1. The study tested the effects of two organic media (sheep manure and peat moss) and different concentrations of seaweed extract (0, 0.5, 1, 1.5, and 2 mL/L) on the growth and flowering of periwinkle plants. 2. The peat moss medium and lowest seaweed extract concentration of 0.5 mL/L produced the best results for plant height, branches, flowers, dry weight, and chlorophyll percentage. 3. Both the growing media and seaweed extract concentrations significantly impacted the vegetative growth and flowering of the periwinkle plants.

1. Effect of Amended Organic Media and
Different Concentrations of Seaweed
Extract on the Growth and Flowering of
Periwinkle (Vinca rosea) Plant

2. Catharanthus roseus ,(L.)
(Vinca rosea ,L.)
Common Name : Madagascar Periwinkle ,
Rosy periwinkle.
Family: Apocynaceae
Propagation: seed, stem cuttings.

6. 90 :
vindoleninevindolenine
leurosineleurosine
vincaminevincamine

8. ).

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bioresource

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2.Laminarin)
3.Algin(.
4.

17. (Bhaskar and Miyashita, 2005(
1222011

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25. Materials and Methods
The growth and flowering of Vinca rosea plant wasconducted in nursery
of Horticultural Department, School of Plant Production, Faculty of
Agricultural and Forestry, Duhok University, for period May 15,/2012 to Sep.
1, 2012. The study contained of testing the effects of two amended organic
media sheep manure (loam + sheep manure 1:1) and peat moss (loam +
peat moss 1:1) and different concentrations of seaweed (sea force 2)
extract included 0, 0.5, 1, 1.5 and 2 mL/L. Plastic pots of 20 cm size will fill
with the required media.Seedlings with four leaves of Vinca rosea were
planted (plant/pot). The plants were watered and left to establish in the pots
for 30 days and then sprayed by sea force 2 once time each 10 days and
repeated for three times through the experiment (June 15, June 25 and July
5, 2012) so that a new uniform growth could be studied under the new

26. Materials and Methods
Plant height was measured with a measuring tape from soil surface of
pots to the tops of three highest branches in each plant of each
treatment and then the average was calculated. The plant materials
were kept in an electric oven (at 70 °C) for three days and then the dry
weight was recorded.The testing was arranged affording to a RCBD
(randomized complete block design) of two factors in three replicates.
Duncan multiple range test under probability level (0.05) was used for
evaluation of means [15].

28. . Results and Discussions

31. Table 1 Effect of amended organic media andTable 1 Effect of amended organic media and
sea force 2 extract concentrations on plantsea force 2 extract concentrations on plant
height (cm) of Periwinkle (height (cm) of Periwinkle (VincaVinca
rosearosea) plant.) plant.

37. Conclusions
The experimental results lead us to the conclusion
that both the growing media and different
concentrations of sea force 2 extract had significant
effects on the vegetative growth and flowering
characteristics of vinca rosea plants. In terms of growth
and flower production, the peat moss medium
provided the best results of plant height, number of
branches and flowers, vegetative dry weight and
chlorophyll percentage except number and area of leaves
that significantly increased in sheep manure. As far as the
spraying of sea force 2 extract noticed that low
concentrations especially 0.5 mL/L was slightly better
than the other concentrations and control to increase the
most of vegetative and flowering growth characteristics
of vinca plant.

42. Slide Title

43. Landscape value: Beds ,window boxes,
pots, edging
or containers.
Some varieties make
excellent houseplants.

44. Slide Title
Product A
• Feature 1
• Feature 2
• Feature 3
Product B
• Feature 1
• Feature 2
• Feature 3

45. .

46. Subheading goes here