Effect of spray some growth  regulators and its concentration  on the growth of Periwinkle Cartharanthus  roseus                 seedlings           ( Vinca rosea )

F.Jabur, Khalil; H.Jaber, Thamer

	Effect of spray some growth regulators and its concentration on the growth of Periwinkle Cartharanthus roseus seedlings ( Vinca rosea )
Thi-Qar University Journal for Agricultural Researches
Article 1, Volume 5, Issue 1, 2016, Pages 275-286
Authors
Khalil F.Jabur; Thamer H.Jaber
Abstract
The experiment conducted at the spring season to study the effect of two types of growth regulators (IBA,NAA ) with four concentrations( 0, 10 ,15, 20 ppm. )by spray on the vegetative parts. The results of statistical analysis showed the both factors and interaction of these factors gave asignificant effect for most characteristics so the indol compounds gave the best results than nephthalin compound at the high concentrations. The treatment G1S3 (Indol butric acid with 20 ppm. Con. ) and the next treatment G2S3 (Nephthlin acetic acid with 20 ppm. Con.) gaves the best results so recommends to use these treatments for improve the vegetative and root growth, and give attention for study the high levels concentrations of this growth regulators at the future .

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