Effects of some growth hormones and a foliar fertilizer on growth and flowering of some rose cultivars (rosa sp.)‎

Dissertant

Abd Allah, Muhammad al-Mubarak Abd al-Raziq

Thesis advisor

Yaghi, Mahmud Ibrahim

University

Omdurman Islamic University

Faculty

Faculty of Agriculture

Department

Department of Horticulture

University Country

Sudan

Degree

Ph.D.

Degree Date

2011

English Abstract

This study was conducted on the 1st of November 2004 at the Faculty of Agriculture, Omdurman Islamic University at Latitude N 15o 34' and longitude E 15o 7'.

The study was undertaken to achieve the following objectives : 1.

It's very important to improve some rose varieties in an advanced, superior and grand state that suit their esthetical value. 2.

To study the effects of some plant hormones on growth of some rose varieties. 3 To know the effects of foliar fertilizers as a source for macro and micronutrients. 4 To determine the most appropriate treatments that could be applied for the best obtainable results. In this study, rose plant rootstocks, bankasiae of Rosa canina cuttings were obtained from The National Horticultural Department, Khartoum, at Mogran, Sudan.

These cuttings, were sown in polythene bags on the first of November 2004.

On the first of February 2005, the bankasiae rootstocks were budded with a hybrid tea cv.

Alec’s Red and the other rootstocks were budded with a floribunda cv.

Sarah.

Sixty four budded rootstocks were selected from each cultivar and placed in a nursery, and were given all appropriate cultural practices as required.

On the first of July 2005, seedlings of both cultivars were treated with hormones and a complete foliar fertilizer at the following rates, IBA at 250 or 500ppm, GA3 at 100 or 200ppm, BA at 500 or 1000 ppm and the foliar fertilizer, Bayfolan at 0.2 or 0.3%.

Few drops of Tween-20 were added to the prepared treatment solutions, to act as a surfactant.

The hormones plus the fertilizer were applied to the plants with different rates and combinations.

Control plants received only water and Tween-20.

Each treatment was replicated four times and each plant represented an experimental unit.

Plants were then arranged in a completely randomized design.

Data concerning plant height, number of leaves, number of branches, number of buds, number of floral petals, length of floral stalk, number of flowers and flower diameter were collected at intervals of two weeks from time of treatments application and continued for 32 weeks.

The experiment was terminated on the thirty first of March 2006.

Data collected was statistically analyzed using analysis of variance (ANOVA) and New Duncan's Multiple Range Test (NDMRT). At the end of the experiment the following results were obtained: the treatment with GA3 at 200 ppm + Bayfolan 0.3 % and the interaction between cultivar and treatment, significantly (P<0.01) increased height to 102.05, 99.75 and 115.50cm, respectively, in cv.

Alec’s Red as compared to cv.

Sarah, which gave plants of 77.42, 84.00 and 99.75cm, in height.

The lowest plant heights were gained in cv.

Sarah with the treatments, BA at 500ppm+ GA3 at 100ppm + Bayfolan 0.2% which gave plants of 73.50, 77.42 and 83.13cm high. The treatment BA at 500 ppm + Bayfolan at 0.3% and the interaction between cultivar and treatment, gave 175.6, 186.1 and 221.8 leaves/plant, respectively, in cv.

Alec's Red, whereas cv.

Sarah, under the same treatment and the interaction between cultivar and treatment gave significantly (P<0.01) lower number of leaves/plant which were 150.1, 147.3 and 186.1, respectively. The treatments, IBA at 250ppm + Bayfolan at 0.2% and the interaction between cultivar and treatment recorded significantly (P<0.01) more branches/plant which were 50.0, 57.3 and 63.8, respectively, in the cultivar Alec’s Red.

On the other hand in the cv.

Sarah, the treatments, BA at 500ppm+Bayfolan at 0.2% and the interaction between cultivar and treatment gave significantly (P<0.01) lower number of branches/plant which were 49.3, 46.4 and 45.8, respectively. The number of buds/plant was significantly (P<0.01) increased by the effects of cv.

Alec’s Red, the treatment, GA3 at 200ppm + Bayfolan at 0.3% and the interaction between cultivar and treatment, which were 25.2, 25.4 and 29.3, respectively.

Whereas in cv.

Sarah, treatment (control) and the interaction between cultivar and treatment, control and BA at 500ppm + Bayfolan at 0.2%, gave significantly (P<0.01) lower number of buds/plant which were 18.5, 20.8 and 19.8, respectively. The treatment BA at 500ppm + Bayfolan at 0.3% and the interaction between the cultivar and treatment recorded significantly (P<0.01) higher number of petals/plant which were 41.6, 46.0 and 38.5, respectively, in the cultivar Alec’s Red.

Whereas in cv.

Sarah the treatment IBA at 500ppm+Bayfolan at 0.2% and control, achieved significantly (P<0.01) lower number of petals/plant, which were 28.8, 33.6 and 27.0, respectively. Maximum length of floral stalk was recorded by cv.

Alec’s Red, with the treatment, GA3 at 200ppm + Bayfolan at 0.3% and the interaction between the cultivar and the treatment.

Cultivar Alec’s Red gave significantly (P<0.01) longer floral stalks which were 81.23, 69.88 and 85.25cm, respectively, as compared to cv.

Sarah which gave significantly (P<0.01) shorter floral stalks, which were 52.84cm with the control, 65.13cm with BA at 500ppm + Bayfolan at 0.2%, and 49.25cm with the interaction between cultivar and treatments, respectively. The treatment, GA3 at 200ppm + Bayfolan at 0.3% and the interaction between cultivar and treatment obtained significantly (P<0.01) higher number of flowers/plant, in the cultivar Sarah, which were 31.8, 32.3 and 34.5, respectively, whereas the cv.

Alec’s Red and the control gave significantly (P<0.01) lower number of flowers/plant, which were 27.7, 25.8 and 25.3, respectively. The treatment with GA3 at 200ppm + Bayfolan at 0.3% and the interaction between cultivar and treatment, increased flower diameter significantly (P>0.01) to 9.32, 8.79 and 9.68cm, respectively, in cv.

Alec's Red.

On the other hand, cv.

Sarah, treated with IBA at 250ppm + Bayfolan at 0.2 %, the control and the interaction between cultivar and treatment, recorded significantly (P<0.01) smaller flower diameter/plant, which were 7.88, 7.45 and 8.53cm, respectively. This study indicated that application of GA3 at 200ppm, BA at 500ppm and the foliar fertilizer Bayfolan at 0.03% was effective in increasing growth parameters in rose cultivars Alec's Red and Sarah.

That increase was significant in plant height, number of leaves, number of branches, number of buds, number of petals, length of floral stalk, number of flowers and flower diameter.

Main Subjects

Botany

Topics

• Fertilizers

No. of Pages

161

Table of Contents

• APA
• MLA
• AMA

Language

English

Data Type

Arab Theses

Record ID

BIM-364122