphthalene acetic acid (NAA) at ٥٠٠ ppm solution for ٥ seconds or soaked in the natural extracts for half hour.

The results revealed that the maximum rooting percentage (٨١.٤٤ and ٨٥.٦٠%), number of roots/cutting (١٤.٨٤ and ١٤.٩٠ root/cutting), shoot number/ transplant (٢.٧٤ and ٢.١٧ shoot/plant), leaf number/plant (٦.٤٩ and ٦.٦١ leaf/plant) and bud sprouting percentage (٤٨.٤٦ and ٤٨.١٤ %) respectively were recorded for cuttings dipped in IBA at ٤٠٠٠ ppm in comparison with those dipped in moringa extracts, which gained the lowest values of the considered parameters during the two seasons.

The highest cutting survival percentages were recorded for IBA and NAA treatments, garlic at ١٠ or ٢٠%, liquorice at١٠ g and algae at ٢.٥ or ٥ cm in both seasons without significant differences between them.

Total carbohydrates percentages in the roots and shoots were gradually increased with the advance in planting months, and reached the highest values after seven months, but total soluble phenols in the roots were decreased after six months then increased in the seventh month in both seasons.

The algae, garlic and liquorice treatments were considered the best natural extracts compared to yeast and in turn can be used as an alternative of growth regulators for rooting Picual olive cuttings.