An introduction about palm trees
Palm trees are mono cotyledonal plants and tropical fruit.The Arabian Gulf,Iran and Iraq are considered the original home of palm trees that have been widely grown in hot dry areas.Saudi Arabia,Iraq,Algeria,Iran,Libya,Egypt and Morocco are the most important states that produce palm trees.There are fewer quantities of these trees in Tunisia,India,The Sudan and The USA....
Nutritional Importance and chemical structure
There are sugar substances,good quantities of dissolved vitamins in water such as thiamin,riboflavin and folic acid and small quantities of ascorbic acid.In a study of structure,the following was found (on the basis of dry weight):
Sugar substances(non reduced)(1.98%).
In addition to that there are the following substances:zinc,potassium,sodium,copper,calcium,phosphorous,magnesium chloride and iron as well as the nutrition value of the dates.
The leaves are used to make mats,baskets,cages,brooms, etc.
Palm trees are mono cotyledonal with one stem.It has one growth point inside the trunk near the top.The trunk doesn't increase in thickness but it increases in length to reach about 24 meters.The leaves are feather like: the length of each ranges from 240-370 cm.The leaflets are compressed and gradually turn into pointed thorns at the base of the leaf.
Palm trees begin to fruit at the age of nearly four in trees grown from palm seedling and after 7-10 years with trees grown from seeds and they last for a hundred years.
Nature of flowers
Palm trees are asphodel.That's to say male and female flowers exist in the tree within a cover that splits naturally on the maturity of flowers The female covers are less in width and growth.
The palm tree's parts
(pictures of the presentation)
photgraphed by Ahmed g
File Type: MS PowerPoint Document: 1.21 M
They have no color or a scent to attract insects.The flowers consists of three separate female parts that once fertilized one of them grows or one or three female parts grow and form seedless fruits that don't ripe naturally.Flowers remain valid for pollination for 3-7 days .
They have six stamens when ripe and produce pollen.They have so sweet and attractive scent that it attracts bees.Flowerage normally begins in March till May according to kind,age and climatic conditions.
A)-Heat:palm trees need a long,hot and sunny long growth season-mild temperature winter.They don't bear frost as the edges of their leaves get frozen at-6 c۫ and their branches get frozen at -9 c۫ .Planting is preferable at 32-38 c.
B)-Rain:palm trees are endamaged by rain in periods of pollination,fruit and ripening of dates.
C)-Irrigation:palm trees need sufficient water depending on climatic conditions and the nature of the plant.
D)-Soil:Palm trees are in accordance with all kinds of soil,particularly yellow clay(silt)soil with good drainage. They put up with saltiness till 22500 per million.
The most important kinds of palm trees
There are more than 500 species registered in different countries that grow them,90% of these species are in the Arab world.
The most important kinds
1-Sweet species:they are called so because of their sweet taste.They are eaten dates,wet dates and dried dates.
2-Sugary species:they are called so because the similarity of their dried date taste and the sugar taste.
3-Barhi species:they are the best palm dried dates in two aspects:
b)-(digestible) in itself and digester.
The original home is Iraq.They have been grown in the USA more than other species.
4-kholas species:they are pure and of high quality and have good taste.
5-Yellow species:it has a yellow color.It keeps its color,taste and validity for consuming for longer than other species of dried dates.It's eaten wet and dried.
6-Amber species:it's the best species the name comes from the color of its dried date with amber shape.
7-Green species:its name comes from its color.These palms are good with international characteristics.They are grown in Libya and Morocco countries from which their planting spread to other countries.Its color is greenish yellow.Its ripe dates have a golden glitter.
8-Nabitet seif:It is the best palm tree in Riyadh area.It is equal in quality with kholas,barhi and sugary species.
9-Nabitet sultan species:It's a good and an excellent species. Planting this palm spread in recent years.