الفهرس 
Definition of seaweed extracts
On chemical composition of plantsOnly 14 pages are availabe for public view
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Abstract
Tartil Mohamed Emam Ragab: Effect of Application of Seaweed
Extract on Growth and Quality of Some Ornamental Plants.
Unpublished M.Sc. Thesis, Department of Horticulture, Faculty of
Agriculture, Ain Shams University, 2016.
This study was conducted in the vicinity of both the Faculty
of Agriculture, Ain Shams University, Shobra El-Kheima and the
Ornamental Plants Nursery and Greenhouses of the Ministry of
Irrigation, El-Kanater El-Khairia, Qalubia governorate, Egypt during
the two successive seasons of 2012-2013 and 2013-2014.The aim of
this investigation was to study the response of three different
ornamental plant species,i.e. Pot marigold (Calendula officinalis),
African marigold (Tagetes erecta) and Begonia (Begonia
sempervirens)to different application methods and concentrations of
seaweed extracts from a commercial compound. Three separate
experiments were carried out in the open field in the case of
Calendula and Tagetes and in the greenhouse for Begonia. All in all,
seven treatments were initiatedfrom three concentrations of seaweed
extracts (500, 1000 and 1500 ppm) either as foliar spray or as soil
drench application in addition to the control treatment (tap water).
Thetreatments were applied three times.The experimental design was
of a randomized complete block in each experiment. Results
indicated that foliar spray with 1500 ppm of seaweed extracttopot
marigold plants increased significantly plant height, number of
flowers per plant and vase life in the two tested seasons. However,
foliar spray with the lowest concentration of seaweed extract (500
ppm) resulted in significant increments in flower stalk length, flower
diameter and carbohydrates content. Moreover, the same
concentration showed significant increases in total carotenoids,
nitrogen, and phosphorus percentage when used as soil drench in the
two tested seasons. Regarding African marigold, results showed also
that 1500 ppm led to the highest significant values of plant height,
vase life and phosphorus content when used as foliar spray or as soil
drench while 500 ppm as foliar spray improved significantly number
of flowers/plant. Moreover, 1000 ppm as foliar spray showed
significant influence in total carbohydrates, carotenoids content and
total chlorophyll. But 1000 ppm as soil drench revealed higher
significant N and Mn contents in plants. As for Begonia, plant height,
dry weight / plant and total carbohydrates increased significantly with
the application of seaweed extract with 500 ppm applied as soil
drench. Anthocyanin content was increased with soil drench
application of seaweed extract at 1500 ppm. On the other side the
same concentration gave the highest values of N, P, K, Fe and Zn
when used as foliar spray.Meanwhile, 1000 ppm as foliar spray
increased Mn content.
Keywords: Pot marigold, Calendula officinalis, African marigold,
Tagetes erecta, Begonia sempervernis, Seaweed extracts, Vegetative
growth, Flowering, Carbohydrates, Chlorophyll, Carotenoids,
Anthocyanin Nitrogen, Phosphorus.