Effect of NAA and IAA on Stem Cuttings of Dalbergia Sissoo (Roxb)

Abstract

The plant cuttings is one of the most common methods of vegetative reproduction which is, today, used extensively due to low cost. In order to study the effect of various concentrations of Naphthalene acetic acid (NAA) and Indole acetic acid (IAA) on the rooting of semi- hardwood cuttings of Dalbergia sissoo , an experiment was carried out in a private field in Koya city in 2014. In this research, the treatments were prepared to include hormone of Naphthalene acetic acid in four levels of: (0, 100, 300 and 500 ppm) and Indole acetic acid in four levels of: (0, 100, 300 and 500 ppm), and the bottom part of the cutting was dipped into above solutions for 30 seconds. The results showed that the maximum percentage of the shooted cuttings, shoot length, number of main branch, diameter of main branch, leaf area, number & length of root, dry weight & biomass &dry matter of shoot, fresh &dry weight of root, biomass &dry matter of root and chlorophyll a belonged to IAA treatment with concentration of 500 ppm, NAA treatment with concentration of 500 ppm. Nitrogen and protein increased with concentration 300 ppm for IAA amd NAA auxins. The highest length of root belonged to IAA treatment with concentration of 500 ppm. All growth parameters were increased up to the highest concentrations of IAA 500 ppm. IAA was the most effective in promoting growth of Dalbergia sissoo cuttings.